/*
 * Copyright 2016-present Open Networking Laboratory
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.onosproject.yangutils.translator.tojava.utils;

import java.util.List;
import java.util.Map;

import org.onosproject.yangutils.datamodel.YangAtomicPath;
import org.onosproject.yangutils.datamodel.YangAugment;
import org.onosproject.yangutils.datamodel.YangAugmentableNode;
import org.onosproject.yangutils.datamodel.YangCase;
import org.onosproject.yangutils.datamodel.YangChoice;
import org.onosproject.yangutils.datamodel.YangCompilerAnnotation;
import org.onosproject.yangutils.datamodel.YangLeafRef;
import org.onosproject.yangutils.datamodel.YangNode;
import org.onosproject.yangutils.datamodel.YangType;
import org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes;
import org.onosproject.yangutils.translator.exception.TranslatorException;
import org.onosproject.yangutils.translator.tojava.JavaAttributeInfo;
import org.onosproject.yangutils.translator.tojava.JavaFileInfoContainer;
import org.onosproject.yangutils.translator.tojava.JavaFileInfoTranslator;
import org.onosproject.yangutils.utils.io.YangPluginConfig;
import org.onosproject.yangutils.utils.io.impl.JavaDocGen;

import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.BINARY;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.BITS;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.BOOLEAN;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.DECIMAL64;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.EMPTY;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.INT16;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.INT32;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.INT64;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.INT8;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.LEAFREF;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.UINT16;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.UINT32;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.UINT64;
import static org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes.UINT8;
import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_EVENT_SUBJECT_CLASS;
import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_SERVICE_AND_MANAGER;
import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getAugmentedClassNameForDataMethods;
import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getParentNodeNameForDataMethods;
import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getSetOfNodeIdentifiers;
import static org.onosproject.yangutils.translator.tojava.utils.ValidatorTypeForUnionTypes.INT_TYPE_CONFLICT;
import static org.onosproject.yangutils.utils.UtilConstants.ADD;
import static org.onosproject.yangutils.utils.UtilConstants.ADD_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.AND;
import static org.onosproject.yangutils.utils.UtilConstants.APP_INSTANCE;
import static org.onosproject.yangutils.utils.UtilConstants.AUGMENTED;
import static org.onosproject.yangutils.utils.UtilConstants.BASE64;
import static org.onosproject.yangutils.utils.UtilConstants.BIG_DECIMAL;
import static org.onosproject.yangutils.utils.UtilConstants.BIG_INTEGER;
import static org.onosproject.yangutils.utils.UtilConstants.BOOLEAN_DATA_TYPE;
import static org.onosproject.yangutils.utils.UtilConstants.BOOLEAN_WRAPPER;
import static org.onosproject.yangutils.utils.UtilConstants.BREAK;
import static org.onosproject.yangutils.utils.UtilConstants.BUILD;
import static org.onosproject.yangutils.utils.UtilConstants.BUILDER;
import static org.onosproject.yangutils.utils.UtilConstants.BYTE;
import static org.onosproject.yangutils.utils.UtilConstants.BYTE_WRAPPER;
import static org.onosproject.yangutils.utils.UtilConstants.CASE;
import static org.onosproject.yangutils.utils.UtilConstants.CATCH;
import static org.onosproject.yangutils.utils.UtilConstants.CHECK_NOT_NULL_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.CLASS;
import static org.onosproject.yangutils.utils.UtilConstants.CLASS_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_CURLY_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_PARENTHESIS;
import static org.onosproject.yangutils.utils.UtilConstants.COLAN;
import static org.onosproject.yangutils.utils.UtilConstants.COLON;
import static org.onosproject.yangutils.utils.UtilConstants.COMMA;
import static org.onosproject.yangutils.utils.UtilConstants.DECODE;
import static org.onosproject.yangutils.utils.UtilConstants.DEFAULT;
import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_CLOSE_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_OPEN_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.DOUBLE;
import static org.onosproject.yangutils.utils.UtilConstants.EIGHT_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.ELSE;
import static org.onosproject.yangutils.utils.UtilConstants.EMPTY_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.ENUM;
import static org.onosproject.yangutils.utils.UtilConstants.EQUAL;
import static org.onosproject.yangutils.utils.UtilConstants.EQUALS_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.EXCEPTION;
import static org.onosproject.yangutils.utils.UtilConstants.EXCEPTION_VAR;
import static org.onosproject.yangutils.utils.UtilConstants.FALSE;
import static org.onosproject.yangutils.utils.UtilConstants.FILTER_CONTENT_MATCH;
import static org.onosproject.yangutils.utils.UtilConstants.FLAG;
import static org.onosproject.yangutils.utils.UtilConstants.FOR;
import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.FROM_STRING_METHOD_NAME;
import static org.onosproject.yangutils.utils.UtilConstants.FROM_STRING_PARAM_NAME;
import static org.onosproject.yangutils.utils.UtilConstants.GET;
import static org.onosproject.yangutils.utils.UtilConstants.GET_CLASS;
import static org.onosproject.yangutils.utils.UtilConstants.GET_DECODER;
import static org.onosproject.yangutils.utils.UtilConstants.GET_FILTER_LEAF;
import static org.onosproject.yangutils.utils.UtilConstants.GET_LEAF_INDEX;
import static org.onosproject.yangutils.utils.UtilConstants.GET_METHOD;
import static org.onosproject.yangutils.utils.UtilConstants.GET_METHOD_PREFIX;
import static org.onosproject.yangutils.utils.UtilConstants.GOOGLE_MORE_OBJECT_METHOD_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.HASH;
import static org.onosproject.yangutils.utils.UtilConstants.HASH_CODE_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.IF;
import static org.onosproject.yangutils.utils.UtilConstants.ILLEGAL_ACCESS_EXCEPTION;
import static org.onosproject.yangutils.utils.UtilConstants.INSTANCE;
import static org.onosproject.yangutils.utils.UtilConstants.INSTANCE_OF;
import static org.onosproject.yangutils.utils.UtilConstants.INT;
import static org.onosproject.yangutils.utils.UtilConstants.INTEGER_WRAPPER;
import static org.onosproject.yangutils.utils.UtilConstants.INT_MAX_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.INT_MIN_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.INVOCATION_TARGET_EXCEPTION;
import static org.onosproject.yangutils.utils.UtilConstants.INVOKE;
import static org.onosproject.yangutils.utils.UtilConstants.IS_EMPTY;
import static org.onosproject.yangutils.utils.UtilConstants.IS_SELECT_LEAF;
import static org.onosproject.yangutils.utils.UtilConstants.LEAF_IDENTIFIER;
import static org.onosproject.yangutils.utils.UtilConstants.LIST;
import static org.onosproject.yangutils.utils.UtilConstants.LONG;
import static org.onosproject.yangutils.utils.UtilConstants.LONG_MAX_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.LONG_MIN_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.LONG_WRAPPER;
import static org.onosproject.yangutils.utils.UtilConstants.MAP;
import static org.onosproject.yangutils.utils.UtilConstants.MAX_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.MIN_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.NEW;
import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
import static org.onosproject.yangutils.utils.UtilConstants.NOT;
import static org.onosproject.yangutils.utils.UtilConstants.NO_SUCH_METHOD_EXCEPTION;
import static org.onosproject.yangutils.utils.UtilConstants.NULL;
import static org.onosproject.yangutils.utils.UtilConstants.OBJ;
import static org.onosproject.yangutils.utils.UtilConstants.OBJECT;
import static org.onosproject.yangutils.utils.UtilConstants.OBJECT_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.OF;
import static org.onosproject.yangutils.utils.UtilConstants.OMIT_NULL_VALUE_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.OPEN_CURLY_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.OPEN_PARENTHESIS;
import static org.onosproject.yangutils.utils.UtilConstants.OP_PARAM;
import static org.onosproject.yangutils.utils.UtilConstants.OR_OPERATION;
import static org.onosproject.yangutils.utils.UtilConstants.OTHER;
import static org.onosproject.yangutils.utils.UtilConstants.OVERRIDE;
import static org.onosproject.yangutils.utils.UtilConstants.PARSE_BOOLEAN;
import static org.onosproject.yangutils.utils.UtilConstants.PARSE_BYTE;
import static org.onosproject.yangutils.utils.UtilConstants.PARSE_INT;
import static org.onosproject.yangutils.utils.UtilConstants.PARSE_LONG;
import static org.onosproject.yangutils.utils.UtilConstants.PARSE_SHORT;
import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
import static org.onosproject.yangutils.utils.UtilConstants.PUBLIC;
import static org.onosproject.yangutils.utils.UtilConstants.PUT;
import static org.onosproject.yangutils.utils.UtilConstants.QUESTION_MARK;
import static org.onosproject.yangutils.utils.UtilConstants.QUEUE;
import static org.onosproject.yangutils.utils.UtilConstants.QUOTES;
import static org.onosproject.yangutils.utils.UtilConstants.REPLACE_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.RETURN;
import static org.onosproject.yangutils.utils.UtilConstants.RPC_INPUT_VAR_NAME;
import static org.onosproject.yangutils.utils.UtilConstants.SEMI_COLAN;
import static org.onosproject.yangutils.utils.UtilConstants.SET;
import static org.onosproject.yangutils.utils.UtilConstants.SET_METHOD_PREFIX;
import static org.onosproject.yangutils.utils.UtilConstants.SET_SELECT_LEAF;
import static org.onosproject.yangutils.utils.UtilConstants.SHORT;
import static org.onosproject.yangutils.utils.UtilConstants.SHORT_WRAPPER;
import static org.onosproject.yangutils.utils.UtilConstants.SINGLE_QUOTE;
import static org.onosproject.yangutils.utils.UtilConstants.SIXTEEN_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
import static org.onosproject.yangutils.utils.UtilConstants.SPLIT_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.SQUARE_BRACKETS;
import static org.onosproject.yangutils.utils.UtilConstants.STATIC;
import static org.onosproject.yangutils.utils.UtilConstants.STRING_DATA_TYPE;
import static org.onosproject.yangutils.utils.UtilConstants.SUFFIX_S;
import static org.onosproject.yangutils.utils.UtilConstants.SWITCH;
import static org.onosproject.yangutils.utils.UtilConstants.THIS;
import static org.onosproject.yangutils.utils.UtilConstants.TMP_VAL;
import static org.onosproject.yangutils.utils.UtilConstants.TMP_VAR;
import static org.onosproject.yangutils.utils.UtilConstants.TO;
import static org.onosproject.yangutils.utils.UtilConstants.TRIM_STRING;
import static org.onosproject.yangutils.utils.UtilConstants.TRUE;
import static org.onosproject.yangutils.utils.UtilConstants.TRY;
import static org.onosproject.yangutils.utils.UtilConstants.TWELVE_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.TWENTY_FOUR_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.TWENTY_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.UINT_MAX_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.UINT_MIN_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.ULONG_MAX_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.ULONG_MIN_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.VALIDATE_RANGE;
import static org.onosproject.yangutils.utils.UtilConstants.VALUE;
import static org.onosproject.yangutils.utils.UtilConstants.VALUE_LEAF_SET;
import static org.onosproject.yangutils.utils.UtilConstants.VOID;
import static org.onosproject.yangutils.utils.UtilConstants.YANG_AUGMENTED_INFO;
import static org.onosproject.yangutils.utils.UtilConstants.YANG_AUGMENTED_OP_PARAM_INFO;
import static org.onosproject.yangutils.utils.UtilConstants.YANG_UTILS_TODO;
import static org.onosproject.yangutils.utils.UtilConstants.ZERO;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.BUILD_METHOD;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.CONSTRUCTOR;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.DEFAULT_CONSTRUCTOR;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.FROM_METHOD;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.GETTER_METHOD;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.MANAGER_SETTER_METHOD;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.OF_METHOD;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.SETTER_METHOD;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.TYPE_CONSTRUCTOR;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.generateForAddAugmentation;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.generateForBuilderMethod;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.generateForGetAugmentation;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.generateForGetMethodWithAttribute;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.generateForValidatorMethod;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.getCamelCase;
import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.getCapitalCase;
import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.getSmallCase;
import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.trimAtLast;

/**
 * Represents generator for methods of generated files based on the file type.
 */
public final class MethodsGenerator {
    private static final String BITS_STRING_ARRAY_VAR = "bitsTemp";
    private static final String BIT_TEMP_VAR = "bitTemp";

    /**
     * Creates an instance of method generator.
     */
    private MethodsGenerator() {
    }

    /**
     * Returns the methods strings for builder interface.
     *
     * @param name         attribute name
     * @param pluginConfig plugin configurations
     * @return method string for builder interface
     */
    public static String parseBuilderInterfaceBuildMethodString(String name, YangPluginConfig pluginConfig) {
        return getJavaDoc(BUILD_METHOD, name, false, pluginConfig, null) + getBuildForInterface(name);
    }

    /**
     * Returns getter string.
     *
     * @param attr               attribute info
     * @param generatedJavaFiles generated java files
     * @param pluginConfig       plugin configurations
     * @return getter string
     */
    public static String getGetterString(JavaAttributeInfo attr, int generatedJavaFiles,
                                         YangPluginConfig pluginConfig) {
        String returnType = getReturnType(attr);
        String attributeName = attr.getAttributeName();
        String appDataStructure = null;
        if (attr.getCompilerAnnotation() != null) {
            appDataStructure = attr.getCompilerAnnotation().getYangAppDataStructure().getDataStructure().name();
        }
        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            return generateForGetMethodWithAttribute(returnType)
                    + getGetterForInterface(attributeName, returnType, attr.isListAttr(), generatedJavaFiles,
                    attr.getCompilerAnnotation());
        }

        return getJavaDoc(GETTER_METHOD, attributeName, attr.isListAttr(), pluginConfig, appDataStructure)
                + getGetterForInterface(attributeName, returnType, attr.isListAttr(), generatedJavaFiles,
                attr.getCompilerAnnotation());
    }

    /**
     * Returns setter string.
     *
     * @param attr               attribute info
     * @param className          java class name
     * @param generatedJavaFiles generated java files
     * @param pluginConfig       plugin configurations
     * @return setter string
     */
    public static String getSetterString(JavaAttributeInfo attr, String className, int generatedJavaFiles,
                                         YangPluginConfig pluginConfig) {
        String attrType = getReturnType(attr);
        String attributeName = attr.getAttributeName();
        JavaDocGen.JavaDocType type;
        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            type = MANAGER_SETTER_METHOD;
        } else {
            type = SETTER_METHOD;
        }

        String appDataStructure = null;
        if (attr.getCompilerAnnotation() != null) {
            appDataStructure = attr.getCompilerAnnotation().getYangAppDataStructure().getDataStructure().name();
        }
        return getJavaDoc(type, attributeName, attr.isListAttr(), pluginConfig, appDataStructure)
                + getSetterForInterface(attributeName, attrType, className, attr.isListAttr(), generatedJavaFiles,
                attr.getCompilerAnnotation());
    }

    /**
     * Returns constructor method string.
     *
     * @param name         class name
     * @param pluginConfig plugin configurations
     * @return constructor string
     */
    private static String getConstructorString(String name, YangPluginConfig pluginConfig) {
        return getJavaDoc(CONSTRUCTOR, name, false, pluginConfig, null);
    }

    /**
     * Returns default constructor method string.
     *
     * @param name         class name
     * @param modifierType modifier type
     * @param pluginConfig plugin configurations
     * @return default constructor string
     */
    public static String getDefaultConstructorString(String name, String modifierType,
                                                     YangPluginConfig pluginConfig) {
        return getJavaDoc(DEFAULT_CONSTRUCTOR, name, false, pluginConfig, null)
                + getDefaultConstructor(name, modifierType) + NEW_LINE;
    }

    /**
     * Returns check not null string.
     *
     * @param name attribute name
     * @return check not null string
     */
    static String getCheckNotNull(String name) {
        return EIGHT_SPACE_INDENTATION + CHECK_NOT_NULL_STRING + OPEN_PARENTHESIS + name + COMMA + SPACE + name
                + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns build method string.
     *
     * @param name       class name
     * @param isRootNode if root node
     * @return build string
     */
    public static String getBuildString(String name, boolean isRootNode) {
        if (isRootNode) {
            return NEW_LINE + getBuild(name, true);
        }
        return FOUR_SPACE_INDENTATION + OVERRIDE + NEW_LINE + getBuild(name, false);
    }

    /**
     * Returns the getter method strings for class file.
     *
     * @param attr               attribute info
     * @param generatedJavaFiles for the type of java file being generated
     * @return getter method for class
     */
    public static String getGetterForClass(JavaAttributeInfo attr, int generatedJavaFiles) {
        String attrQualifiedType = getReturnType(attr);
        String attributeName = attr.getAttributeName();

        if (!attr.isListAttr()) {
            return getGetter(attrQualifiedType, attributeName, generatedJavaFiles);
        }
        String attrParam = getListAttribute(attrQualifiedType, attr.getCompilerAnnotation());
        return getGetter(attrParam, attributeName, generatedJavaFiles);
    }

    /**
     * Returns getter for attribute.
     *
     * @param type               return type
     * @param name               attribute name
     * @param generatedJavaFiles generated java files
     * @return getter for attribute
     */
    static String getGetter(String type, String name, int generatedJavaFiles) {
        String ret = parseTypeForReturnValue(type);
        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + type + SPACE + GET_METHOD_PREFIX + getCapitalCase(name)
                    + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE +
                    EIGHT_SPACE_INDENTATION + YANG_UTILS_TODO + NEW_LINE + EIGHT_SPACE_INDENTATION +
                    RETURN + SPACE + ret + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
        } else {
            return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + type + SPACE + name
                    + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE +
                    EIGHT_SPACE_INDENTATION + RETURN + SPACE + name + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION
                    + CLOSE_CURLY_BRACKET;
        }
    }

    /*Provides string to return for type.*/
    private static String parseTypeForReturnValue(String type) {
        switch (type) {
            case BYTE:
            case INT:
            case SHORT:
            case LONG:
            case DOUBLE:
                return "0";
            case BOOLEAN_DATA_TYPE:
                return FALSE;
            default:
                return null;
        }
    }

    /**
     * Returns the setter method strings for class file.
     *
     * @param attr               attribute info
     * @param className          name of the class
     * @param generatedJavaFiles generated java files
     * @return setter method for class
     */
    public static String getSetterForClass(JavaAttributeInfo attr, String className, int generatedJavaFiles) {
        String attrQualifiedType = getReturnType(attr);
        String attributeName = attr.getAttributeName();
        boolean isTypeNull = false;
        if (attr.getAttributeType() == null) {
            isTypeNull = true;
        }
        if (!attr.isListAttr()) {
            return getSetter(className, attributeName, attrQualifiedType, generatedJavaFiles, isTypeNull, false);
        }
        String attrParam = getListAttribute(attrQualifiedType, attr.getCompilerAnnotation());
        return getSetter(className, attributeName, attrParam, generatedJavaFiles, isTypeNull, true);
    }

    /**
     * Returns setter for attribute.
     *
     * @param className  class name
     * @param name       attribute name
     * @param type       return type
     * @param isTypeNull if attribute type is null
     * @param isList     true if leaf-list
     * @return setter for attribute
     */
    private static String getSetter(String className, String name, String type, int generatedJavaFiles,
                                    boolean isTypeNull, boolean isList) {
        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + SET_METHOD_PREFIX
                    + getCapitalCase(name) + OPEN_PARENTHESIS + type + SPACE + name + CLOSE_PARENTHESIS + SPACE +
                    OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + YANG_UTILS_TODO +
                    NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
        } else if (generatedJavaFiles == GENERATE_EVENT_SUBJECT_CLASS) {
            return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + name + OPEN_PARENTHESIS + type + SPACE
                    + name + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION
                    + THIS + PERIOD + name + SPACE + EQUAL + SPACE + name + SEMI_COLAN + NEW_LINE
                    + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
        } else {
            String method = FOUR_SPACE_INDENTATION + PUBLIC + SPACE + className + BUILDER + SPACE +
                    name + OPEN_PARENTHESIS + type + SPACE + name + CLOSE_PARENTHESIS + SPACE
                    + OPEN_CURLY_BRACKET;
            if (!isTypeNull && !isList) {
                method = method + getValueLeafSetString(name);
            } else {
                method = method + EMPTY_STRING;
            }
            return method + NEW_LINE + EIGHT_SPACE_INDENTATION + THIS +
                    PERIOD + name + SPACE
                    + EQUAL + SPACE + name + SEMI_COLAN + NEW_LINE + EIGHT_SPACE_INDENTATION + RETURN + SPACE
                    + THIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
        }

    }

    //Returns value leaf flag setter.
    private static String getValueLeafSetString(String name) {
        return "\n        getValueLeafFlags().set(LeafIdentifier." + name.toUpperCase() + ".getLeafIndex());";
    }

    /**
     * Returns the setter method strings for class file.
     *
     * @param attr attribute info
     * @return setter method for class
     */
    static String getSetterForTypeDefClass(JavaAttributeInfo attr) {

        String attrQualifiedType = getReturnType(attr);
        String attributeName = attr.getAttributeName();
        return getTypeDefSetter(attrQualifiedType, attributeName);
    }

    /**
     * Returns type def's setter for attribute.
     *
     * @param type data type
     * @param name attribute name
     * @return setter for type def's attribute
     */
    private static String getTypeDefSetter(String type, String name) {
        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + SET_METHOD_PREFIX + getCapitalCase(name)
                + OPEN_PARENTHESIS + type + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                + EIGHT_SPACE_INDENTATION + THIS + PERIOD + name + SPACE + EQUAL + SPACE + VALUE + SEMI_COLAN +
                NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns override string.
     *
     * @return override string
     */
    public static String getOverRideString() {
        return NEW_LINE + FOUR_SPACE_INDENTATION + OVERRIDE + NEW_LINE;
    }

    /**
     * Returns the getter method strings for interface file.
     *
     * @param yangName           name of the attribute
     * @param returnType         return type of attribute
     * @param isList             is list attribute
     * @param generatedJavaFiles generated java files
     * @param compilerAnnotation compiler annotation
     * @return getter method for interface
     */
    static String getGetterForInterface(String yangName, String returnType, boolean isList,
                                        int generatedJavaFiles, YangCompilerAnnotation compilerAnnotation) {
        if (!isList) {
            return getGetterInterfaceString(returnType, yangName, generatedJavaFiles);
        }
        String listAttr = getListAttribute(returnType, compilerAnnotation);
        return getGetterInterfaceString(listAttr, yangName, generatedJavaFiles);
    }

    /**
     * Returns getter for attribute in interface.
     *
     * @param returnType return type
     * @param yangName   attribute name
     * @return getter for interface
     */
    private static String getGetterInterfaceString(String returnType, String yangName,
                                                   int generatedJavaFiles) {
        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            return getGetMethodWithArgument(returnType, yangName);
        } else {
            return FOUR_SPACE_INDENTATION + returnType + SPACE + yangName
                    + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN;
        }
    }

    /**
     * Returns the setter method strings for interface file.
     *
     * @param attrName           name of the attribute
     * @param attrType           return type of attribute
     * @param className          name of the java class being generated
     * @param isList             is list attribute
     * @param generatedJavaFiles generated java files
     * @param compilerAnnotation compiler annotations
     * @return setter method for interface
     */
    static String getSetterForInterface(String attrName, String attrType, String className,
                                        boolean isList, int generatedJavaFiles,
                                        YangCompilerAnnotation compilerAnnotation) {
        if (!isList) {
            return getSetterInterfaceString(className, attrName, attrType, generatedJavaFiles);
        }

        String listAttr = getListAttribute(attrType, compilerAnnotation);
        return getSetterInterfaceString(className, attrName, listAttr, generatedJavaFiles);
    }

    /**
     * Returns setter string for interface.
     *
     * @param className class name
     * @param attrName  attribute name
     * @param attrType  attribute type
     * @return setter string
     */
    private static String getSetterInterfaceString(String className, String attrName, String attrType,
                                                   int generatedJavaFiles) {
        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            return FOUR_SPACE_INDENTATION + VOID + SPACE + SET_METHOD_PREFIX + getCapitalCase(attrName)
                    + OPEN_PARENTHESIS + attrType + SPACE + attrName + CLOSE_PARENTHESIS + SEMI_COLAN;
        } else {
            return FOUR_SPACE_INDENTATION + className + BUILDER + SPACE + attrName
                    + OPEN_PARENTHESIS + attrType + SPACE + attrName + CLOSE_PARENTHESIS + SEMI_COLAN;
        }
    }

    /**
     * Returns list string.
     *
     * @return list string
     */
    private static String getListString() {
        return LIST + DIAMOND_OPEN_BRACKET;
    }

    /**
     * Returns return type for attribute.
     *
     * @param attr attribute info
     * @return return type
     */
    private static String getReturnType(JavaAttributeInfo attr) {
        String returnType = EMPTY_STRING;
        if (attr.isQualifiedName() && attr.getImportInfo().getPkgInfo() != null) {
            returnType = attr.getImportInfo().getPkgInfo() + PERIOD;
        }
        returnType = returnType + attr.getImportInfo().getClassInfo();
        return returnType;
    }

    /**
     * Returns the build method strings for interface file.
     *
     * @param yangName name of the interface
     * @return build method for interface
     */
    static String getBuildForInterface(String yangName) {
        return FOUR_SPACE_INDENTATION + yangName + SPACE + BUILD + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN
                + NEW_LINE;
    }

    /**
     * Returns constructor string for impl class.
     *
     * @param yangName     class name
     * @param pluginConfig plugin configurations
     * @param isRootNode   if root node
     * @return constructor string
     */
    static String getConstructorStart(String yangName, YangPluginConfig pluginConfig, boolean isRootNode) {
        String javadoc = getConstructorString(yangName, pluginConfig);

        String returnType = getCapitalCase(DEFAULT) + yangName;
        if (isRootNode) {
            returnType = yangName + OP_PARAM;
        }
        String constructor = FOUR_SPACE_INDENTATION + PUBLIC + SPACE + returnType +
                OPEN_PARENTHESIS + yangName + BUILDER + SPACE + BUILDER.toLowerCase() + OBJECT
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
        return javadoc + constructor;
    }

    /**
     * Returns the constructor strings for class file.
     *
     * @param attr               attribute info
     * @param generatedJavaFiles generated java files
     * @param pluginConfig       plugin configurations
     * @return constructor for class
     */
    public static String getConstructor(JavaAttributeInfo attr, int generatedJavaFiles,
                                        YangPluginConfig pluginConfig) {
        String attributeName = attr.getAttributeName();
        String constructor;

        if (generatedJavaFiles == GENERATE_SERVICE_AND_MANAGER) {
            constructor = EIGHT_SPACE_INDENTATION + THIS + PERIOD
                    + getCamelCase(attributeName, pluginConfig.getConflictResolver()) + SPACE + EQUAL
                    + SPACE + BUILDER.toLowerCase() + OBJECT + PERIOD + GET_METHOD_PREFIX
                    + getCapitalCase(getCamelCase(attributeName, pluginConfig.getConflictResolver()))
                    + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
        } else {
            constructor = EIGHT_SPACE_INDENTATION + THIS + PERIOD
                    + getCamelCase(attributeName, pluginConfig.getConflictResolver()) + SPACE + EQUAL
                    + SPACE + BUILDER.toLowerCase() + OBJECT + PERIOD
                    + getCamelCase(attributeName, pluginConfig.getConflictResolver()) +
                    OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
        }
        return constructor;
    }

    /**
     * Returns the rpc strings for service interface.
     *
     * @param rpcName      name of the rpc
     * @param inputName    name of input
     * @param outputName   name of output
     * @param pluginConfig plugin configurations
     * @return rpc method string
     */
    public static String getRpcServiceMethod(String rpcName, String inputName, String outputName,
                                             YangPluginConfig pluginConfig) {
        rpcName = getCamelCase(rpcName, pluginConfig.getConflictResolver());
        if (!inputName.equals(EMPTY_STRING)) {
            inputName = inputName + SPACE + RPC_INPUT_VAR_NAME;
        }
        return FOUR_SPACE_INDENTATION + outputName + SPACE + rpcName + OPEN_PARENTHESIS + inputName
                + CLOSE_PARENTHESIS + SEMI_COLAN;
    }

    /**
     * Returns the rpc strings for manager impl.
     *
     * @param rpcName      name of the rpc
     * @param inputName    name of input
     * @param outputName   name of output
     * @param pluginConfig plugin configurations
     * @return rpc method string
     */
    public static String getRpcManagerMethod(String rpcName, String inputName, String outputName,
                                             YangPluginConfig pluginConfig) {
        rpcName = getCamelCase(rpcName, pluginConfig.getConflictResolver());
        if (!inputName.equals(EMPTY_STRING)) {
            inputName = inputName + SPACE + RPC_INPUT_VAR_NAME;
        }

        String method = getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + outputName + SPACE + rpcName
                + OPEN_PARENTHESIS + inputName + CLOSE_PARENTHESIS + SPACE
                + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + YANG_UTILS_TODO + NEW_LINE;
        if (!outputName.contentEquals(VOID)) {
            method += EIGHT_SPACE_INDENTATION + RETURN + SPACE + parseTypeForReturnValue(outputName) + SEMI_COLAN
                    + NEW_LINE;
        }
        method += FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
        return method;
    }

    /**
     * Returns the build method strings for class file.
     *
     * @param yangName   class name
     * @param isRootNode if root node
     * @return build method string for class
     */
    static String getBuild(String yangName, boolean isRootNode) {
        String type = getCapitalCase(DEFAULT) + yangName;
        if (isRootNode) {
            type = yangName + OP_PARAM;
        }
        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + yangName + SPACE + BUILD + OPEN_PARENTHESIS +
                CLOSE_PARENTHESIS
                + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE +
                type + OPEN_PARENTHESIS + THIS + CLOSE_PARENTHESIS + SEMI_COLAN
                + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns the Default constructor strings for class file.
     *
     * @param name         name of the class
     * @param modifierType modifier type for default constructor
     * @return Default constructor for class
     */
    private static String getDefaultConstructor(String name, String modifierType) {
        return FOUR_SPACE_INDENTATION + modifierType + SPACE + name + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE
                + OPEN_CURLY_BRACKET + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns to string method's open strings.
     *
     * @return string method's open string
     */
    static String getToStringMethodOpen() {
        return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STRING_DATA_TYPE + SPACE + TO
                + STRING_DATA_TYPE + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                + EIGHT_SPACE_INDENTATION + RETURN + GOOGLE_MORE_OBJECT_METHOD_STRING + NEW_LINE;
    }

    /**
     * Returns whether the data type is of primitive data type.
     *
     * @param dataType data type to be checked
     * @return true, if data type can have primitive data type, false otherwise
     */
    private static boolean isPrimitiveDataType(YangDataTypes dataType) {
        return dataType == INT8
                || dataType == INT16
                || dataType == INT32
                || dataType == INT64
                || dataType == UINT8
                || dataType == UINT16
                || dataType == UINT32
                || dataType == UINT64
                || dataType == DECIMAL64
                || dataType == BOOLEAN
                || dataType == EMPTY;

    }

    private static String getAttrTypeForFilterContentMatchWhenPrimitiveDataType(String attributeName) {
        return APP_INSTANCE + PERIOD + attributeName + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                + SPACE + NOT + EQUAL + SPACE + attributeName + OPEN_PARENTHESIS
                + CLOSE_PARENTHESIS;
    }

    private static String getAttrTypeForFilterContentMatchWhenNonPrimitiveDataTypes(String attributeName) {
        return APP_INSTANCE + PERIOD + attributeName + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                + SPACE + EQUAL + EQUAL + SPACE + NULL + SPACE + OR_OPERATION + SPACE
                + NOT + OPEN_PARENTHESIS + attributeName + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                + PERIOD + EQUALS_STRING + OPEN_PARENTHESIS + APP_INSTANCE + PERIOD
                + attributeName + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS;
    }

    private static String getIfFilterContentMatchMethodImpl(String attributeName,
                                                            YangType dataType) {
        String attrQualifiedType;

        if (isPrimitiveDataType(dataType.getDataType())) {
            attrQualifiedType = getAttrTypeForFilterContentMatchWhenPrimitiveDataType(attributeName);
        } else if (dataType.getDataType() == LEAFREF) {
            YangType type = ((YangLeafRef) dataType.getDataTypeExtendedInfo()).getEffectiveDataType();
            if (isPrimitiveDataType(type.getDataType())) {
                attrQualifiedType = getAttrTypeForFilterContentMatchWhenPrimitiveDataType(attributeName);
            } else {
                attrQualifiedType = getAttrTypeForFilterContentMatchWhenNonPrimitiveDataTypes(attributeName);
            }
        } else {
            attrQualifiedType = getAttrTypeForFilterContentMatchWhenNonPrimitiveDataTypes(attributeName);
        }

        return attrQualifiedType;
    }

    /**
     * Returns is filter content match for leaf.
     *
     * @param javaAttributeInfo java attribute
     * @param type              data type
     * @return is filter content match for leaf
     */
    public static String getIsFilerContentMatchForLeaf(JavaAttributeInfo javaAttributeInfo, YangType<?> type) {
        String attrQualifiedType;
        String attributeName = javaAttributeInfo.getAttributeName();
        attrQualifiedType = getIfFilterContentMatchMethodImpl(attributeName,
                type);
        return EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS
                + GET_FILTER_LEAF + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + PERIOD + GET_METHOD_PREFIX
                + OPEN_PARENTHESIS + LEAF_IDENTIFIER + PERIOD + attributeName.toUpperCase() + PERIOD +
                GET_LEAF_INDEX
                + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS
                + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION + IF + SPACE
                + OPEN_PARENTHESIS + attrQualifiedType + CLOSE_PARENTHESIS + SPACE
                + OPEN_CURLY_BRACKET + NEW_LINE + SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + FALSE
                + SEMI_COLAN + NEW_LINE + TWELVE_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE
                + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns is filter content match for leaf.
     *
     * @param javaAttributeInfo java attribute
     * @return is filter content match for leaf
     */
    public static String getIsFilerContentMatchForLeafList(JavaAttributeInfo javaAttributeInfo) {
        String attributeName = javaAttributeInfo.getAttributeName();
        return getIsFileContentMatchForLists(getCapitalCase(attributeName), true,
                javaAttributeInfo.getImportInfo().getClassInfo());
    }

    /**
     * Returns is filter content match for leaf.
     *
     * @param curNode      current node
     * @param pluginConfig plugin configurations
     * @return is filter content match for leaf
     */
    static String getIsFilterContentMatchStart(YangNode curNode, YangPluginConfig pluginConfig) {
        JavaFileInfoTranslator javaFileInfo = ((JavaFileInfoContainer) curNode).getJavaFileInfo();
        JavaFileInfoTranslator parentInfo;

        String instance = APP_INSTANCE;
        String name = getCapitalCase(javaFileInfo.getJavaName());
        if (curNode instanceof YangCase) {
            instance = INSTANCE;
            YangNode parent = curNode.getParent();
            if (parent instanceof YangChoice) {
                parentInfo = ((JavaFileInfoContainer) parent).getJavaFileInfo();
                name = getCapitalCase(parentInfo.getJavaName());
            } else if (parent instanceof YangAugment) {
                parentInfo = ((JavaFileInfoContainer) ((YangAugment) parent).getAugmentedNode()).getJavaFileInfo();
                if (parentInfo != null) {
                    name = getCapitalCase(parentInfo.getJavaName());
                } else {
                    name = getCapitalCase(getCamelCase(((YangAugment) parent).getAugmentedNode().getName(),
                            pluginConfig.getConflictResolver()));
                }
            }
        }
        String filterMethod = getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + BOOLEAN_DATA_TYPE
                + SPACE + FILTER_CONTENT_MATCH + OPEN_PARENTHESIS + name
                + SPACE + instance + CLOSE_PARENTHESIS + SPACE
                + OPEN_CURLY_BRACKET + NEW_LINE;
        if (curNode instanceof YangCase) {
            String caseName = getCapitalCase(javaFileInfo.getJavaName());
            filterMethod = filterMethod + EIGHT_SPACE_INDENTATION + caseName + SPACE + APP_INSTANCE + SPACE + EQUAL
                    + SPACE
                    + OPEN_PARENTHESIS + caseName + CLOSE_PARENTHESIS + SPACE + instance + SEMI_COLAN + NEW_LINE;
        }
        if (curNode instanceof YangAugmentableNode) {
            filterMethod = filterMethod + getAugmentableOpParamSyntax();
        }
        return filterMethod;
    }

    /**
     * Returns is filter content match for node.
     *
     * @param name   attribute name
     * @param isList if list node
     * @return is filter content match for node
     */
    public static String getIsFilterContentForNodes(String name, boolean isList) {
        name = getCapitalCase(name);
        if (isList) {
            return getIsFileContentMatchForLists(name, false, null);
        } else {
            return getIsFilerContentMatchForChildNode(name);
        }
    }

    /**
     * Returns is filter content match close.
     *
     * @return is filter content match close
     */
    static String getIsFilerContentMatchClose() {
        return EIGHT_SPACE_INDENTATION + RETURN + SPACE + TRUE + SEMI_COLAN +
                NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns filter content match for child nodes.
     *
     * @param name name of node
     * @return filter content match for child nodes
     */
    private static String getIsFilerContentMatchForChildNode(String name) {
        name = getSmallCase(name);
        String method = EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + name + OPEN_PARENTHESIS +
                CLOSE_PARENTHESIS + SPACE + NOT + EQUAL + SPACE + NULL + CLOSE_PARENTHESIS + SPACE +
                OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + APP_INSTANCE
                + PERIOD + name + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + EQUAL
                + EQUAL + SPACE + NULL + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE +
                SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + FALSE + SEMI_COLAN + NEW_LINE + TWELVE_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET + NEW_LINE;
        return method + TWELVE_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + name + OPEN_PARENTHESIS +
                CLOSE_PARENTHESIS + PERIOD + FILTER_CONTENT_MATCH + OPEN_PARENTHESIS + APP_INSTANCE + PERIOD + name +
                OPEN_PARENTHESIS + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS + SPACE +
                OPEN_CURLY_BRACKET + NEW_LINE + SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + FALSE + SEMI_COLAN +
                NEW_LINE + TWELVE_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns filter content match for list types.
     *
     * @param name       name of node
     * @param isLeafList if for leaf list
     * @param type       type of the attribute
     * @return filter content match for list types
     */
    private static String getIsFileContentMatchForLists(String name, boolean isLeafList, String type) {
        String method = EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + getSmallCase(name) + OPEN_PARENTHESIS
                + CLOSE_PARENTHESIS + SPACE + NOT + EQUAL + SPACE + NULL + SPACE + AND + AND + SPACE + NOT +
                getSmallCase(name) + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + PERIOD + IS_EMPTY +
                CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET
                + NEW_LINE;
        method = method + TWELVE_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + APP_INSTANCE + PERIOD +
                getSmallCase(name)
                + OPEN_PARENTHESIS
                + CLOSE_PARENTHESIS + SPACE + EQUAL + EQUAL + SPACE + NULL + SPACE + "||" + SPACE +
                getSmallCase(name) + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + PERIOD + IS_EMPTY + CLOSE_PARENTHESIS +
                SPACE + OPEN_CURLY_BRACKET
                + NEW_LINE + SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + FALSE + SEMI_COLAN + NEW_LINE +
                TWELVE_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
        if (isLeafList) {
            if (type.equals(getSmallCase(STRING_DATA_TYPE))) {
                type = STRING_DATA_TYPE;
            }
            method = method + TWELVE_SPACE_INDENTATION + FOR + SPACE + OPEN_PARENTHESIS + type + SPACE +
                    getSmallCase(name)
                    + SPACE + COLAN + SPACE + getSmallCase(name) + OPEN_PARENTHESIS + CLOSE_PARENTHESIS +
                    CLOSE_PARENTHESIS
                    + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + SIXTEEN_SPACE_INDENTATION + BOOLEAN_DATA_TYPE + SPACE +
                    FLAG + SPACE + EQUAL + SPACE + FALSE + SEMI_COLAN + NEW_LINE;
            method = method + SIXTEEN_SPACE_INDENTATION + FOR + SPACE + OPEN_PARENTHESIS + type + SPACE +
                    TMP_VAR + getSmallCase(name)
                    + SPACE + COLAN + SPACE + APP_INSTANCE + PERIOD + getSmallCase(name) + OPEN_PARENTHESIS
                    + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
            method = method + TWENTY_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + getSmallCase(name) + PERIOD;
        } else {
            method = method + TWELVE_SPACE_INDENTATION + FOR + SPACE + OPEN_PARENTHESIS + name + SPACE +
                    getSmallCase(name)
                    + SPACE + COLAN + SPACE + getSmallCase(name) + OPEN_PARENTHESIS + CLOSE_PARENTHESIS +
                    CLOSE_PARENTHESIS
                    + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + SIXTEEN_SPACE_INDENTATION + BOOLEAN_DATA_TYPE + SPACE +
                    FLAG + SPACE + EQUAL + SPACE + FALSE + SEMI_COLAN + NEW_LINE;
            method = method + SIXTEEN_SPACE_INDENTATION + FOR + SPACE + OPEN_PARENTHESIS + name + SPACE +
                    TMP_VAR + getSmallCase(name)
                    + SPACE + COLAN + SPACE + APP_INSTANCE + PERIOD + getSmallCase(name) + OPEN_PARENTHESIS
                    + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
            method = method + TWENTY_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + getSmallCase(name) + PERIOD;
        }
        if (!isLeafList) {
            method = method + FILTER_CONTENT_MATCH;
        } else {
            method = method + EQUALS_STRING;
        }
        method = method + OPEN_PARENTHESIS + TMP_VAR + getSmallCase(name) + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS
                + SPACE +
                OPEN_CURLY_BRACKET + NEW_LINE + TWENTY_FOUR_SPACE_INDENTATION + FLAG + SPACE + EQUAL + SPACE + TRUE +
                SEMI_COLAN
                + NEW_LINE + TWENTY_FOUR_SPACE_INDENTATION + BREAK + SEMI_COLAN + NEW_LINE + TWENTY_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET + NEW_LINE + SIXTEEN_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;

        method = method + SIXTEEN_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + NOT + FLAG
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWENTY_SPACE_INDENTATION
                + RETURN + SPACE + FALSE + SEMI_COLAN + NEW_LINE + SIXTEEN_SPACE_INDENTATION + CLOSE_CURLY_BRACKET +
                NEW_LINE;
        return method + TWELVE_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET + NEW_LINE;

    }

    //Returns method string for op params augmented syntax
    private static String getAugmentableOpParamSyntax() {
        return EIGHT_SPACE_INDENTATION + FOR + SPACE + OPEN_PARENTHESIS + OBJECT_STRING + SPACE +
                getSmallCase(YANG_AUGMENTED_INFO) + SPACE + COLAN + SPACE + THIS +
                PERIOD + getSmallCase(YANG_AUGMENTED_INFO) + MAP + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + PERIOD
                + VALUE + "s" + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET +
                NEW_LINE + TWELVE_SPACE_INDENTATION + OBJECT_STRING + SPACE +
                getSmallCase(YANG_AUGMENTED_OP_PARAM_INFO) + SPACE + EQUAL + SPACE + APP_INSTANCE + PERIOD +
                getSmallCase(YANG_AUGMENTED_INFO) + OPEN_PARENTHESIS + APP_INSTANCE + PERIOD + GET_CLASS +
                CLOSE_PARENTHESIS + SEMI_COLAN +
                NEW_LINE + TWELVE_SPACE_INDENTATION
                + BOOLEAN_DATA_TYPE + SPACE + FILTER_CONTENT_MATCH + SPACE + EQUAL + SPACE + FALSE + SEMI_COLAN
                + NEW_LINE + TWELVE_SPACE_INDENTATION + TRY + SPACE + OPEN_CURLY_BRACKET + NEW_LINE +
                SIXTEEN_SPACE_INDENTATION +
                FILTER_CONTENT_MATCH + SPACE + EQUAL + SPACE + OPEN_PARENTHESIS
                + BOOLEAN_DATA_TYPE + CLOSE_PARENTHESIS + SPACE + getSmallCase(YANG_AUGMENTED_INFO) + PERIOD +
                GET_CLASS + NEW_LINE + TWENTY_SPACE_INDENTATION + PERIOD + GET_METHOD
                + OPEN_PARENTHESIS + QUOTES + FILTER_CONTENT_MATCH + QUOTES + COMMA + SPACE + OBJECT_STRING + PERIOD
                + CLASS + CLOSE_PARENTHESIS + PERIOD + INVOKE + OPEN_PARENTHESIS + getSmallCase(YANG_AUGMENTED_INFO) +
                NEW_LINE + TWENTY_FOUR_SPACE_INDENTATION + PERIOD + GET_CLASS + COMMA + SPACE +
                getSmallCase(YANG_AUGMENTED_OP_PARAM_INFO)
                + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE
                + TWELVE_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + SPACE + CATCH + SPACE + OPEN_PARENTHESIS
                + NO_SUCH_METHOD_EXCEPTION + " | " + INVOCATION_TARGET_EXCEPTION + " | " + ILLEGAL_ACCESS_EXCEPTION +
                SPACE + EXCEPTION_VAR + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                + SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + FALSE + SEMI_COLAN + NEW_LINE + TWELVE_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION
                + IF + SPACE + OPEN_PARENTHESIS + NOT + FILTER_CONTENT_MATCH + CLOSE_PARENTHESIS +
                SPACE + OPEN_CURLY_BRACKET + NEW_LINE + SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + FALSE +
                SEMI_COLAN + NEW_LINE + TWELVE_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /*
     * Returns omit null value string.
     *
     * @return omit null value string
     */
    static String getOmitNullValueString() {
        return TWELVE_SPACE_INDENTATION + PERIOD + OMIT_NULL_VALUE_STRING + NEW_LINE;
    }

    /**
     * Returns to string method's close string.
     *
     * @return to string method close string
     */
    static String getToStringMethodClose() {
        return TWELVE_SPACE_INDENTATION + PERIOD + TO + STRING_DATA_TYPE + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns to string method for class.
     *
     * @param attr attribute info
     * @return to string method
     */
    public static String getToStringMethod(JavaAttributeInfo attr) {

        String attributeName = attr.getAttributeName();
        return TWELVE_SPACE_INDENTATION + PERIOD + ADD_STRING + OPEN_PARENTHESIS + QUOTES + attributeName + QUOTES
                + COMMA + SPACE + attributeName + CLOSE_PARENTHESIS;
    }

    /**
     * Returns from string method's open string.
     *
     * @param className    name of the class
     * @param pluginConfig plugin configurations
     * @return from string method's open string
     */
    static String getFromStringMethodSignature(String className, YangPluginConfig pluginConfig) {
        return getJavaDoc(FROM_METHOD, className, false, pluginConfig, null) + FOUR_SPACE_INDENTATION + PUBLIC + SPACE
                + STATIC + SPACE + className + SPACE + FROM_STRING_METHOD_NAME + OPEN_PARENTHESIS
                + STRING_DATA_TYPE + SPACE + FROM_STRING_PARAM_NAME + CLOSE_PARENTHESIS + SPACE
                + OPEN_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Return from string method's close string.
     *
     * @return from string method's close string
     */
    static String getFromStringMethodClose() {
        return EIGHT_SPACE_INDENTATION + RETURN + SPACE + NULL + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Return from string method's body string.
     *
     * @param attr                    attribute info
     * @param fromStringAttributeInfo attribute info for the from string wrapper type
     * @return from string method's body string
     */
    public static String getFromStringMethod(JavaAttributeInfo attr,
                                             JavaAttributeInfo fromStringAttributeInfo) {
        return EIGHT_SPACE_INDENTATION + getTrySubString() + NEW_LINE + TWELVE_SPACE_INDENTATION
                + getParsedSubString(attr, fromStringAttributeInfo) + NEW_LINE + TWELVE_SPACE_INDENTATION
                + getReturnOfSubString() + NEW_LINE + EIGHT_SPACE_INDENTATION + getCatchSubString()
                + NEW_LINE + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns sub string with try statement for union's from string method.
     *
     * @return sub string with try statement for union's from string method
     */
    private static String getTrySubString() {
        return TRY + SPACE + OPEN_CURLY_BRACKET;
    }

    /**
     * Returns sub string with return statement for union's from string method.
     *
     * @return sub string with return statement for union's from string method
     */
    private static String getReturnOfSubString() {
        return RETURN + SPACE + OF + OPEN_PARENTHESIS + TMP_VAL + CLOSE_PARENTHESIS + SEMI_COLAN;
    }

    /**
     * Returns sub string with catch statement for union's from string method.
     *
     * @return sub string with catch statement for union's from string method
     */
    private static String getCatchSubString() {
        return CLOSE_CURLY_BRACKET + SPACE + CATCH + SPACE + OPEN_PARENTHESIS + EXCEPTION + SPACE + EXCEPTION_VAR
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET;
    }

    /**
     * Returns sub string with parsed statement for union's from string method.
     *
     * @param attr attribute info
     * @return sub string with parsed statement for union's from string method
     */
    private static String getParsedSubString(JavaAttributeInfo attr,
                                             JavaAttributeInfo fromStringAttributeInfo) {
        String targetDataType = getReturnType(attr);
        if (fromStringAttributeInfo.getAttributeType().getDataType() == BITS) {
            String lines = targetDataType + SPACE + TMP_VAL + SPACE + EQUAL + SPACE + NEW + SPACE + targetDataType
                    + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += TWELVE_SPACE_INDENTATION + FROM_STRING_PARAM_NAME + SPACE + EQUAL + SPACE + FROM_STRING_PARAM_NAME
                    + PERIOD + REPLACE_STRING + OPEN_PARENTHESIS + SINGLE_QUOTE + OPEN_CURLY_BRACKET + SINGLE_QUOTE
                    + COMMA + SPACE + SINGLE_QUOTE + SPACE + SINGLE_QUOTE + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += TWELVE_SPACE_INDENTATION + FROM_STRING_PARAM_NAME + SPACE + EQUAL + SPACE + FROM_STRING_PARAM_NAME
                    + PERIOD + REPLACE_STRING + OPEN_PARENTHESIS + SINGLE_QUOTE + CLOSE_CURLY_BRACKET + SINGLE_QUOTE
                    + COMMA + SPACE + SINGLE_QUOTE + SPACE + SINGLE_QUOTE + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += TWELVE_SPACE_INDENTATION + FROM_STRING_PARAM_NAME + SPACE + EQUAL + SPACE + FROM_STRING_PARAM_NAME
                    + PERIOD + TRIM_STRING + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += TWELVE_SPACE_INDENTATION + STRING_DATA_TYPE + SQUARE_BRACKETS + SPACE + BITS_STRING_ARRAY_VAR
                    + SPACE + EQUAL + SPACE + FROM_STRING_PARAM_NAME + PERIOD + SPLIT_STRING + OPEN_PARENTHESIS
                    + QUOTES + COMMA + QUOTES + COMMA + SPACE + ZERO + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += TWELVE_SPACE_INDENTATION + FOR + SPACE + OPEN_PARENTHESIS + STRING_DATA_TYPE + SPACE
                    + BIT_TEMP_VAR + SPACE + COLON + SPACE + BITS_STRING_ARRAY_VAR + CLOSE_PARENTHESIS + SPACE
                    + OPEN_CURLY_BRACKET + NEW_LINE;
            lines += SIXTEEN_SPACE_INDENTATION + BIT_TEMP_VAR + SPACE + EQUAL + SPACE + BIT_TEMP_VAR + PERIOD
                    + TRIM_STRING + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += SIXTEEN_SPACE_INDENTATION + TMP_VAL + PERIOD + SET_METHOD_PREFIX + OPEN_PARENTHESIS
                    + INTEGER_WRAPPER + PERIOD + PARSE_INT + OPEN_PARENTHESIS + BIT_TEMP_VAR + CLOSE_PARENTHESIS
                    + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
            lines += TWELVE_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
            return lines;
        } else if (attr.getAttributeType().getDataType() == BINARY) {
            return targetDataType + SPACE + TMP_VAL + SPACE + EQUAL + SPACE + BASE64 + PERIOD
                    + GET_DECODER + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + PERIOD + DECODE + OPEN_PARENTHESIS
                    + FROM_STRING_PARAM_NAME + CLOSE_PARENTHESIS + SEMI_COLAN;
        } else {
            String parseFromStringMethod = getParseFromStringMethod(targetDataType,
                    fromStringAttributeInfo.getAttributeType());
            return targetDataType + SPACE + TMP_VAL + SPACE + EQUAL + SPACE + parseFromStringMethod
                    + OPEN_PARENTHESIS + FROM_STRING_PARAM_NAME + CLOSE_PARENTHESIS + SEMI_COLAN;
        }
    }

    /**
     * Returns hash code method open strings.
     *
     * @return hash code method open string
     */
    static String getHashCodeMethodOpen() {
        return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + INT + SPACE + HASH_CODE_STRING
                + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE +
                EIGHT_SPACE_INDENTATION
                + RETURN + SPACE + OBJECT_STRING + SUFFIX_S + PERIOD + HASH + OPEN_PARENTHESIS;
    }

    /**
     * Returns hash code methods close string.
     *
     * @param hashcodeString hash code string
     * @return to hash code method close string
     */
    static String getHashCodeMethodClose(String hashcodeString) {
        hashcodeString = trimAtLast(hashcodeString, COMMA);
        hashcodeString = trimAtLast(hashcodeString, SPACE);
        return hashcodeString + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET
                + NEW_LINE;
    }

    /**
     * Returns hash code method for class.
     *
     * @param attr attribute info
     * @return hash code method
     */
    public static String getHashCodeMethod(JavaAttributeInfo attr) {
        return attr.getAttributeName() + COMMA + SPACE;
    }

    /**
     * Returns equals method open strings.
     *
     * @param className class name
     * @return equals method open string
     */
    static String getEqualsMethodOpen(String className) {
        return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + BOOLEAN_DATA_TYPE + SPACE +
                EQUALS_STRING
                + OPEN_PARENTHESIS + OBJECT_STRING + SPACE + OBJ + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET
                + NEW_LINE + getEqualsMethodsCommonIfCondition() + getEqualsMethodsSpecificIfCondition(className);
    }

    /**
     * Returns equal methods if condition string.
     *
     * @return if condition string
     */
    private static String getEqualsMethodsCommonIfCondition() {
        return EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + THIS + SPACE + EQUAL + EQUAL + SPACE + OBJ
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION + RETURN + SPACE
                + TRUE + SEMI_COLAN + NEW_LINE + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns if condition for specific class object in equals method.
     *
     * @param className class name
     * @return if condition string
     */
    private static String getEqualsMethodsSpecificIfCondition(String className) {
        return EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + OBJ + INSTANCE_OF + className
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION + className
                + SPACE + OTHER + SPACE + EQUAL + SPACE + OPEN_PARENTHESIS + className + CLOSE_PARENTHESIS + SPACE
                + OBJ + SEMI_COLAN + NEW_LINE + TWELVE_SPACE_INDENTATION + RETURN + NEW_LINE;
    }

    /**
     * Returns equals methods close string.
     *
     * @param equalMethodString equal method string
     * @return equals method close string
     */
    static String getEqualsMethodClose(String equalMethodString) {
        equalMethodString = trimAtLast(equalMethodString, AND);
        equalMethodString = trimAtLast(equalMethodString, AND);
        equalMethodString = trimAtLast(equalMethodString, SPACE);
        equalMethodString = trimAtLast(equalMethodString, NEW_LINE) + SEMI_COLAN + NEW_LINE;
        return equalMethodString + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION
                + RETURN + SPACE + FALSE + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET
                + NEW_LINE;
    }

    /**
     * Returns equals method for class.
     *
     * @param attr attribute info
     * @return equals method
     */
    public static String getEqualsMethod(JavaAttributeInfo attr) {
        String attributeName = attr.getAttributeName();
        return SIXTEEN_SPACE_INDENTATION + SPACE + OBJECT_STRING + SUFFIX_S + PERIOD + EQUALS_STRING + OPEN_PARENTHESIS
                + attributeName + COMMA + SPACE + OTHER + PERIOD + attributeName + CLOSE_PARENTHESIS + SPACE + AND
                + AND;
    }

    /**
     * Returns of method string for class.
     *
     * @param name class name
     * @param attr attribute info
     * @return of method string
     */
    static String getOfMethod(String name, JavaAttributeInfo attr) {
        String attrQualifiedType = getReturnType(attr);
        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STATIC + SPACE + name + SPACE + OF + OPEN_PARENTHESIS
                + attrQualifiedType + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE + name + OPEN_PARENTHESIS + VALUE
                + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns of method's string and java doc for special type.
     *
     * @param attr                   attribute info
     * @param generatedJavaClassName class name
     * @param pluginConfig           plugin configurations
     * @return of method's string and java doc for special type
     */
    public static String getOfMethodStringAndJavaDoc(JavaAttributeInfo attr, String generatedJavaClassName,
                                                     YangPluginConfig pluginConfig) {
        String attrType = getReturnType(attr);
        String attrName = attr.getAttributeName();

        return getJavaDoc(OF_METHOD, generatedJavaClassName + " for type " + attrName, false, pluginConfig, null)
                + getOfMethodString(attrType, generatedJavaClassName);
    }

    /**
     * Returns of method's string.
     *
     * @param type      data type
     * @param className class name
     * @return of method's string
     */
    private static String getOfMethodString(String type, String className) {
        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STATIC + SPACE + className + SPACE + OF + OPEN_PARENTHESIS
                + type + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE + className + OPEN_PARENTHESIS + VALUE
                + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns string and java doc for constructor of type class.
     *
     * @param attr                   attribute info
     * @param generatedJavaClassName class name
     * @param pluginConfig           plugin configurations
     * @return string and java doc for constructor of type class
     */
    public static String getTypeConstructorStringAndJavaDoc(JavaAttributeInfo attr,
                                                            String generatedJavaClassName,
                                                            YangPluginConfig pluginConfig) {
        String attrType = getReturnType(attr);
        String attrName = attr.getAttributeName();
        return getJavaDoc(TYPE_CONSTRUCTOR, generatedJavaClassName + " for type " + attrName, false, pluginConfig, null)
                + getTypeConstructorString(attrType, attrName, generatedJavaClassName);
    }

    /**
     * Returns string and java doc for constructor of type class.
     *
     * @param attr1                  first attribute info
     * @param attr2                  second attribute info
     * @param generatedJavaClassName class name
     * @param pluginConfig           plugin config
     * @param type                   conflict validate type
     * @param addFirst               whether int came first or uInt came first
     * @return string and java doc for constructor of type class
     */
    public static String getTypeConstructorStringAndJavaDoc(JavaAttributeInfo attr1, JavaAttributeInfo
            attr2, String generatedJavaClassName, YangPluginConfig pluginConfig, ValidatorTypeForUnionTypes type,
                                                            boolean addFirst) {
        String attrType = getReturnType(attr1);
        String attrName1 = "";
        String attrName2 = "";
        if (attr1 != null) {
            attrName1 = attr1.getAttributeName();
        }
        if (attr2 != null) {
            attrName2 = attr2.getAttributeName();
        }

        String appDataStructure = null;
        if (attr1.getCompilerAnnotation() != null) {
            appDataStructure = attr1.getCompilerAnnotation().getYangAppDataStructure().getDataStructure().name();
        }
        return getJavaDoc(TYPE_CONSTRUCTOR, generatedJavaClassName + " for type " + attrName1, false, pluginConfig,
                appDataStructure) + getTypeConstructorString(attrType, attrName1,
                attrName2, generatedJavaClassName, type, addFirst);
    }

    /**
     * Returns type constructor string.
     *
     * @param type      data type
     * @param name      attribute name
     * @param className class name
     * @return type constructor string
     */
    private static String getTypeConstructorString(String type, String name, String className) {
        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + className + OPEN_PARENTHESIS + type + SPACE + VALUE
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + THIS + PERIOD
                + name + SPACE + EQUAL + SPACE + VALUE + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns type constructor string.
     *
     * @param type      data type
     * @param attr1     attribute attr1
     * @param className class attr1
     * @return type constructor string
     */
    private static String getTypeConstructorString(String type, String attr1, String attr2, String className,
                                                   ValidatorTypeForUnionTypes validatorType, boolean addInt) {
        String constructor;
        constructor = FOUR_SPACE_INDENTATION + PUBLIC + SPACE + className + OPEN_PARENTHESIS + type + SPACE + VALUE
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;

        String name1;
        String name2;
        if (addInt) {
            name1 = attr1;
            name2 = attr2;
        } else {
            name1 = attr2;
            name2 = attr1;
        }
        constructor = constructor + ifConditionForIntInTypeDefConstructor(validatorType, addInt) +
                TWELVE_SPACE_INDENTATION + THIS + PERIOD
                + name1 + SPACE + EQUAL + SPACE + VALUE + SEMI_COLAN + NEW_LINE + EIGHT_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET + SPACE + ELSE + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION
                + THIS + PERIOD
                + name2 + SPACE + EQUAL + SPACE + VALUE + SEMI_COLAN + NEW_LINE + EIGHT_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET + NEW_LINE + FOUR_SPACE_INDENTATION
                + CLOSE_CURLY_BRACKET;

        return constructor;
    }

    /**
     * Returns interface of add augmentation.
     *
     * @return interface of add augmentation
     */
    static String getAddAugmentInfoMethodInterface() {
        return generateForAddAugmentation() + FOUR_SPACE_INDENTATION + VOID + SPACE +
                ADD_STRING + YANG_AUGMENTED_INFO + OPEN_PARENTHESIS + OBJECT_STRING + SPACE + VALUE + COMMA +
                SPACE + CLASS_STRING + SPACE + CLASS + OBJECT_STRING + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns implementation of add augmentation.
     *
     * @return implementation of add augmentation
     */
    static String getAddAugmentInfoMethodImpl() {
        return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE +
                ADD_STRING + YANG_AUGMENTED_INFO + OPEN_PARENTHESIS + OBJECT_STRING + SPACE + VALUE + COMMA +
                SPACE + CLASS_STRING + SPACE + CLASS + OBJECT_STRING + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET +
                NEW_LINE + EIGHT_SPACE_INDENTATION + getSmallCase(YANG_AUGMENTED_INFO) + MAP + PERIOD + PUT +
                OPEN_PARENTHESIS + CLASS + OBJECT_STRING + COMMA + SPACE + VALUE +
                CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns interface of get YANG augment info.
     *
     * @return interface of get YANG augment info
     */
    static String getYangAugmentInfoInterface() {
        return generateForGetAugmentation() + FOUR_SPACE_INDENTATION + OBJECT_STRING + SPACE +
                getSmallCase(YANG_AUGMENTED_INFO) + OPEN_PARENTHESIS + CLASS_STRING + SPACE + CLASS + OBJECT_STRING +
                CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns implementation of get YANG augment info.
     *
     * @return implementation of get YANG augment info
     */
    static String getYangAugmentInfoImpl() {
        return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE +
                OBJECT_STRING + SPACE +
                getSmallCase(YANG_AUGMENTED_INFO) + OPEN_PARENTHESIS + CLASS_STRING + SPACE + CLASS + OBJECT_STRING +
                CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION +
                RETURN + SPACE + getSmallCase(YANG_AUGMENTED_INFO) + MAP + PERIOD + GET + OPEN_PARENTHESIS + CLASS +
                OBJECT_STRING + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns implementation of get YANG augment info.
     *
     * @return implementation of get YANG augment info
     */
    static String getYangAugmentInfoMapInterface(YangPluginConfig pluginConfig) {
        return getJavaDoc(GETTER_METHOD, getSmallCase(YANG_AUGMENTED_INFO) + MAP, false, pluginConfig, null)
                + FOUR_SPACE_INDENTATION + MAP + DIAMOND_OPEN_BRACKET + CLASS_STRING + DIAMOND_OPEN_BRACKET +
                QUESTION_MARK + DIAMOND_CLOSE_BRACKET + COMMA + SPACE + OBJECT_STRING + DIAMOND_CLOSE_BRACKET +
                SPACE + getSmallCase(YANG_AUGMENTED_INFO) + MAP + OPEN_PARENTHESIS +
                CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns implementation of get YANG augment info.
     *
     * @return implementation of get YANG augment info
     */
    static String getYangAugmentInfoMapImpl() {
        return getOverRideString()
                + FOUR_SPACE_INDENTATION + PUBLIC + SPACE +
                MAP + DIAMOND_OPEN_BRACKET + CLASS_STRING + DIAMOND_OPEN_BRACKET + QUESTION_MARK +
                DIAMOND_CLOSE_BRACKET + COMMA + SPACE + OBJECT_STRING + DIAMOND_CLOSE_BRACKET + SPACE +
                getSmallCase(YANG_AUGMENTED_INFO) + MAP + OPEN_PARENTHESIS +
                CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION +
                RETURN + SPACE + getSmallCase(YANG_AUGMENTED_INFO) + MAP + SEMI_COLAN + NEW_LINE
                + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns enum's constructor.
     *
     * @param className enum's class name
     * @return enum's constructor
     */
    static String getEnumsConstructor(String className) {
        return FOUR_SPACE_INDENTATION + className + OPEN_PARENTHESIS + INT + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE
                + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + getSmallCase(className) + SPACE + EQUAL
                + SPACE + VALUE + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns of method for enum class.
     *
     * @param className    class name
     * @param attr         java attribute
     * @param enumMap      enum's sets map
     * @param enumList     enum's sets list
     * @param pluginConfig plugin configurations
     * @return of method
     */
    static String getEnumsOfMethod(String className, JavaAttributeInfo attr,
                                   Map<String, Integer> enumMap, List<String> enumList,
                                   YangPluginConfig pluginConfig) {
        String attrType = getReturnType(attr);
        String attrName = attr.getAttributeName();

        String method = FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STATIC + SPACE + getCapitalCase(className) + SPACE
                + OF + OPEN_PARENTHESIS
                + attrType + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                + EIGHT_SPACE_INDENTATION + SWITCH + SPACE + OPEN_PARENTHESIS + VALUE
                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
        int value;
        for (String str : enumList) {
            value = enumMap.get(str);
            method = method + TWELVE_SPACE_INDENTATION + CASE + SPACE + value + COLON + NEW_LINE
                    + SIXTEEN_SPACE_INDENTATION + RETURN + SPACE + getCapitalCase(className) + PERIOD
                    + str + SEMI_COLAN + NEW_LINE;
        }
        method = method + TWELVE_SPACE_INDENTATION + DEFAULT + SPACE + COLON + NEW_LINE + SIXTEEN_SPACE_INDENTATION
                + RETURN + SPACE + NULL + SEMI_COLAN + NEW_LINE + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET
                + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;

        return getJavaDoc(OF_METHOD, getCapitalCase(className) + " for type " + attrName, false, pluginConfig, null)
                + method;
    }

    /**
     * Returns from string method parsed string.
     *
     * @param targetDataType target data type
     * @param yangType       YANG type
     * @return parsed string
     */
    private static String getParseFromStringMethod(String targetDataType, YangType<?> yangType) {
        YangDataTypes type = yangType.getDataType();

        switch (type) {
            case INT8:
                return BYTE_WRAPPER + PERIOD + PARSE_BYTE;
            case INT16:
                return SHORT_WRAPPER + PERIOD + PARSE_SHORT;
            case INT32:
                return INTEGER_WRAPPER + PERIOD + PARSE_INT;
            case INT64:
                return LONG_WRAPPER + PERIOD + PARSE_LONG;
            case UINT8:
                return SHORT_WRAPPER + PERIOD + PARSE_SHORT;
            case UINT16:
                return INTEGER_WRAPPER + PERIOD + PARSE_INT;
            case UINT32:
                return LONG_WRAPPER + PERIOD + PARSE_LONG;
            case UINT64:
                return NEW + SPACE + BIG_INTEGER;
            case DECIMAL64:
                return NEW + SPACE + BIG_DECIMAL;
            case STRING:
            case IDENTITYREF:
                return EMPTY_STRING;
            case EMPTY:
            case BOOLEAN:
                return BOOLEAN_WRAPPER + PERIOD + PARSE_BOOLEAN;
            case BITS:
            case UNION:
            case ENUMERATION:
            case DERIVED:
                return targetDataType + PERIOD + FROM_STRING_METHOD_NAME;
            default:
                throw new TranslatorException("given data type is not supported.");
        }
    }

    /**
     * Returns augmented data getter and setter methods for service class.
     *
     * @param parent parent node
     * @return augmented data getter and setter methods for service class
     */
    static String getAugmentsDataMethodForService(YangNode parent) {
        List<YangAtomicPath> targets = getSetOfNodeIdentifiers(parent);
        YangNode augmentedNode;
        String curNodeName;
        String method;
        StringBuilder methods = new StringBuilder();
        String parentName;
        String returnType;
        YangNode methodNode;
        YangPluginConfig pluginConfig = ((JavaFileInfoContainer) parent).getJavaFileInfo().getPluginConfig();
        for (YangAtomicPath nodeId : targets) {
            augmentedNode = nodeId.getResolvedNode().getParent();
            methodNode = nodeId.getResolvedNode();
            if (((JavaFileInfoContainer) methodNode).getJavaFileInfo().getJavaName() != null) {
                curNodeName = ((JavaFileInfoContainer) methodNode).getJavaFileInfo().getJavaName();
            } else {
                curNodeName = getCapitalCase(getCamelCase(methodNode.getName(), pluginConfig
                        .getConflictResolver()));
            }
            returnType = getAugmentedClassNameForDataMethods(augmentedNode, parent);
            parentName = getParentNodeNameForDataMethods(augmentedNode, pluginConfig);
            method = generateForGetMethodWithAttribute(returnType)
                    + getGetMethodWithArgument(returnType, AUGMENTED + parentName
                    + getCapitalCase(curNodeName)) + NEW_LINE;
            methods.append(method);

            method = getJavaDoc(MANAGER_SETTER_METHOD, AUGMENTED +
                    getCapitalCase(parentName) + getCapitalCase(curNodeName), false, pluginConfig, null) +
                    getSetterForInterface(getSmallCase(AUGMENTED) + parentName +
                                    getCapitalCase(curNodeName), returnType, parentName, false,
                            GENERATE_SERVICE_AND_MANAGER, null) + NEW_LINE;
            methods.append(method);
        }
        return methods.toString();
    }

    /**
     * Returns validator method for range in union class.
     *
     * @param type type
     * @return validator method for range in union class
     */
    static String getRangeValidatorMethodForUnion(String type) {
        String newType;
        if (type.contentEquals(BIG_INTEGER)) {
            newType = LONG;
        } else {
            newType = INT;
        }
        String method = generateForValidatorMethod() + FOUR_SPACE_INDENTATION + PRIVATE + SPACE + BOOLEAN_DATA_TYPE +
                SPACE +
                VALIDATE_RANGE +
                OPEN_PARENTHESIS
                + type + SPACE + MIN_RANGE + COMMA + SPACE + type + SPACE + MAX_RANGE + COMMA + SPACE +
                newType + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
        if (type.contentEquals(BIG_INTEGER)) {
            method = method + EIGHT_SPACE_INDENTATION + BIG_INTEGER + SPACE + getSmallCase(BIG_INTEGER)
                    + SPACE + EQUAL + SPACE + NEW + SPACE + BIG_INTEGER + OPEN_PARENTHESIS + QUOTES + SPACE +
                    QUOTES + SPACE + ADD + SPACE + VALUE + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE +
                    EIGHT_SPACE_INDENTATION + RETURN + SPACE + getSmallCase(BIG_INTEGER) + PERIOD + "compareTo"
                    + OPEN_PARENTHESIS + MIN_RANGE + CLOSE_PARENTHESIS + SPACE + EQUAL + EQUAL + " 1" + SPACE + AND +
                    AND + SPACE + getSmallCase(BIG_INTEGER) + PERIOD + "compareTo" + OPEN_PARENTHESIS + MAX_RANGE +
                    CLOSE_PARENTHESIS + SPACE + EQUAL + EQUAL + " 1" + SEMI_COLAN + NEW_LINE;
        } else {
            method = method + EIGHT_SPACE_INDENTATION
                    + RETURN + SPACE + VALUE + SPACE + DIAMOND_CLOSE_BRACKET + EQUAL + SPACE + MIN_RANGE + SPACE + AND +
                    AND + SPACE + VALUE + DIAMOND_OPEN_BRACKET + EQUAL + SPACE + MAX_RANGE + SEMI_COLAN + NEW_LINE;
        }
        return method + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns if condition string for typedef constructor.
     *
     * @param type     type of conflict
     * @param addFirst true int/long need to be added first
     * @return if condition string for typedef constructor
     */
    private static String ifConditionForIntInTypeDefConstructor(ValidatorTypeForUnionTypes type, boolean addFirst) {
        String condition = EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + VALIDATE_RANGE + OPEN_PARENTHESIS;

        if (type == INT_TYPE_CONFLICT) {
            if (addFirst) {
                condition = condition + INT_MIN_RANGE + COMMA + SPACE + INT_MAX_RANGE + COMMA + SPACE + VALUE;
            } else {
                condition = condition + UINT_MIN_RANGE + COMMA + SPACE + UINT_MAX_RANGE + COMMA + SPACE + VALUE;
            }
        } else {
            if (addFirst) {
                condition = condition + LONG_MIN_RANGE + COMMA + SPACE + LONG_MAX_RANGE + COMMA + SPACE + VALUE;
            } else {
                condition = condition + ULONG_MIN_RANGE + COMMA + SPACE + ULONG_MAX_RANGE + COMMA + SPACE + VALUE;
            }
        }
        return condition + CLOSE_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
    }

    //Get method with arguments.
    private static String getGetMethodWithArgument(String returnType, String yangName) {
        return FOUR_SPACE_INDENTATION + returnType + SPACE + GET_METHOD_PREFIX + getCapitalCase(yangName)
                + OPEN_PARENTHESIS + returnType + OP_PARAM + SPACE + getSmallCase(returnType) + CLOSE_PARENTHESIS +
                SEMI_COLAN;
    }

    /**
     * Returns add to list method interface.
     *
     * @param attr java attribute
     * @return add to list method interface
     */
    public static String getAddToListMethodInterface(JavaAttributeInfo attr) {
        return FOUR_SPACE_INDENTATION + VOID + SPACE + ADD_STRING + getCapitalCase(TO) +
                getCapitalCase(attr.getAttributeName()) + OPEN_PARENTHESIS + getReturnType(attr) + SPACE +
                VALUE + CLOSE_PARENTHESIS + SEMI_COLAN;
    }

    /**
     * Returns add to list method impl.
     *
     * @param attr java attribute
     * @return add to list method impl
     */
    public static String getAddToListMethodImpl(JavaAttributeInfo attr) {
        return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + ADD_STRING +
                getCapitalCase(TO) + getCapitalCase(attr.getAttributeName()) + OPEN_PARENTHESIS +
                getReturnType(attr) + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET
                + NEW_LINE + EIGHT_SPACE_INDENTATION + attr.getAttributeName() + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                + PERIOD + ADD_STRING + OPEN_PARENTHESIS + VALUE + CLOSE_PARENTHESIS + SEMI_COLAN +
                NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns builder method for class.
     *
     * @param name name of class
     * @return builder method for class
     */
    static String builderMethod(String name) {
        return NEW_LINE + generateForBuilderMethod(name) + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STATIC + SPACE
                + name + BUILDER + SPACE + getSmallCase(BUILDER) + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE +
                OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE + name +
                BUILDER + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION +
                CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns is filter content match interface.
     *
     * @param name name of node
     * @return is filter content match interface
     */
    static String isFilterContentMatchInterface(String name) {
        String method = "    /**\n" +
                "     * Checks if the passed " + name + " maps the content match query condition.\n" +
                "     *\n" +
                "     * @param " + getSmallCase(name) + SPACE + getSmallCase(name) + SPACE + "being passed to check" +
                " for" +
                " content match\n" +
                "     * @return match result\n" +
                "     */\n";
        return method + FOUR_SPACE_INDENTATION + BOOLEAN_DATA_TYPE + SPACE + FILTER_CONTENT_MATCH + OPEN_PARENTHESIS
                + name + SPACE + getSmallCase(name) + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns is value set interface.
     *
     * @return is value set interface
     */
    static String isLeafValueSetInterface() {
        String method = "    /**\n" +
                "     * Checks if the leaf value is set.\n" +
                "     *\n" +
                "     * @param leaf leaf whose value status needs to checked\n" +
                "     * @return result of leaf value set in object\n" +
                "     */\n";
        return method + FOUR_SPACE_INDENTATION + BOOLEAN_DATA_TYPE + SPACE + VALUE_LEAF_SET + OPEN_PARENTHESIS
                + LEAF_IDENTIFIER + SPACE + "leaf" + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns is select leaf set interface.
     *
     * @return is select leaf set interface
     */
    static String isSelectLeafSetInterface() {
        String method = "    /**\n" +
                "     * Checks if the leaf is set to be a selected leaf.\n" +
                "     *\n" +
                "     * @param leaf if leaf needs to be selected\n" +
                "     * @return result of leaf value set in object\n" +
                "     */\n";
        return method + FOUR_SPACE_INDENTATION + BOOLEAN_DATA_TYPE + SPACE + IS_SELECT_LEAF + OPEN_PARENTHESIS
                + LEAF_IDENTIFIER + SPACE + "leaf" + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns set select leaf set interface.
     *
     * @param name node name
     * @return set select leaf set interface
     */
    static String setSelectLeafSetInterface(String name) {
        String method = "    /**\n" +
                "     * Set a leaf to be selected.\n" +
                "     *\n" +
                "     * @param leaf leaf needs to be selected\n" +
                "     */\n";
        return method + FOUR_SPACE_INDENTATION + name + BUILDER + SPACE + SET_SELECT_LEAF + OPEN_PARENTHESIS
                + LEAF_IDENTIFIER + SPACE + "leaf" + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns leaf identifier interface enum signature.
     *
     * @param name name of node
     * @return leaf identifier interface enum signature
     */
    static String getInterfaceLeafIdEnumSignature(String name) {
        String start = "    /**\n" +
                "     * Identify the leaf of " + name + PERIOD + NEW_LINE +
                "     */\n";
        return start + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + ENUM + SPACE + LEAF_IDENTIFIER + SPACE +
                OPEN_CURLY_BRACKET + NEW_LINE;
    }

    /**
     * Returns interface leaf identifier enum method.
     *
     * @return interface leaf identifier enum method
     */
    static String getInterfaceLeafIdEnumMethods() {
        return "        private int leafIndex;\n" +
                "\n" +
                "        public int getLeafIndex() {\n" +
                "            return leafIndex;\n" +
                "        }\n" +
                "\n" +
                "        LeafIdentifier(int value) {\n" +
                "            this.leafIndex = value;\n" +
                "        }\n" +
                "    }\n";
    }

    /**
     * Returns getter methods for operation attributes.
     *
     * @return getter methods for operation attributes
     */
    static String getOperationAttributesGetters() {
        return "\n" +
                "    /**\n" +
                "     * Returns the valueLeafFlags.\n" +
                "     *\n" +
                "     * @return value of valueLeafFlags\n" +
                "     */\n" +
                "    public BitSet getValueLeafFlags() {\n" +
                "        return valueLeafFlags;\n" +
                "    }\n" +
                "\n" +
                "    /**\n" +
                "     * Returns the selectLeafFlags.\n" +
                "     *\n" +
                "     * @return value of selectLeafFlags\n" +
                "     */\n" +
                "    public BitSet getSelectLeafFlags() {\n" +
                "        return selectLeafFlags;\n" +
                "    }\n" +
                "\n";
    }

    /**
     * Returns getter for operation type.
     *
     * @return getter for operation type
     */
    static String getGetterForOperationType() {
        return "    /**\n" +
                "     * Returns the operationType.\n" +
                "     *\n" +
                "     * @return value of operationType\n" +
                "     */\n" +
                "    public OperationType getOperationType() {\n" +
                "        return operationType;\n" +
                "    }\n";
    }

    /**
     * Returns getters for value and select leaf.
     *
     * @return getters for value and select leaf
     */
    static String getGettersForValueAndSelectLeaf() {
        return "\n" +
                "    @Override\n" +
                "    public boolean isLeafValueSet(LeafIdentifier leaf) {\n" +
                "        return getValueLeafFlags().get(leaf.getLeafIndex());\n" +
                "    }\n" +
                "\n" +
                "    @Override\n" +
                "    public boolean isSelectLeaf(LeafIdentifier leaf) {\n" +
                "        return getSelectLeafFlags().get(leaf.getLeafIndex());\n" +
                "    }\n";
    }

    /**
     * Returns setter for operation type.
     *
     * @param name name of node
     * @return setter for operation type
     */
    static String getSetterForOperationType(String name) {
        return "    /**\n" +
                "     * Set operation type.\n" +
                "     *\n" +
                "     * @param operationType operation type\n" +
                "     */\n" +
                "    public " + name + BUILDER + " setOperationType(OperationType operationType) {\n" +
                "       this.operationType = operationType;\n" +
                "       return this;\n" +
                "    }\n";
    }

    /**
     * Returns setter for select leaf.
     *
     * @param name       name of node
     * @param isRootNode if root node
     * @return setter for select leaf
     */
    static String getSetterForSelectLeaf(String name, boolean isRootNode) {
        String append = OVERRIDE;
        if (isRootNode) {
            append = EMPTY_STRING;
        }
        return "\n" +
                "    " + append + "\n" +
                "    public " + name + BUILDER + " selectLeaf(LeafIdentifier leaf) {\n" +
                "        getSelectLeafFlags().set(leaf.getLeafIndex());\n" +
                "        return this;\n" +
                "    }\n";
    }

    private static String getListAttribute(String attrType, YangCompilerAnnotation compilerAnnotation) {
        String listAttr;
        if (compilerAnnotation != null && compilerAnnotation.getYangAppDataStructure() != null) {
            switch (compilerAnnotation.getYangAppDataStructure().getDataStructure()) {
                case QUEUE: {
                    listAttr = QUEUE + DIAMOND_OPEN_BRACKET + attrType + DIAMOND_CLOSE_BRACKET;
                    break;
                }
                case SET: {
                    listAttr = SET + DIAMOND_OPEN_BRACKET + attrType + DIAMOND_CLOSE_BRACKET;
                    break;
                }
                case LIST: {
                    listAttr = getListString() + attrType + DIAMOND_CLOSE_BRACKET;
                    break;
                }
                default: {
                    listAttr = getListString() + attrType + DIAMOND_CLOSE_BRACKET;
                }
            }
        } else {
            listAttr = getListString() + attrType + DIAMOND_CLOSE_BRACKET;
        }
        return listAttr;
    }
}