[ONOS-3908] YANG container translator.

Change-Id: I4e239509df747238905ca0995f41019679093627
diff --git a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java
new file mode 100644
index 0000000..e2d27ac
--- /dev/null
+++ b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2016 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 org.onosproject.yangutils.datamodel.YangDataTypes;
+import org.onosproject.yangutils.datamodel.YangType;
+import org.onosproject.yangutils.translator.tojava.AttributeInfo;
+import org.onosproject.yangutils.utils.UtilConstants;
+
+/**
+ * Provides java data types corresponding to YANG type.
+ */
+public final class AttributesJavaDataType {
+
+    /**
+     * Default constructor.
+     */
+    private AttributesJavaDataType() {
+    }
+
+    /**
+     * Returns YANG type.
+     *
+     * @param yangType YANG type
+     * @return YANG type
+     */
+    public static YangType<?> getJavaDataType(YangType<?> yangType) {
+        yangType.setDataTypeName(yangType.getDataTypeName().replace("\"", ""));
+        if (yangType.getDataType() != null) {
+            yangType.setDataTypeName(parseYangDataType(yangType.getDataType()));
+        }
+        return yangType;
+    }
+
+    /**
+     * Returns list string as attribute name when attribute is a list.
+     *
+     * @param attr attribute info.
+     * @return list attribute
+     */
+    @SuppressWarnings("rawtypes")
+    public static YangType<?> getListString(AttributeInfo attr) {
+        String listString = JavaCodeSnippetGen.getListAttribute(attr.getAttributeType().getDataTypeName());
+        YangType<?> type = new YangType();
+        type.setDataTypeName(listString);
+        attr.setAttributeType(type);
+        return type;
+    }
+
+    /**
+     * Parses YANG data type and returns corresponding java data type.
+     *
+     * @param type YANG data type
+     * @return java data type
+     */
+    private static String parseYangDataType(YangDataTypes type) {
+        if (type.equals(YangDataTypes.INT8)) {
+            return UtilConstants.BYTE;
+        } else if (type.equals(YangDataTypes.INT16)) {
+            return UtilConstants.SHORT;
+        } else if (type.equals(YangDataTypes.INT32)) {
+            return UtilConstants.INT;
+        } else if (type.equals(YangDataTypes.INT64)) {
+            return UtilConstants.LONG;
+        } else if (type.equals(YangDataTypes.UINT8)) {
+            return UtilConstants.SHORT;
+        } else if (type.equals(YangDataTypes.UINT16)) {
+            return UtilConstants.INT;
+        } else if (type.equals(YangDataTypes.UINT32)) {
+            return UtilConstants.LONG;
+        } else if (type.equals(YangDataTypes.UINT64)) {
+            //TODO: BIGINTEGER.
+        } else if (type.equals(YangDataTypes.DECIMAL64)) {
+            //TODO: DECIMAL64.
+        } else if (type.equals(YangDataTypes.STRING)) {
+            return UtilConstants.STRING;
+        } else if (type.equals(YangDataTypes.BOOLEAN)) {
+            return UtilConstants.BOOLEAN;
+        } else if (type.equals(YangDataTypes.ENUMERATION)) {
+            //TODO: ENUMERATION.
+        } else if (type.equals(YangDataTypes.BITS)) {
+            //TODO:BITS
+        } else if (type.equals(YangDataTypes.BINARY)) {
+            //TODO:BINARY
+        } else if (type.equals(YangDataTypes.LEAFREF)) {
+            //TODO:LEAFREF
+        } else if (type.equals(YangDataTypes.IDENTITYREF)) {
+            //TODO:IDENTITYREF
+        } else if (type.equals(YangDataTypes.EMPTY)) {
+            //TODO:EMPTY
+        } else if (type.equals(YangDataTypes.UNION)) {
+            //TODO:UNION
+        } else if (type.equals(YangDataTypes.INSTANCE_IDENTIFIER)) {
+            //TODO:INSTANCE_IDENTIFIER
+        } else if (type.equals(YangDataTypes.DERIVED)) {
+            //TODO:DERIVED
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java
index a470aef..e8bade3 100644
--- a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java
+++ b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java
@@ -16,9 +16,6 @@
 
 package org.onosproject.yangutils.translator.tojava.utils;
 
-import java.util.List;
-import java.util.SortedSet;
-
 import org.onosproject.yangutils.datamodel.YangType;
 import org.onosproject.yangutils.translator.GeneratedFileType;
 import org.onosproject.yangutils.translator.tojava.GeneratedMethodTypes;
@@ -50,17 +47,6 @@
     }
 
     /**
-     * reorder the import list based on the ONOS import rules.
-     *
-     * @param importInfo the set of classes/interfaces to be imported.
-     * @return string of import info.
-     */
-    public List<ImportInfo> sortImportOrder(SortedSet<ImportInfo> importInfo) {
-        /* TODO: reorder the import list based on the ONOS import rules. */
-        return null;
-    }
-
-    /**
      * Get the textual java code information corresponding to the import list.
      *
      * @param importInfo import info.
diff --git a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java
new file mode 100644
index 0000000..60d8c2a
--- /dev/null
+++ b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java
@@ -0,0 +1,453 @@
+/*
+ * Copyright 2016 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.io.File;
+import java.io.IOException;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.onosproject.yangutils.translator.GeneratedFileType;
+import org.onosproject.yangutils.translator.tojava.AttributeInfo;
+import org.onosproject.yangutils.utils.UtilConstants;
+import org.onosproject.yangutils.utils.io.impl.CopyrightHeader;
+import org.onosproject.yangutils.utils.io.impl.FileSystemUtil;
+import org.onosproject.yangutils.utils.io.impl.JavaDocGen;
+import org.onosproject.yangutils.utils.io.impl.TempDataStore;
+import org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType;
+import org.onosproject.yangutils.utils.io.impl.TempDataStore.TempDataStoreType;
+
+import static org.slf4j.LoggerFactory.getLogger;
+import org.slf4j.Logger;
+
+public final class JavaFileGenerator {
+
+    private static final Logger log = getLogger(JavaFileGenerator.class);
+
+    /**
+     * Default constructor.
+     */
+    private JavaFileGenerator() {
+    }
+
+    /**
+     * Returns generated interface file for current node.
+     * @param file file
+     * @param className class name
+     * @param imports imports for the file
+     * @param attrList attribute info
+     * @param pkg generated file package
+     * @return interface file
+     * @throws IOException when fails to write in file.
+     */
+    public static File generateInterfaceFile(File file, String className, List<String> imports,
+            List<AttributeInfo> attrList, String pkg) throws IOException {
+
+        initiateFile(file, className, GeneratedFileType.INTERFACE, imports, pkg);
+        List<String> methods = getMethodStrings(TempDataStoreType.GETTER_METHODS, GeneratedFileType.INTERFACE,
+                className, file, attrList);
+
+        /**
+         * Add getter methods to interface file.
+         */
+        for (String method : methods) {
+            appendMethod(file, method);
+        }
+        return file;
+    }
+
+    /**
+     * Return generated builder interface file for current node.
+     * @param file file
+     * @param className class name
+     * @param pkg generated file package
+     * @param attrList attribute info
+     * @return builder interface file
+     * @throws IOException when fails to write in file.
+     */
+    public static File generateBuilderInterfaceFile(File file, String className, String pkg,
+            List<AttributeInfo> attrList) throws IOException {
+
+        initiateFile(file, className, GeneratedFileType.BUILDER_INTERFACE, null, pkg);
+        List<String> methods = getMethodStrings(TempDataStoreType.BUILDER_INTERFACE_METHODS,
+                GeneratedFileType.BUILDER_INTERFACE, className, file, attrList);
+
+        /**
+         * Add build method to builder interface file.
+         */
+        methods.add(MethodsGenerator.parseBuilderInterfaceBuildMethodString(className));
+
+        /**
+         * Add getters and setters in builder interface.
+         */
+        for (String method : methods) {
+            appendMethod(file, UtilConstants.FOUR_SPACE_INDENTATION + method + UtilConstants.NEW_LINE);
+        }
+
+        insert(file, UtilConstants.CLOSE_CURLY_BRACKET + UtilConstants.NEW_LINE);
+        return file;
+    }
+
+    /**
+     * Returns generated builder class file for current node.
+     * @param file file
+     * @param className class name
+     * @param imports imports for the file
+     * @param pkg generated file package
+     * @param attrList attribute info
+     * @return builder class file
+     * @throws IOException when fails to write in file.
+     */
+    public static File generateBuilderClassFile(File file, String className, List<String> imports, String pkg,
+            List<AttributeInfo> attrList) throws IOException {
+
+        initiateFile(file, className, GeneratedFileType.BUILDER_CLASS, imports, pkg);
+        List<String> methods = getMethodStrings(TempDataStoreType.BUILDER_METHODS, GeneratedFileType.BUILDER_CLASS,
+                className, file, attrList);
+
+        /**
+         * Add default constructor and build method impl.
+         */
+        methods.add(UtilConstants.NEW_LINE + UtilConstants.FOUR_SPACE_INDENTATION + UtilConstants.JAVA_DOC_FIRST_LINE
+                + MethodsGenerator.getDefaultConstructorString(GeneratedFileType.BUILDER_CLASS, className));
+        methods.add(MethodsGenerator.getBuildString(className));
+
+        /**
+         * Add attribute strings.
+         */
+        addAttributeSring(file, className, attrList, GeneratedFileType.BUILDER_CLASS);
+
+        /**
+         * Add methods in builder class.
+         */
+        for (String method : methods) {
+            appendMethod(file, method + UtilConstants.NEW_LINE);
+        }
+        return file;
+    }
+
+    /**
+     * Returns generated impl class file for current node.
+     * @param file file
+     * @param className class name
+     * @param pkg generated file package
+     * @param attrList attribute's info
+     * @return impl class file
+     * @throws IOException when fails to write in file.
+     */
+    public static File generateImplClassFile(File file, String className, String pkg, List<AttributeInfo> attrList)
+            throws IOException {
+
+        initiateFile(file, className, GeneratedFileType.IMPL, null, pkg);
+        List<String> methods = getMethodStrings(TempDataStoreType.IMPL_METHODS, GeneratedFileType.IMPL, className, file,
+                attrList);
+
+        /**
+         * Add attributes.
+         */
+        addAttributeSring(file, className, attrList, GeneratedFileType.IMPL);
+
+        /**
+         * Add default constructor and constructor methods.
+         */
+        methods.add(UtilConstants.JAVA_DOC_FIRST_LINE
+                + MethodsGenerator.getDefaultConstructorString(GeneratedFileType.IMPL, className));
+        methods.add(MethodsGenerator.getConstructorString(className));
+
+        /**
+         * Add methods in impl class.
+         */
+        for (String method : methods) {
+            appendMethod(file, UtilConstants.FOUR_SPACE_INDENTATION + method + UtilConstants.NEW_LINE);
+        }
+        insert(file, UtilConstants.CLOSE_CURLY_BRACKET + UtilConstants.NEW_LINE);
+
+        return file;
+    }
+
+    /**
+     * Adds attribute string for generated files.
+     *
+     * @param className class name
+     * @param file generated file
+     * @param attrList attribute info
+     * @param genFileType generated file type
+     * @param IOException when fails to add attributes in files.
+     */
+    private static void addAttributeSring(File file, String className, List<AttributeInfo> attrList,
+            GeneratedFileType genFileType) throws IOException {
+        List<String> attributes = new LinkedList<>();
+        try {
+            attributes = TempDataStore.getTempData(TempDataStoreType.ATTRIBUTE, className);
+        } catch (ClassNotFoundException | IOException e) {
+            log.info("There is no attribute info of " + className + " YANG file in the serialized files.");
+        }
+
+        if (attrList != null) {
+            MethodsGenerator.setAttrInfo(attrList);
+            for (AttributeInfo attr : attrList) {
+                if (attr.isListAttr()) {
+                    attr.setAttributeType(AttributesJavaDataType.getListString(attr));
+                }
+                attributes.add(getAttributeString(attr, genFileType));
+            }
+        }
+
+        /**
+         * Add attributes to the file.
+         */
+        for (String attribute : attributes) {
+            insert(file, UtilConstants.NEW_LINE + UtilConstants.FOUR_SPACE_INDENTATION + attribute);
+        }
+        insert(file, UtilConstants.NEW_LINE);
+    }
+
+    /**
+     * Returns method strings for generated files.
+     *
+     * @param dataStoreType temp data store file type.
+     * @param genFileType generated file type
+     * @param className generated file name
+     * @param attrList attribute info
+     * @return method strings
+     */
+    private static List<String> getMethodStrings(TempDataStoreType dataStoreType, GeneratedFileType genFileType,
+            String className, File file, List<AttributeInfo> attrList) {
+
+        List<String> methods = new LinkedList<>();
+        try {
+            methods = TempDataStore.getTempData(dataStoreType, className);
+        } catch (ClassNotFoundException | IOException e) {
+            log.info("There is no attribute info of " + className + " YANG file in the serialized files.");
+        }
+
+        if (attrList != null) {
+            MethodsGenerator.setAttrInfo(attrList);
+            for (AttributeInfo attr : attrList) {
+                if (attr.isListAttr()) {
+                    attr.setAttributeType(AttributesJavaDataType.getListString(attr));
+                }
+                methods.add(MethodsGenerator.getMethodString(attr, genFileType));
+            }
+        }
+        return methods;
+    }
+
+    /**
+     * Initiate generation of file based on generated file type.
+     *
+     * @param file generated file
+     * @param className generated file class name
+     * @param type generated file type
+     * @param imports imports for the file
+     * @param pkg generated file package
+     * @throws IOException when fails to generate a file
+     */
+    private static void initiateFile(File file, String className, GeneratedFileType type, List<String> imports,
+            String pkg) throws IOException {
+        try {
+            file.createNewFile();
+            appendContents(file, className, type, imports, pkg);
+        } catch (IOException e) {
+            throw new IOException("Failed to create " + file.getName() + " class file.");
+        }
+    }
+
+    /**
+     * Appends the temp files to main files.
+     *
+     * @param appendFile temp file
+     * @param srcFile main file
+     * @throws IOException when fails to append contents.
+     */
+    public static void appendFileContents(File appendFile, File srcFile) throws IOException {
+        try {
+            FileSystemUtil.appendFileContents(appendFile, srcFile);
+        } catch (IOException e) {
+            throw new IOException("Failed to append " + appendFile + " in " + srcFile);
+        }
+    }
+
+    /**
+     * Append methods to the generated files.
+     *
+     * @param file file in which method needs to be appended.
+     * @param method method which needs to be appended.
+     */
+    private static void appendMethod(File file, String method) throws IOException {
+        insert(file, method);
+    }
+
+    /**
+     * Closes the current generated file.
+     *
+     * @param fileType generate file type
+     * @param yangName file name
+     * @return end of class definition string.
+     */
+    public static String closeFile(GeneratedFileType fileType, String yangName) {
+        return JavaCodeSnippetGen.getJavaClassDefClose(fileType, yangName);
+    }
+
+    /**
+     * Parses attribute info and fetch specific data and creates serialized
+     * files of it.
+     *
+     * @param attr attribute info.
+     * @param genFileType generated file type
+     * @param className class name
+     */
+    public static void parseAttributeInfo(AttributeInfo attr, GeneratedFileType genFileType, String className) {
+
+        String attrString = "";
+        String methodString = "";
+        String getterString = "";
+
+        try {
+            /*
+             * Serialize attributes.
+             */
+            attrString = getAttributeString(attr, genFileType);
+            attrString = attrString.replace("\"", "");
+            TempDataStore.setTempData(attrString, TempDataStore.TempDataStoreType.ATTRIBUTE, className);
+
+            if (genFileType.equals(GeneratedFileType.ALL)) {
+
+                methodString = MethodsGenerator.getMethodString(attr, GeneratedFileType.INTERFACE);
+                TempDataStore.setTempData(methodString, TempDataStore.TempDataStoreType.GETTER_METHODS, className);
+
+                methodString = MethodsGenerator.getMethodString(attr, GeneratedFileType.BUILDER_CLASS);
+                TempDataStore.setTempData(methodString, TempDataStore.TempDataStoreType.BUILDER_METHODS, className);
+
+                methodString = MethodsGenerator.getMethodString(attr, GeneratedFileType.BUILDER_INTERFACE);
+                TempDataStore.setTempData(methodString, TempDataStore.TempDataStoreType.BUILDER_INTERFACE_METHODS,
+                        className);
+
+                methodString = MethodsGenerator.getMethodString(attr, GeneratedFileType.IMPL);
+                TempDataStore.setTempData(methodString, TempDataStore.TempDataStoreType.IMPL_METHODS, className);
+
+            } else if (genFileType.equals(GeneratedFileType.INTERFACE)) {
+
+                getterString = MethodsGenerator.getGetterString(attr);
+                TempDataStore.setTempData(methodString, TempDataStore.TempDataStoreType.GETTER_METHODS, className);
+            }
+        } catch (IOException e) {
+            log.info("Failed to get data for " + attr.getAttributeName() + " from serialized files.");
+        }
+    }
+
+    /**
+     * Returns attribute string.
+     *
+     * @param attr attribute info
+     * @param genFileType generated file type
+     * @return attribute string
+     */
+    private static String getAttributeString(AttributeInfo attr, GeneratedFileType genFileType) {
+        return JavaCodeSnippetGen.getJavaAttributeInfo(genFileType, attr.getAttributeName(), attr.getAttributeType());
+    }
+
+    /**
+     * Appends all the contents into a generated java file.
+     *
+     * @param file generated file
+     * @param fileName generated file name
+     * @param type generated file type
+     * @param pkg generated file package
+     * @throws IOException when fails to append contents.
+     */
+    private static void appendContents(File file, String fileName, GeneratedFileType type, List<String> importsList,
+            String pkg) throws IOException {
+
+        if (type.equals(GeneratedFileType.IMPL)) {
+
+            write(file, fileName, type, JavaDocType.IMPL_CLASS);
+        } else if (type.equals(GeneratedFileType.BUILDER_INTERFACE)) {
+
+            write(file, fileName, type, JavaDocType.BUILDER_INTERFACE);
+        } else {
+
+            if (type.equals(GeneratedFileType.INTERFACE)) {
+                insert(file, CopyrightHeader.getCopyrightHeader());
+                insert(file, "package" + UtilConstants.SPACE + pkg + UtilConstants.SEMI_COLAN + UtilConstants.NEW_LINE);
+                if (importsList != null) {
+                    insert(file, UtilConstants.NEW_LINE);
+                    for (String imports : importsList) {
+                        insert(file, imports);
+                    }
+                    insert(file, UtilConstants.NEW_LINE);
+                }
+                insert(file, UtilConstants.NEW_LINE);
+                write(file, fileName, type, JavaDocType.INTERFACE);
+            } else if (type.equals(GeneratedFileType.BUILDER_CLASS)) {
+                insert(file, CopyrightHeader.getCopyrightHeader());
+                insert(file, "package" + UtilConstants.SPACE + pkg + UtilConstants.SEMI_COLAN + UtilConstants.NEW_LINE);
+                if (importsList != null) {
+                    insert(file, UtilConstants.NEW_LINE);
+                    for (String imports : importsList) {
+                        insert(file, imports);
+                    }
+                    insert(file, UtilConstants.NEW_LINE);
+                }
+                insert(file, UtilConstants.NEW_LINE);
+                write(file, fileName, type, JavaDocType.BUILDER_CLASS);
+            }
+        }
+    }
+
+    /**
+     * Write data to the specific generated file.
+     *
+     * @param file generated file
+     * @param fileName file name
+     * @param genType generated file type
+     * @param javaDocType java doc type
+     * @throws IOException when fails to write into a file.
+     */
+    private static void write(File file, String fileName, GeneratedFileType genType, JavaDocGen.JavaDocType javaDocType)
+            throws IOException {
+
+        insert(file, JavaDocGen.getJavaDoc(javaDocType, fileName));
+        insert(file, JavaCodeSnippetGen.getJavaClassDefStart(genType, fileName));
+    }
+
+    /**
+     * Insert in the generated file.
+     *
+     * @param file file in which need to be inserted.
+     * @param data data which need to be inserted.
+     * @throws IOException when fails to insert into file
+     */
+    public static void insert(File file, String data) throws IOException {
+        try {
+            FileSystemUtil.insertStringInFile(file, data);
+        } catch (IOException e) {
+            throw new IOException("Failed to insert in " + file + "file");
+        }
+    }
+
+    /**
+     * Removes temp files.
+     *
+     * @param file file to be removed.
+     */
+    public static void clean(File file) {
+        if (file.exists()) {
+            file.delete();
+        }
+    }
+}
diff --git a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java
index cd26056..58005b1 100644
--- a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java
+++ b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java
@@ -50,7 +50,7 @@
         pkg = pkg + UtilConstants.PERIOD;
         pkg = pkg + getYangRevisionStr(revision);
 
-        return pkg;
+        return pkg.toLowerCase();
     }
 
     /**
@@ -126,11 +126,11 @@
      * Get the package from parent's package and string.
      *
      * @param parentPkg parent's package.
-     * @param childName child's name.
+     * @param parentName parent's name.
      * @return package string.
      */
-    public static String getPackageFromParent(String parentPkg, String childName) {
-        return parentPkg + UtilConstants.PERIOD + getSubPkgFromName(childName);
+    public static String getPackageFromParent(String parentPkg, String parentName) {
+        return (parentPkg + UtilConstants.PERIOD + getSubPkgFromName(parentName)).toLowerCase();
     }
 
     /**
diff --git a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java
index 23b4afb..8fdaf5f 100644
--- a/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java
+++ b/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java
@@ -109,6 +109,7 @@
      * @param returnType return type of method
      * @return constructed method impl
      */
+    @SuppressWarnings("rawtypes")
     public static String constructMethodInfo(GeneratedFileType genFileTypes, String yangName,
             GeneratedMethodTypes methodTypes, YangType<?> returnType) {
 
@@ -187,8 +188,7 @@
                 attr.getAttributeName(), GeneratedMethodTypes.GETTER, attr.getAttributeType());
         String setterString = JavaCodeSnippetGen.getJavaMethodInfo(GeneratedFileType.BUILDER_CLASS,
                 attr.getAttributeName(), GeneratedMethodTypes.SETTER, attr.getAttributeType());
-        return overrideString + getterString + UtilConstants.NEW_LINE + overrideString + setterString
-                + UtilConstants.NEW_LINE;
+        return overrideString + getterString + UtilConstants.NEW_LINE + overrideString + setterString;
     }
 
     /**
@@ -201,8 +201,7 @@
 
         return UtilConstants.NEW_LINE + UtilConstants.FOUR_SPACE_INDENTATION + UtilConstants.OVERRIDE
                 + UtilConstants.NEW_LINE + JavaCodeSnippetGen.getJavaMethodInfo(GeneratedFileType.BUILDER_CLASS,
-                        attr.getAttributeName(), GeneratedMethodTypes.GETTER, attr.getAttributeType())
-                + UtilConstants.NEW_LINE;
+                        attr.getAttributeName(), GeneratedMethodTypes.GETTER, attr.getAttributeType());
     }
 
     /**
@@ -400,8 +399,7 @@
             }
             getAttrInfo().clear();
         }
-        return constructor + UtilConstants.FOUR_SPACE_INDENTATION + UtilConstants.CLOSE_CURLY_BRACKET
-                + UtilConstants.NEW_LINE;
+        return constructor + UtilConstants.FOUR_SPACE_INDENTATION + UtilConstants.CLOSE_CURLY_BRACKET;
     }
 
     /**