| /* |
| * Copyright 2014-2016 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.parser.impl.listeners; |
| |
| /* |
| * Reference: RFC6020 and YANG ANTLR Grammar |
| * |
| * body-stmts = *((extension-stmt / |
| * feature-stmt / |
| * identity-stmt / |
| * typedef-stmt / |
| * grouping-stmt / |
| * data-def-stmt / |
| * augment-stmt / |
| * rpc-stmt / |
| * notification-stmt / |
| * deviation-stmt) stmtsep) |
| * |
| * typedef-stmt = typedef-keyword sep identifier-arg-str optsep |
| * "{" stmtsep |
| * ;; these stmts can appear in any order |
| * type-stmt stmtsep |
| * [units-stmt stmtsep] |
| * [default-stmt stmtsep] |
| * [status-stmt stmtsep] |
| * [description-stmt stmtsep] |
| * [reference-stmt stmtsep] |
| * "}" |
| * |
| * ANTLR grammar rule |
| * typedefStatement : TYPEDEF_KEYWORD IDENTIFIER LEFT_CURLY_BRACE |
| * (typeStatement | unitsStatement | defaultStatement | statusStatement |
| * | descriptionStatement | referenceStatement)* RIGHT_CURLY_BRACE; |
| */ |
| |
| import org.onosproject.yangutils.datamodel.YangContainer; |
| import org.onosproject.yangutils.datamodel.YangList; |
| import org.onosproject.yangutils.datamodel.YangModule; |
| import org.onosproject.yangutils.datamodel.YangNode; |
| import org.onosproject.yangutils.datamodel.YangSubModule; |
| import org.onosproject.yangutils.datamodel.YangTypeDef; |
| import org.onosproject.yangutils.datamodel.exceptions.DataModelException; |
| import org.onosproject.yangutils.parser.Parsable; |
| import org.onosproject.yangutils.parser.ParsableDataType; |
| import static org.onosproject.yangutils.parser.ParsableDataType.TYPEDEF_DATA; |
| import static org.onosproject.yangutils.parser.ParsableDataType.UNITS_DATA; |
| import static org.onosproject.yangutils.parser.ParsableDataType.DEFAULT_DATA; |
| import static org.onosproject.yangutils.parser.ParsableDataType.TYPE_DATA; |
| import static org.onosproject.yangutils.parser.ParsableDataType.DESCRIPTION_DATA; |
| import static org.onosproject.yangutils.parser.ParsableDataType.REFERENCE_DATA; |
| import static org.onosproject.yangutils.parser.ParsableDataType.STATUS_DATA; |
| import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser; |
| import org.onosproject.yangutils.parser.exceptions.ParserException; |
| import org.onosproject.yangutils.parser.impl.TreeWalkListener; |
| import org.onosproject.yangutils.parser.impl.YangUtilsParserManager; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.EXIT; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructExtendedListenerErrorMessage; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_CARDINALITY; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.UNHANDLED_PARSED_DATA; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_CURRENT_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty; |
| |
| /** |
| * Implements listener based call back function corresponding to the "typedef" |
| * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020. |
| */ |
| public final class TypeDefListener { |
| |
| private static ParsableDataType yangConstruct; |
| |
| /** |
| * Creates a new typedef listener. |
| */ |
| private TypeDefListener() { |
| } |
| |
| /** |
| * It is called when parser enters grammar rule (typedef), it perform |
| * validations and updates the data model tree. |
| * |
| * @param listener listener's object. |
| * @param ctx context object of the grammar rule. |
| */ |
| public static void processTypeDefEntry(TreeWalkListener listener, |
| GeneratedYangParser.TypedefStatementContext ctx) { |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, TYPEDEF_DATA, ctx.IDENTIFIER().getText(), ENTRY); |
| |
| boolean result = validateSubStatementsCardinality(ctx); |
| if (!result) { |
| throw new ParserException(constructListenerErrorMessage(INVALID_CARDINALITY, yangConstruct, "", ENTRY)); |
| } |
| |
| YangTypeDef typeDefNode = new YangTypeDef(); |
| typeDefNode.setDerivedName(ctx.IDENTIFIER().getText()); |
| |
| Parsable curData = listener.getParsedDataStack().peek(); |
| |
| if (curData instanceof YangModule | curData instanceof YangSubModule | curData instanceof YangContainer |
| | curData instanceof YangList) { |
| /* |
| * TODO YangGrouping, YangRpc, YangInput, YangOutput, Notification. |
| */ |
| YangNode curNode = (YangNode) curData; |
| try { |
| curNode.addChild(typeDefNode); |
| } catch (DataModelException e) { |
| throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA, |
| TYPEDEF_DATA, ctx.IDENTIFIER().getText(), ENTRY, e.getMessage())); |
| } |
| listener.getParsedDataStack().push(typeDefNode); |
| } else { |
| throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, |
| TYPEDEF_DATA, ctx.IDENTIFIER().getText(), ENTRY)); |
| } |
| } |
| |
| /** |
| * It is called when parser exits from grammar rule (typedef), it perform |
| * validations and updates the data model tree. |
| * |
| * @param listener listener's object. |
| * @param ctx context object of the grammar rule. |
| */ |
| public static void processTypeDefExit(TreeWalkListener listener, |
| GeneratedYangParser.TypedefStatementContext ctx) { |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, TYPEDEF_DATA, ctx.IDENTIFIER().getText(), EXIT); |
| |
| if (listener.getParsedDataStack().peek() instanceof YangTypeDef) { |
| listener.getParsedDataStack().pop(); |
| } else { |
| listener.getErrorInformation().setErrorFlag(true); |
| throw new ParserException(constructListenerErrorMessage(MISSING_CURRENT_HOLDER, TYPEDEF_DATA, |
| ctx.IDENTIFIER().getText(), EXIT)); |
| } |
| } |
| |
| /** |
| * Validates the cardinality of typedef sub-statements as per grammar. |
| * |
| * @param ctx context object of the grammar rule. |
| * @return true/false validation success or failure. |
| */ |
| private static boolean validateSubStatementsCardinality(GeneratedYangParser.TypedefStatementContext ctx) { |
| |
| if ((!ctx.unitsStatement().isEmpty()) |
| && (ctx.unitsStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY)) { |
| yangConstruct = UNITS_DATA; |
| return false; |
| } |
| |
| if ((!ctx.defaultStatement().isEmpty()) |
| && (ctx.defaultStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY)) { |
| yangConstruct = DEFAULT_DATA; |
| return false; |
| } |
| |
| if (ctx.typeStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY) { |
| yangConstruct = TYPE_DATA; |
| return false; |
| } |
| |
| if ((!ctx.descriptionStatement().isEmpty()) |
| && (ctx.descriptionStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY)) { |
| yangConstruct = DESCRIPTION_DATA; |
| return false; |
| } |
| |
| if ((!ctx.referenceStatement().isEmpty()) |
| && (ctx.referenceStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY)) { |
| yangConstruct = REFERENCE_DATA; |
| return false; |
| } |
| |
| if ((!ctx.statusStatement().isEmpty()) |
| && (ctx.statusStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY)) { |
| yangConstruct = STATUS_DATA; |
| return false; |
| } |
| return true; |
| } |
| } |