| /* |
| * 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.parser.impl.listeners; |
| |
| import org.onosproject.yangutils.datamodel.YangImport; |
| import org.onosproject.yangutils.datamodel.YangInclude; |
| import org.onosproject.yangutils.parser.Parsable; |
| import org.onosproject.yangutils.parser.ParsableDataType; |
| 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.parserutils.ListenerErrorLocation; |
| import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction; |
| import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType; |
| import org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation; |
| |
| /* |
| * Reference: RFC6020 and YANG ANTLR Grammar |
| * |
| * ABNF grammar as per RFC6020 |
| * import-stmt = import-keyword sep identifier-arg-str optsep |
| * "{" stmtsep |
| * prefix-stmt stmtsep |
| * [revision-date-stmt stmtsep] |
| * "}" |
| * include-stmt = include-keyword sep identifier-arg-str optsep |
| * (";" / |
| * "{" stmtsep |
| * [revision-date-stmt stmtsep] |
| * "}") |
| * revision-date-stmt = revision-date-keyword sep revision-date stmtend |
| * |
| * ANTLR grammar rule |
| * import_stmt : IMPORT_KEYWORD IDENTIFIER LEFT_CURLY_BRACE import_stmt_body |
| * RIGHT_CURLY_BRACE; |
| * import_stmt_body : prefix_stmt revision_date_stmt?; |
| * |
| * include_stmt : INCLUDE_KEYWORD IDENTIFIER (STMTEND | LEFT_CURLY_BRACE |
| * revision_date_stmt_body? RIGHT_CURLY_BRACE); |
| * |
| * revision_date_stmt : REVISION_DATE_KEYWORD DATE_ARG STMTEND; |
| * |
| */ |
| |
| /** |
| * Implements listener based call back function corresponding to the "revision date" |
| * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020. |
| */ |
| public final class RevisionDateListener { |
| |
| /** |
| * Creates a new revision date listener. |
| */ |
| private RevisionDateListener() { |
| } |
| |
| /** |
| * It is called when parser receives an input matching the grammar |
| * rule (revision date),perform validations and update the data model |
| * tree. |
| * |
| * @param listener Listener's object. |
| * @param ctx context object of the grammar rule. |
| */ |
| public static void processRevisionDateEntry(TreeWalkListener listener, |
| GeneratedYangParser.RevisionDateStatementContext ctx) { |
| |
| // Check for stack to be non empty. |
| ListenerValidation.checkStackIsNotEmpty(listener, ListenerErrorType.MISSING_HOLDER, |
| ParsableDataType.REVISION_DATE_DATA, |
| String.valueOf(ctx.DATE_ARG().getText()), |
| ListenerErrorLocation.ENTRY); |
| |
| // Obtain the node of the stack. |
| Parsable tmpNode = listener.getParsedDataStack().peek(); |
| switch (tmpNode.getParsableDataType()) { |
| case IMPORT_DATA: { |
| YangImport importNode = (YangImport) tmpNode; |
| importNode.setRevision(String.valueOf(ctx.DATE_ARG().getText())); |
| break; |
| } |
| case INCLUDE_DATA: { |
| YangInclude includeNode = (YangInclude) tmpNode; |
| includeNode.setRevision(String.valueOf(ctx.DATE_ARG().getText())); |
| break; |
| } |
| default: |
| throw new ParserException( |
| ListenerErrorMessageConstruction |
| .constructListenerErrorMessage(ListenerErrorType.INVALID_HOLDER, |
| ParsableDataType.REVISION_DATE_DATA, |
| String.valueOf(ctx.DATE_ARG().getText()), |
| ListenerErrorLocation.ENTRY)); |
| } |
| } |
| // TODO Implement the DATE_ARG validation as per RFC 6020. |
| } |