Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.yangutils.parser.impl.listeners; |
| 18 | |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 19 | import org.onosproject.yangutils.datamodel.YangModule; |
| 20 | import org.onosproject.yangutils.datamodel.YangNode; |
| 21 | import org.onosproject.yangutils.datamodel.YangSubModule; |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 22 | import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser; |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 23 | import org.onosproject.yangutils.parser.exceptions.ParserException; |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 24 | import org.onosproject.yangutils.parser.impl.TreeWalkListener; |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 25 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY; |
| 26 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.EXIT; |
| 27 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage; |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 28 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_CHILD; |
| 29 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER; |
| 30 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER; |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 31 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsEmpty; |
| 32 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty; |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 33 | import static org.onosproject.yangutils.utils.YangConstructType.YANGBASE_DATA; |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 34 | |
| 35 | /* |
| 36 | * Reference: RFC6020 and YANG ANTLR Grammar |
| 37 | * |
| 38 | * ANTLR grammar rule |
| 39 | * yangfile : module_stmt |
| 40 | * | submodule_stmt; |
| 41 | */ |
| 42 | |
| 43 | /** |
| 44 | * Implements call back function corresponding to the "base rule" defined in |
| 45 | * ANTLR grammar file. |
| 46 | */ |
| 47 | public final class BaseFileListener { |
| 48 | |
| 49 | /** |
| 50 | * Creates a new base listener. |
| 51 | */ |
| 52 | private BaseFileListener() { |
| 53 | } |
| 54 | |
| 55 | /** |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 56 | * It is called when parser receives an input matching the grammar rule |
| 57 | * (yangfile), perform validations and update the data model tree. |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 58 | * |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 59 | * @param listener Listener's object |
| 60 | * @param ctx context object of the grammar rule |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 61 | */ |
| 62 | public static void processYangFileEntry(TreeWalkListener listener, GeneratedYangParser.YangfileContext ctx) { |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 63 | |
| 64 | // Check if stack is empty. |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 65 | checkStackIsEmpty(listener, INVALID_HOLDER, YANGBASE_DATA, "", ENTRY); |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 66 | |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | /** |
| 70 | * It is called when parser exits from grammar rule (yangfile), it perform |
| 71 | * validations and update the data model tree. |
| 72 | * |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 73 | * @param listener Listener's object |
| 74 | * @param ctx context object of the grammar rule |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 75 | */ |
| 76 | public static void processYangFileExit(TreeWalkListener listener, GeneratedYangParser.YangfileContext ctx) { |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 77 | |
| 78 | // Check for stack to be non empty. |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 79 | checkStackIsNotEmpty(listener, MISSING_HOLDER, YANGBASE_DATA, "", EXIT); |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 80 | |
| 81 | // Data Model tree root node is set. |
Gaurav Agrawal | 0520c7c | 2016-02-21 02:56:46 +0530 | [diff] [blame] | 82 | if ((listener.getParsedDataStack().peek() instanceof YangModule) |
| 83 | || (listener.getParsedDataStack().peek() instanceof YangSubModule)) { |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 84 | listener.setRootNode((YangNode) listener.getParsedDataStack().pop()); |
| 85 | } else { |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 86 | throw new ParserException(constructListenerErrorMessage(INVALID_CHILD, YANGBASE_DATA, "", EXIT)); |
Gaurav Agrawal | 2737d2a | 2016-02-13 14:23:40 +0530 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | // Check if stack is empty. |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 90 | checkStackIsEmpty(listener, INVALID_HOLDER, YANGBASE_DATA, "", EXIT); |
Gaurav Agrawal | 22db16d | 2016-02-12 16:50:55 +0530 | [diff] [blame] | 91 | } |
Gaurav Agrawal | 800a8e7 | 2016-02-19 12:57:13 +0530 | [diff] [blame] | 92 | } |