Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | 0f7908b | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 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 | |
Vidyashree Rama | b24ca90 | 2016-02-13 21:47:58 +0530 | [diff] [blame] | 19 | import org.onosproject.yangutils.datamodel.YangContainer; |
| 20 | import org.onosproject.yangutils.parser.Parsable; |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 21 | import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser; |
Vidyashree Rama | b24ca90 | 2016-02-13 21:47:58 +0530 | [diff] [blame] | 22 | import org.onosproject.yangutils.parser.exceptions.ParserException; |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 23 | import org.onosproject.yangutils.parser.impl.TreeWalkListener; |
Vidyashree Rama | e300f70 | 2016-02-20 19:27:56 +0530 | [diff] [blame] | 24 | |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 25 | import static org.onosproject.yangutils.utils.YangConstructType.PRESENCE_DATA; |
| 26 | import static org.onosproject.yangutils.utils.YangConstructType.CONTAINER_DATA; |
Vidyashree Rama | e300f70 | 2016-02-20 19:27:56 +0530 | [diff] [blame] | 27 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY; |
| 28 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage; |
| 29 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER; |
| 30 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER; |
| 31 | import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty; |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 32 | |
| 33 | /* |
| 34 | * Reference: RFC6020 and YANG ANTLR Grammar |
| 35 | * |
| 36 | * ABNF grammar as per RFC6020 |
| 37 | * presence-stmt = presence-keyword sep string stmtend |
| 38 | * |
| 39 | * ANTLR grammar rule |
| 40 | * presenceStatement : PRESENCE_KEYWORD string STMTEND; |
| 41 | */ |
| 42 | |
| 43 | /** |
| 44 | * Implements listener based call back function corresponding to the "presence" |
| 45 | * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020. |
| 46 | */ |
| 47 | public final class PresenceListener { |
| 48 | |
| 49 | /** |
| 50 | * Creates a new presence listener. |
| 51 | */ |
| 52 | private PresenceListener() { |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * It is called when parser receives an input matching the grammar |
| 57 | * rule (presence), performs validation and updates the data model |
| 58 | * tree. |
| 59 | * |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 60 | * @param listener listener's object |
| 61 | * @param ctx context object of the grammar rule |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 62 | */ |
| 63 | public static void processPresenceEntry(TreeWalkListener listener, |
| 64 | GeneratedYangParser.PresenceStatementContext ctx) { |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 65 | |
Vidyashree Rama | b24ca90 | 2016-02-13 21:47:58 +0530 | [diff] [blame] | 66 | // Check for stack to be non empty. |
Vidyashree Rama | e300f70 | 2016-02-20 19:27:56 +0530 | [diff] [blame] | 67 | checkStackIsNotEmpty(listener, MISSING_HOLDER, PRESENCE_DATA, ctx.string().getText(), ENTRY); |
Vidyashree Rama | b24ca90 | 2016-02-13 21:47:58 +0530 | [diff] [blame] | 68 | |
| 69 | Parsable tmpData = listener.getParsedDataStack().peek(); |
Gaurav Agrawal | db828bd | 2016-02-27 03:57:50 +0530 | [diff] [blame] | 70 | if (tmpData.getYangConstructType() == CONTAINER_DATA) { |
Vidyashree Rama | b24ca90 | 2016-02-13 21:47:58 +0530 | [diff] [blame] | 71 | YangContainer container = (YangContainer) tmpData; |
| 72 | container.setPresence(ctx.string().getText()); |
| 73 | } else { |
Vidyashree Rama | e300f70 | 2016-02-20 19:27:56 +0530 | [diff] [blame] | 74 | throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, PRESENCE_DATA, |
| 75 | ctx.string().getText(), ENTRY)); |
Vidyashree Rama | b24ca90 | 2016-02-13 21:47:58 +0530 | [diff] [blame] | 76 | } |
Vidyashree Rama | fe971cb | 2016-02-12 18:44:12 +0530 | [diff] [blame] | 77 | } |
| 78 | } |