| /* |
| * 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.YangList; |
| 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 |
| * key-stmt = key-keyword sep key-arg-str stmtend |
| * |
| * ANTLR grammar rule |
| * keyStatement : KEY_KEYWORD string STMTEND; |
| */ |
| |
| /** |
| * Implements listener based call back function corresponding to the "key" |
| * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020. |
| */ |
| public final class KeyListener { |
| |
| /** |
| * Creates a new key listener. |
| */ |
| private KeyListener() { |
| } |
| |
| /** |
| * It is called when parser receives an input matching the grammar |
| * rule (key), perform validations and updates the data model |
| * tree. |
| * |
| * @param listener listener's object. |
| * @param ctx context object of the grammar rule. |
| */ |
| public static void processKeyEntry(TreeWalkListener listener, |
| GeneratedYangParser.KeyStatementContext ctx) { |
| |
| // Check for stack to be non empty. |
| ListenerValidation.checkStackIsNotEmpty(listener, ListenerErrorType.MISSING_HOLDER, |
| ParsableDataType.KEY_DATA, String.valueOf(ctx.string().getText()), |
| ListenerErrorLocation.ENTRY); |
| |
| Parsable tmpData = listener.getParsedDataStack().peek(); |
| if (listener.getParsedDataStack().peek() instanceof YangList) { |
| YangList yangList = (YangList) tmpData; |
| String tmpKeyValue = ctx.string().getText().replace("\"", ""); |
| if (tmpKeyValue.contains(" ")) { |
| String[] keyValues = tmpKeyValue.split(" "); |
| for (String keyValue : keyValues) { |
| yangList.addKey(keyValue); |
| } |
| } else { |
| yangList.addKey(tmpKeyValue); |
| } |
| } else { |
| throw new ParserException(ListenerErrorMessageConstruction |
| .constructListenerErrorMessage(ListenerErrorType.INVALID_HOLDER, |
| ParsableDataType.KEY_DATA, |
| String.valueOf(ctx.string().getText()), |
| ListenerErrorLocation.ENTRY)); |
| } |
| } |
| } |