| /* |
| * Copyright 2016-present 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.datamodel.exceptions.DataModelException; |
| import org.onosproject.yangutils.parser.Parsable; |
| import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser; |
| import org.onosproject.yangutils.parser.exceptions.ParserException; |
| import org.onosproject.yangutils.parser.impl.TreeWalkListener; |
| |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY; |
| 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.INVALID_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.UNHANDLED_PARSED_DATA; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerUtil.removeQuotesAndHandleConcat; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty; |
| import static org.onosproject.yangutils.utils.YangConstructType.KEY_DATA; |
| |
| /* |
| * 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 key STMTEND; |
| * key : string; |
| */ |
| |
| /** |
| * Represesnts 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. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, KEY_DATA, ctx.key().getText(), ENTRY); |
| |
| Parsable tmpData = listener.getParsedDataStack().peek(); |
| if (listener.getParsedDataStack().peek() instanceof YangList) { |
| YangList yangList = (YangList) tmpData; |
| String tmpKeyValue = removeQuotesAndHandleConcat(ctx.key().getText()); |
| if (tmpKeyValue.contains(" ")) { |
| String[] keyValues = tmpKeyValue.split(" "); |
| for (String keyValue : keyValues) { |
| try { |
| yangList.addKey(keyValue); |
| } catch (DataModelException e) { |
| throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA, KEY_DATA, |
| ctx.key().getText(), ENTRY, e.getMessage())); |
| } |
| } |
| } else { |
| try { |
| yangList.addKey(tmpKeyValue); |
| } catch (DataModelException e) { |
| throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA, KEY_DATA, |
| ctx.key().getText(), ENTRY, e.getMessage())); |
| } |
| } |
| } else { |
| throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, KEY_DATA, ctx.key().getText(), |
| ENTRY)); |
| } |
| } |
| } |