| /* |
| * 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.parserutils; |
| |
| import org.onosproject.yangutils.parser.impl.TreeWalkListener; |
| |
| /** |
| * Its a utility to carry out listener validation. |
| */ |
| public final class ListenerValidation { |
| |
| /** |
| * Creates a new belongto listener. |
| */ |
| private ListenerValidation() { |
| } |
| |
| /** |
| * Checks if error is set or parsed data stack is empty. |
| * |
| * @param listener Listener's object. |
| * @param errNode parsable node for which validation needs to be done. |
| * @return validation result. |
| */ |
| public static boolean preValidation(TreeWalkListener listener, String errNode) { |
| |
| // Check whether error found while walking YANG file, if yes return true. |
| if (listener.getErrorInformation().isErrorFlag()) { |
| return true; |
| } |
| |
| // If stack is empty it indicates error condition |
| if (listener.getParsedDataStack().empty()) { |
| listener.getErrorInformation().setErrorFlag(true); |
| listener.getErrorInformation().setErrorMsg("Parsable stack empty at" + errNode + "entry"); |
| return true; |
| } |
| return false; |
| } |
| } |