Here you can find the source of assertIsProperlyQuoted(String header, String tag)
private static void assertIsProperlyQuoted(String header, String tag)
//package com.java2s; /**//from w w w . j a v a 2 s . com * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * This file is part of the LDP4j Project: * http://www.ldp4j.org/ * * Center for Open Middleware * http://www.centeropenmiddleware.com/ * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * Copyright (C) 2014-2016 Center for Open Middleware. * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * 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. * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * Artifact : org.ldp4j.framework:ldp4j-application-engine-api:0.2.1 * Bundle : ldp4j-application-engine-api-0.2.1.jar * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# */ public class Main { private static final String MISFORMATTED_ENTITY_TAG = "Misformatted entity tag : "; private static final String QUOTATION_MARK = "\""; private static void assertIsProperlyQuoted(String header, String tag) { if (tag.length() < 2 || !tag.startsWith(QUOTATION_MARK) || !tag.endsWith(QUOTATION_MARK)) { throw new IllegalArgumentException(MISFORMATTED_ENTITY_TAG + header); } } }