001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket.ajax;
018
019import java.util.List;
020
021import org.apache.wicket.Application;
022import org.apache.wicket.markup.head.HeaderItem;
023import org.apache.wicket.markup.head.JavaScriptHeaderItem;
024import org.apache.wicket.request.resource.JavaScriptResourceReference;
025import org.apache.wicket.request.resource.ResourceReference;
026import org.apache.wicket.resource.JQueryResourceReference;
027
028/**
029 * @author hoeve
030 */
031public class WicketAjaxJQueryResourceReference extends JavaScriptResourceReference
032{
033        private static final long serialVersionUID = -2918665261694523156L;
034
035        private static final WicketAjaxJQueryResourceReference INSTANCE = new WicketAjaxJQueryResourceReference();
036
037        /**
038         * @return the singleton INSTANCE
039         */
040        public static WicketAjaxJQueryResourceReference get()
041        {
042                return INSTANCE;
043        }
044
045        private WicketAjaxJQueryResourceReference()
046        {
047                super(AbstractDefaultAjaxBehavior.class, "res/js/wicket-ajax-jquery.js");
048        }
049
050        @Override
051        public List<HeaderItem> getDependencies()
052        {
053                final ResourceReference jqueryReference;
054                if (Application.exists())
055                {
056                        jqueryReference = Application.get().getJavaScriptLibrarySettings().getJQueryReference();
057                }
058                else
059                {
060                        jqueryReference = JQueryResourceReference.getV3();
061                }
062                List<HeaderItem> dependencies = super.getDependencies();
063                dependencies.add(JavaScriptHeaderItem.forReference(jqueryReference));
064                return dependencies;
065        }
066}