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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.wicketstuff.jquery.ui.resource;

import de.agilecoders.wicket.webjars.request.resource.WebjarsJavaScriptResourceReference;
import org.apache.wicket.Application;
import org.apache.wicket.markup.head.HeaderItem;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.request.resource.ResourceReference;
import org.apache.wicket.resource.JQueryResourceReference;

import java.util.List;

/**
 * Provides the resource reference for the jQuery UI javascript library.
 *
 * @author Sebastien Briquet - sebfz1
 *
 */
public class JQueryUIResourceReference extends WebjarsJavaScriptResourceReference{
	private static final long serialVersionUID = 1L;

	private static final JQueryUIResourceReference INSTANCE = new JQueryUIResourceReference();

	/**
	 * Gets the instance of the resource reference
	 *
	 * @return the single instance of the resource reference
	 */
	public static JQueryUIResourceReference get()
	{
		return INSTANCE;
	}

	/**
	 * Private constructor
	 */
	private JQueryUIResourceReference()
	{
		super("jquery-ui/current/jquery-ui.js");
	}

	@Override
	public List getDependencies()
	{
		final ResourceReference backingLibraryReference;
		if (Application.exists())
		{
			backingLibraryReference = Application.get()
					.getJavaScriptLibrarySettings()
					.getJQueryReference();
		}
		else
		{
			backingLibraryReference = JQueryResourceReference.getV3();
		}
		List dependencies = super.getDependencies();
		dependencies.add(JavaScriptHeaderItem.forReference(backingLibraryReference));
		return dependencies;
	}
}