/*
* 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.apache.wicket.resource;
import org.apache.wicket.MetaDataKey;
import org.apache.wicket.Session;
import org.apache.wicket.protocol.http.ClientProperties;
import org.apache.wicket.protocol.http.WebSession;
import org.apache.wicket.protocol.http.request.WebClientInfo;
import org.apache.wicket.request.cycle.RequestCycle;
/**
* A resource reference that calculates which version of jQuery JavaScript library to use depending
* on the user agent. For IE 6/7/8 jQuery ver. 1.x will be used, for any other browser - ver. 2.x.
*
* To use this resource reference do:
* <code>
* app.getJavaScriptLibrarySettings().setJQueryReference(new DynamicJQueryResourceReference())
* </code>
*
* @since 6.9.0
*/
public class DynamicJQueryResourceReference extends JQueryResourceReference
{
private static final long serialVersionUID = 1L;
/**
* The key for the metadata that is used as a cache to calculate the name
* only once
*/
private static final MetaDataKey<String> KEY = new MetaDataKey<String>()
{
};
/**
* jQuery ver. 2.x - works only on modern browsers
*/
public static final String VERSION_2 = "jquery/jquery-2.0.3.js";
public DynamicJQueryResourceReference()
{
}
@Override
public String getName()
{
RequestCycle requestCycle = RequestCycle.get();
String name = requestCycle.getMetaData(KEY);
if (name == null)
{
WebClientInfo clientInfo;
name = getVersion2();
if (Session.exists())
{
WebSession session = WebSession.get();
clientInfo = session.getClientInfo();
}
else
{
clientInfo = new WebClientInfo(requestCycle);
}
ClientProperties clientProperties = clientInfo.getProperties();
if (clientProperties.isBrowserInternetExplorer() && clientProperties.getBrowserVersionMajor() < 9)
{
name = getVersion1();
}
requestCycle.setMetaData(KEY, name);
}
return name;
}
protected String getVersion1()
{
return VERSION_1;
}
protected String getVersion2()
{
return VERSION_2;
}
@Override
public Class<?> getScope()
{
return getClass();
}
}