/*
* 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.cocoon.jnet;
import java.net.URLStreamHandler;
import java.net.URLStreamHandlerFactory;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
public class DynamicURLStreamHandlerFactory implements URLStreamHandlerFactory {
private static final ThreadLocal<List<URLStreamHandlerFactory>> FACTORIES = new InheritableThreadLocal<List<URLStreamHandlerFactory>>();
public static void pop() {
getList().remove(0);
}
public static void push(URLStreamHandlerFactory factory) {
getList().add(0, factory);
}
private static List<URLStreamHandlerFactory> getList() {
List<URLStreamHandlerFactory> list = FACTORIES.get();
if (list == null) {
list = Collections.synchronizedList(new LinkedList<URLStreamHandlerFactory>());
FACTORIES.set(list);
}
return list;
}
/**
* {@inheritDoc}
*
* @see java.net.URLStreamHandlerFactory#createURLStreamHandler(java.lang.String)
*/
public URLStreamHandler createURLStreamHandler(String protocol) {
List<URLStreamHandlerFactory> list = getList();
for (Iterator<URLStreamHandlerFactory> i = list.iterator(); i.hasNext();) {
URLStreamHandler handler = i.next().createURLStreamHandler(protocol);
if (handler != null) {
return handler;
}
}
return null;
}
}