/*
* 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.deltaspike.core.util;
import java.io.IOException;
import java.net.URL;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
public class AggregatedClassLoader extends ClassLoader
{
private final List<ClassLoader> classLoaders;
public AggregatedClassLoader(List<ClassLoader> classLoaders)
{
super();
this.classLoaders = classLoaders;
}
public static AggregatedClassLoader newInstance()
{
return new AggregatedClassLoader(Arrays.asList(
AggregatedClassLoader.class.getClassLoader(),
Thread.currentThread().getContextClassLoader(),
ClassLoader.getSystemClassLoader()));
}
@Override
public URL getResource(String name)
{
for (ClassLoader loader : classLoaders)
{
URL url = loader.getResource(name);
if (url != null)
{
return url;
}
}
return super.getResource(name);
}
@Override
public Enumeration<URL> getResources(String name) throws IOException
{
final Set<URL> result = new LinkedHashSet<URL>();
for (ClassLoader loader : classLoaders)
{
Enumeration<URL> urls = loader.getResources(name);
while (urls.hasMoreElements())
{
result.add(urls.nextElement());
}
}
return new Enumeration<URL>()
{
private final Iterator<URL> iterator = result.iterator();
@Override
public URL nextElement()
{
return iterator.next();
}
@Override
public boolean hasMoreElements()
{
return iterator.hasNext();
}
};
}
}