/*
* JBoss, Community-driven Open Source Middleware
* Copyright 2010, JBoss by Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed 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.jboss.arquillian.openwebbeans;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import java.security.SecureClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Iterator;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.Node;
/**
* A ClassLoader implementation that can locate resources in a ShrinkWrap archive
*
* <p><strong>NOTE</strong> This is a prototype implementation of this concept. It
* does not address all classloading concerns as of yet.</p>
*
* @author <a href="mailto:dan.allen@mojavelinux.com">Dan Allen</a>
*/
public class ShrinkWrapClassLoader extends SecureClassLoader
{
public static final String ARCHIVE_PROTOCOL = "archive:/";
private final Archive<?> archive;
public ShrinkWrapClassLoader(Archive<?> archive)
{
super();
this.archive = archive;
}
@Override
protected URL findResource(final String name)
{
final Node a = archive.get(name);
if (a == null)
{
return null;
}
try
{
return new URL(null, ARCHIVE_PROTOCOL + name, new URLStreamHandler()
{
@Override
protected java.net.URLConnection openConnection(URL u) throws java.io.IOException
{
return new URLConnection(u)
{
@Override
public void connect() throws IOException
{
}
@Override
public InputStream getInputStream()
throws IOException
{
return a.getAsset().openStream();
}
};
}
;
});
}
catch (Exception e)
{
return null;
}
}
@Override
protected Enumeration<URL> findResources(String name) throws IOException
{
Iterator<URL> it = new ArrayList<URL>(0).iterator();
URL resource = findResource(name);
if (resource != null)
{
it = Arrays.asList(resource).iterator();
}
final Iterator<URL> i = it;
return new Enumeration<URL>()
{
public boolean hasMoreElements()
{
return i.hasNext();
}
public URL nextElement()
{
return i.next();
}
};
}
}