/*
* 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.webbeans.arquillian.standalone;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.ArchivePath;
import org.jboss.shrinkwrap.api.ArchivePaths;
import org.jboss.shrinkwrap.api.Node;
import org.jboss.shrinkwrap.api.asset.Asset;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import java.io.Closeable;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
public class OwbSWClassLoader extends URLClassLoader implements Closeable
{
// Collections.emptyEnumeration only exists in java7++
private final static Enumeration EMPTY_ENUMERATION = new Enumeration()
{
@Override
public boolean hasMoreElements()
{
return false;
}
@Override
public Object nextElement()
{
return null;
}
};
private final List<InputStream> openedStreams = new ArrayList<InputStream>();
private final String prefix;
private final boolean useOnlyArchiveResources;
private final Archive<?> archive;
private final Collection<String> useOnlyArchiveResourcesExcludes;
public OwbSWClassLoader(final ClassLoader parent, final Archive<?> archive, final boolean useOnlyArchiveResources, final Collection<String> useOnlyArchiveResourcesExcludes)
{
super(new URL[0], parent);
this.useOnlyArchiveResources = useOnlyArchiveResources;
this.useOnlyArchiveResourcesExcludes = useOnlyArchiveResourcesExcludes;
this.archive = archive;
if (WebArchive.class.isInstance(archive))
{
prefix = "/WEB-INF/classes";
}
else
{
prefix = "";
}
try
{ // add it to find classes if used this way
addURL(new URL(null, "archive:" + archive.getName() + "/", new ArchiveStreamHandler()));
}
catch (final MalformedURLException e)
{
throw new RuntimeException("Could not create URL for archive: " + archive.getName(), e);
}
}
@Override
public URL getResource(final String name)
{
if (useOnlyArchiveResources)
{
final URL url = findResource(name);
if (url != null)
{
return url;
} // else user probably used the fact the test is embedded
}
return super.getResource(name);
}
@Override
public Enumeration<URL> getResources(final String name) throws IOException
{
if (useOnlyArchiveResources)
{
final Enumeration<URL> urls = findResources(name);
if (useOnlyArchiveResourcesExcludes.contains(name))
{
final Collection<URL> returnValue = new ArrayList<URL>(Collections.list(urls));
returnValue.addAll(Collections.list(super.getResources(name)));
return Collections.enumeration(returnValue);
}
else if (urls.hasMoreElements())
{
return urls;
} // else user probably used the fact the test is embedded
}
return super.getResources(name);
}
@Override
public URL findResource(final String name)
{
final Node node = findNode(name);
if (node != null)
{
try
{
return new URL(null, "archive:" + archive.getName() + "/" + name, new ArchiveStreamHandler());
}
catch (final MalformedURLException e)
{
// no-op: let reuse parent method
}
}
if (useOnlyArchiveResources)
{
return null;
}
return super.findResource(name);
}
@Override
public Enumeration<URL> findResources(final String name) throws IOException
{
final Node node = findNode(name);
if (node != null)
{
return Collections.enumeration(Collections.singleton(new URL(null, "archive:" + archive.getName() + "/" + name, new ArchiveStreamHandler())));
}
if (useOnlyArchiveResources)
{
return EMPTY_ENUMERATION;
}
return super.findResources(name);
}
private Node findNode(final String name)
{
ArchivePath path = ArchivePaths.create(path(prefix, name));
Node node = archive.get(path);
if (node == null)
{
path = ArchivePaths.create(name);
node = archive.get(path);
}
return node;
}
private String path(final String... parts)
{
final StringBuilder builder = new StringBuilder(parts[0]);
for (int i = 1; i < parts.length; i++)
{
if (!parts[i - 1].endsWith("/") && !parts[i].startsWith("/"))
{
builder.append("/");
}
builder.append(parts[i]);
}
return builder.toString();
}
public void close() throws IOException
{
synchronized (this)
{
for (final InputStream stream : openedStreams)
{
try
{
stream.close();
}
catch (final Exception e)
{
// no-op
}
}
openedStreams.clear();
}
}
protected class ArchiveStreamHandler extends URLStreamHandler
{
@Override
protected URLConnection openConnection(final URL u) throws IOException
{
return new URLConnection(u)
{
@Override
public void connect() throws IOException
{
// no-op
}
@Override
public InputStream getInputStream() throws IOException
{
final ArchivePath path = convertToArchivePath(u);
Node node = archive.get(prefix + path.get());
if (node == null && !prefix.isEmpty())
{ // WEB-INF/lib/x.jar!*
node = archive.get(path);
}
// SHRINKWRAP-308
if (node == null)
{
throw new FileNotFoundException("Requested path: " + path + " does not exist in " + archive.toString());
}
final Asset asset = node.getAsset();
if (asset == null)
{
return null;
}
final InputStream input = asset.openStream();
synchronized (this)
{
openedStreams.add(input);
}
return input;
}
private ArchivePath convertToArchivePath(final URL url)
{
return ArchivePaths.create(url.getPath().replace(archive.getName(), ""));
}
};
}
}
}