/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.weld;
import org.jboss.modules.Module;
import org.jboss.weld.resources.spi.ResourceLoader;
import org.jboss.weld.resources.spi.ResourceLoadingException;
import java.net.URL;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* A {@link ResourceLoader} that can load classes from a {@link Module}
* <p>
* Thread Safety: This class is thread safe, and does not require a happens before even between construction and usage
*
* @author Stuart Douglas
*
*/
public class WeldModuleResourceLoader implements ResourceLoader {
private final Module module;
/**
* Additional classes that have been added to the bean archive by the container or by a portable extension
*/
private final Map<String, Class<?>> classes;
public WeldModuleResourceLoader(Module module) {
this.module = module;
this.classes = new ConcurrentHashMap<String, Class<?>>();
}
/**
* If the class name is found in addtionalClasses then return it.
*
* Otherwise the class will be loaded from the module ClassLoader
*/
@Override
public Class<?> classForName(String name) {
try {
if (classes.containsKey(name)) {
return classes.get(name);
}
final Class<?> clazz = module.getClassLoader().loadClass(name);
classes.put(name, clazz);
return clazz;
} catch (NoClassDefFoundError e) {
throw new ResourceLoadingException(e);
} catch (ClassNotFoundException e) {
throw new ResourceLoadingException(e);
} catch (LinkageError e) {
throw new ResourceLoadingException(e);
}
}
public void addAdditionalClass(Class<?> clazz) {
this.classes.put(clazz.getName(), clazz);
}
/**
* Loads a resource from the module class loader
*/
@Override
public URL getResource(String name) {
try {
return module.getClassLoader().getResource(name);
} catch (Exception e) {
throw new ResourceLoadingException(e);
}
}
/**
* Loads resources from the module class loader
*/
@Override
public Collection<URL> getResources(String name) {
try {
final HashSet<URL> resources = new HashSet<URL>();
Enumeration<URL> urls = module.getClassLoader().getResources(name);
while (urls.hasMoreElements()) {
resources.add(urls.nextElement());
}
return resources;
} catch (Exception e) {
throw new ResourceLoadingException(e);
}
}
@Override
public void cleanup() {
// nop
}
}