/*
* JBoss, Home of Professional Open Source
* Copyright 2010, 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.seam.solder.resourceLoader;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class ClasspathResourceLoader implements ResourceLoader
{
private static final Logger log = LoggerFactory.getLogger("org.jboss.seam.solder.resources");
ClasspathResourceLoader()
{
}
public InputStream getResourceAsStream(String name)
{
// Always use the strippedName, classloader always assumes no starting /
String strippedName = getStrippedName(name);
// Try to load from the TCCL
if (Thread.currentThread().getContextClassLoader() != null)
{
InputStream stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(strippedName);
if (stream != null)
{
log.trace("Loaded resource from context classloader: " + strippedName);
return stream;
}
}
// Try to load from the extension's classloader
else
{
InputStream stream = ResourceProducer.class.getResourceAsStream(strippedName);
if (stream != null)
{
log.trace("Loaded resource from Seam classloader: " + strippedName);
return stream;
}
}
return null;
}
public URL getResource(String name)
{
// Always use the strippedName, classloader always assumes no starting /
String strippedName = getStrippedName(name);
// Try to load from the TCCL
if (Thread.currentThread().getContextClassLoader() != null)
{
URL url = Thread.currentThread().getContextClassLoader().getResource(strippedName);
if (url != null)
{
log.trace("Loaded resource from context classloader: " + strippedName);
return url;
}
}
// Try to load from the extension's classloader
else
{
URL url = ResourceProducer.class.getResource(strippedName);
if (url != null)
{
log.trace("Loaded resource from Seam classloader: " + strippedName);
return url;
}
}
return null;
}
public Set<URL> getResources(String name)
{
Set<URL> urls = new HashSet<URL>();
// Always use the strippedName, classloader always assumes no starting /
String strippedName = getStrippedName(name);
// Try to load from the TCCL
if (Thread.currentThread().getContextClassLoader() != null)
{
try
{
Enumeration<URL> urlEnum = Thread.currentThread().getContextClassLoader().getResources(strippedName);
while (urlEnum.hasMoreElements())
{
urls.add(urlEnum.nextElement());
}
}
catch (IOException e)
{
// we are probably not going to recover from an IOException
throw new RuntimeException(e);
}
}
// Try to load from the extension's classloader
else
{
try
{
Enumeration<URL> urlEnum = ResourceProducer.class.getClassLoader().getResources(strippedName);
while (urlEnum.hasMoreElements())
{
urls.add(urlEnum.nextElement());
}
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
return urls;
}
public Collection<InputStream> getResourcesAsStream(String name)
{
Set<InputStream> resources = new HashSet<InputStream>();
// Always use the strippedName, classloader always assumes no starting /
String strippedName = getStrippedName(name);
// Try to load from the TCCL
if (Thread.currentThread().getContextClassLoader() != null)
{
try
{
Enumeration<URL> urlEnum = Thread.currentThread().getContextClassLoader().getResources(strippedName);
while (urlEnum.hasMoreElements())
{
resources.add(urlEnum.nextElement().openStream());
}
}
catch (IOException e)
{
// we are probably not going to recover from an IOException
throw new RuntimeException(e);
}
}
// Try to load from the extension's classloader
else
{
try
{
Enumeration<URL> urlEnum = ResourceProducer.class.getClassLoader().getResources(strippedName);
while (urlEnum.hasMoreElements())
{
resources.add(urlEnum.nextElement().openStream());
}
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
return resources;
}
public int getPrecedence()
{
return 10;
}
private static String getStrippedName(String name)
{
return name.startsWith("/") ? name.substring(1) : name;
}
}