/*
* Copyright 2002-2005 The Apache Software Foundation.
*
* 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.apache.commons.vfs.provider.res;
import org.apache.commons.vfs.Capability;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSystem;
import org.apache.commons.vfs.FileSystemConfigBuilder;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemOptions;
import org.apache.commons.vfs.provider.AbstractFileProvider;
import org.apache.commons.vfs.provider.UriParser;
import java.net.URL;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
/**
* Description
*
* @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
*/
public class ResourceFileProvider extends AbstractFileProvider
{
protected final static Collection capabilities = Collections.unmodifiableCollection(Arrays.asList(new Capability[]
{
Capability.DISPATCHER
}));
public ResourceFileProvider()
{
super();
}
/**
* Locates a file object, by absolute URI.
*/
public FileObject findFile(final FileObject baseFile,
final String uri,
final FileSystemOptions fileSystemOptions)
throws FileSystemException
{
StringBuffer buf = new StringBuffer(80);
UriParser.extractScheme(uri, buf);
String resourceName = buf.toString();
ClassLoader cl = ResourceFileSystemConfigBuilder.getInstance().getClassLoader(fileSystemOptions);
if (cl == null)
{
cl = getClass().getClassLoader();
}
final URL url = cl.getResource(resourceName);
if (url == null)
{
throw new FileSystemException("vfs.provider.url/badly-formed-uri.error", uri);
}
FileObject fo = getContext().getFileSystemManager().resolveFile(url.toExternalForm());
return fo;
}
public FileSystemConfigBuilder getConfigBuilder()
{
return org.apache.commons.vfs.provider.res.ResourceFileSystemConfigBuilder.getInstance();
}
public void closeFileSystem(FileSystem filesystem)
{
// no filesystem created here - so nothing to do
}
public Collection getCapabilities()
{
return capabilities;
}
}