/*
* 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;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemOptions;
import org.apache.commons.vfs.FileType;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
/**
* A default URL stream handler that will work for most file systems.
*
* @author <a href="mailto:brian@mmmanager.org">Brian Olsen</a>
*/
public class DefaultURLStreamHandler
extends URLStreamHandler
{
private final VfsComponentContext context;
private final FileSystemOptions fileSystemOptions;
public DefaultURLStreamHandler(final VfsComponentContext context)
{
this(context, null);
}
public DefaultURLStreamHandler(final VfsComponentContext context, final FileSystemOptions fileSystemOptions)
{
this.context = context;
this.fileSystemOptions = fileSystemOptions;
}
protected URLConnection openConnection(final URL url)
throws IOException
{
final FileObject entry = context.resolveFile(url.toExternalForm(), fileSystemOptions);
return new DefaultURLConnection(url, entry.getContent());
}
protected void parseURL(final URL u,
final String spec,
final int start,
final int limit)
{
try
{
FileObject old = context.resolveFile(u.toExternalForm(), fileSystemOptions);
FileObject newURL;
if (start > 0 && spec.charAt(start - 1) == ':')
{
newURL = context.resolveFile(old, spec, fileSystemOptions);
}
else
{
if (old.getType() == FileType.FILE && old.getParent() != null)
{
// for files we have to resolve relative
newURL = old.getParent().resolveFile(spec);
}
else
{
newURL = old.resolveFile(spec);
}
}
final String url = newURL.getName().getURI();
final StringBuffer filePart = new StringBuffer();
final String protocolPart = UriParser.extractScheme(url, filePart);
setURL(u, protocolPart, "", -1, null, null, filePart.toString(), null, null);
}
catch (FileSystemException fse)
{
// This is rethrown to MalformedURLException in URL anyway
throw new RuntimeException(fse.getMessage());
}
}
protected String toExternalForm(final URL u)
{
return u.getProtocol() + ":" + u.getFile();
}
}