/*
* 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.temp;
import org.apache.commons.vfs.FileName;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSystem;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemOptions;
import org.apache.commons.vfs.FileType;
import org.apache.commons.vfs.provider.AbstractFileProvider;
import org.apache.commons.vfs.provider.FileProvider;
import org.apache.commons.vfs.provider.UriParser;
import org.apache.commons.vfs.provider.local.DefaultLocalFileProvider;
import org.apache.commons.vfs.provider.local.LocalFileSystem;
import java.io.File;
import java.util.Collection;
/**
* A provider for temporary files.
*
* @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
*/
public class TemporaryFileProvider
extends AbstractFileProvider
implements FileProvider, Comparable
{
private File rootFile;
/*
private final static FileName tmpFileName = new AbstractFileName("tmp", "/")
{
protected FileName createName(String absPath)
{
return null;
}
protected void appendRootUri(StringBuffer buffer)
{
}
};
*/
public TemporaryFileProvider(final File rootFile)
{
this();
this.rootFile = rootFile;
}
public TemporaryFileProvider()
{
super();
}
public int compareTo(Object o)
{
int h1 = hashCode();
int h2 = o.hashCode();
if (h1 < h2)
{
return -1;
}
if (h1 > h2)
{
return 1;
}
return 0;
}
/**
* Locates a file object, by absolute URI.
*/
public synchronized FileObject findFile(final FileObject baseFile, final String uri, final FileSystemOptions properties)
throws FileSystemException
{
// Parse the name
final StringBuffer buffer = new StringBuffer(uri);
final String scheme = UriParser.extractScheme(uri, buffer);
UriParser.fixSeparators(buffer);
FileType fileType = UriParser.normalisePath(buffer);
final String path = buffer.toString();
// Create the temp file system if it does not exist
// FileSystem filesystem = findFileSystem( this, (Properties) null);
FileSystem filesystem = findFileSystem(this, properties);
if (filesystem == null)
{
if (rootFile == null)
{
rootFile = getContext().getTemporaryFileStore().allocateFile("tempfs");
}
final FileName rootName =
getContext().parseURI(scheme + ":" + FileName.ROOT_PATH);
// final FileName rootName =
// new LocalFileName(scheme, scheme + ":", FileName.ROOT_PATH);
filesystem = new LocalFileSystem(rootName, rootFile.getAbsolutePath(), properties);
addFileSystem(this, filesystem);
}
// Find the file
return filesystem.resolveFile(path);
}
public Collection getCapabilities()
{
return DefaultLocalFileProvider.capabilities;
}
}