org.eclipse.jetty.util.resource.PathResource Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.util.resource;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.nio.file.DirectoryIteratorException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.InvalidPathException;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.nio.file.StandardOpenOption;
import java.nio.file.attribute.FileTime;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* Java NIO Path equivalent of FileResource.
*/
public class PathResource extends Resource
{
private static final Logger LOG = Log.getLogger(PathResource.class);
private final Path path;
private final URI uri;
private LinkOption linkOptions[] = new LinkOption[] { LinkOption.NOFOLLOW_LINKS };
public PathResource(File file)
{
this(file.toPath());
}
public PathResource(Path path)
{
this.path = path;
this.uri = this.path.toUri();
}
public PathResource(URI uri) throws IOException
{
if (!uri.isAbsolute())
{
throw new IllegalArgumentException("not an absolute uri");
}
if (!uri.getScheme().equalsIgnoreCase("file"))
{
throw new IllegalArgumentException("not file: scheme");
}
Path path;
try
{
path = new File(uri).toPath();
}
catch (InvalidPathException e)
{
throw e;
}
catch (IllegalArgumentException e)
{
throw e;
}
catch (Exception e)
{
LOG.ignore(e);
throw new IOException("Unable to build Path from: " + uri,e);
}
this.path = path;
this.uri = path.toUri();
}
public PathResource(URL url) throws IOException, URISyntaxException
{
this(url.toURI());
}
@Override
public Resource addPath(String apath) throws IOException, MalformedURLException
{
return new PathResource(this.path.resolve(apath));
}
@Override
public void close()
{
// not applicable for FileSytem / Path
}
@Override
public boolean delete() throws SecurityException
{
try
{
return Files.deleteIfExists(path);
}
catch (IOException e)
{
LOG.ignore(e);
return false;
}
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
{
return true;
}
if (obj == null)
{
return false;
}
if (getClass() != obj.getClass())
{
return false;
}
PathResource other = (PathResource)obj;
if (path == null)
{
if (other.path != null)
{
return false;
}
}
else if (!path.equals(other.path))
{
return false;
}
return true;
}
@Override
public boolean exists()
{
return Files.exists(path,linkOptions);
}
@Override
public File getFile() throws IOException
{
return path.toFile();
}
public boolean getFollowLinks()
{
return (linkOptions != null) && (linkOptions.length > 0) && (linkOptions[0] == LinkOption.NOFOLLOW_LINKS);
}
@Override
public InputStream getInputStream() throws IOException
{
return Files.newInputStream(path,StandardOpenOption.READ);
}
@Override
public String getName()
{
return path.toAbsolutePath().toString();
}
@Override
public ReadableByteChannel getReadableByteChannel() throws IOException
{
return FileChannel.open(path,StandardOpenOption.READ);
}
@Override
public URI getURI()
{
return this.uri;
}
@Override
public URL getURL()
{
try
{
return path.toUri().toURL();
}
catch (MalformedURLException e)
{
return null;
}
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = (prime * result) + ((path == null)?0:path.hashCode());
return result;
}
@Override
public boolean isContainedIn(Resource r) throws MalformedURLException
{
// not applicable for FileSystem / path
return false;
}
@Override
public boolean isDirectory()
{
return Files.isDirectory(path,linkOptions);
}
@Override
public long lastModified()
{
try
{
FileTime ft = Files.getLastModifiedTime(path,linkOptions);
return ft.toMillis();
}
catch (IOException e)
{
LOG.ignore(e);
return 0;
}
}
@Override
public long length()
{
try
{
return Files.size(path);
}
catch (IOException e)
{
// in case of error, use File.length logic of 0L
return 0L;
}
}
@Override
public URI getAlias()
{
if (Files.isSymbolicLink(path))
{
try
{
return path.toRealPath().toUri();
}
catch (IOException e)
{
LOG.debug(e);
return null;
}
}
else
{
return null;
}
}
@Override
public String[] list()
{
try (DirectoryStream dir = Files.newDirectoryStream(path))
{
List entries = new ArrayList<>();
for (Path entry : dir)
{
String name = entry.getFileName().toString();
if (Files.isDirectory(entry))
{
name += "/";
}
entries.add(name);
}
int size = entries.size();
return entries.toArray(new String[size]);
}
catch (DirectoryIteratorException e)
{
LOG.debug(e);
}
catch (IOException e)
{
LOG.debug(e);
}
return null;
}
@Override
public boolean renameTo(Resource dest) throws SecurityException
{
if (dest instanceof PathResource)
{
PathResource destRes = (PathResource)dest;
try
{
Path result = Files.move(path,destRes.path,StandardCopyOption.ATOMIC_MOVE);
return Files.exists(result,linkOptions);
}
catch (IOException e)
{
LOG.ignore(e);
return false;
}
}
else
{
return false;
}
}
public void setFollowLinks(boolean followLinks)
{
if (followLinks)
{
linkOptions = new LinkOption[0];
}
else
{
linkOptions = new LinkOption[] { LinkOption.NOFOLLOW_LINKS };
}
}
}