/*
* Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.nio.zipfs;
import java.io.*;
import java.nio.channels.*;
import java.nio.file.*;
import java.nio.file.DirectoryStream.Filter;
import java.nio.file.attribute.*;
import java.nio.file.spi.FileSystemProvider;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.zip.ZipError;
import java.util.concurrent.ExecutorService;
/*
*
* @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
*/
public class ZipFileSystemProvider extends FileSystemProvider {
private final Map<Path, ZipFileSystem> filesystems = new HashMap<>();
public ZipFileSystemProvider() {}
@Override
public String getScheme() {
return "jar";
}
protected Path uriToPath(URI uri) {
String scheme = uri.getScheme();
if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
}
try {
// only support legacy JAR URL syntax jar:{uri}!/{entry} for now
String spec = uri.getSchemeSpecificPart();
int sep = spec.indexOf("!/");
if (sep != -1)
spec = spec.substring(0, sep);
return Paths.get(new URI(spec)).toAbsolutePath();
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e.getMessage(), e);
}
}
private boolean ensureFile(Path path) {
try {
BasicFileAttributes attrs =
Files.readAttributes(path, BasicFileAttributes.class);
if (!attrs.isRegularFile())
throw new UnsupportedOperationException();
return true;
} catch (IOException ioe) {
return false;
}
}
@Override
public FileSystem newFileSystem(URI uri, Map<String, ?> env)
throws IOException
{
Path path = uriToPath(uri);
synchronized(filesystems) {
Path realPath = null;
if (ensureFile(path)) {
realPath = path.toRealPath();
if (filesystems.containsKey(realPath))
throw new FileSystemAlreadyExistsException();
}
ZipFileSystem zipfs = null;
try {
zipfs = new ZipFileSystem(this, path, env);
} catch (ZipError ze) {
String pname = path.toString();
if (pname.endsWith(".zip") || pname.endsWith(".jar"))
throw ze;
// assume NOT a zip/jar file
throw new UnsupportedOperationException();
}
filesystems.put(realPath, zipfs);
return zipfs;
}
}
@Override
public FileSystem newFileSystem(Path path, Map<String, ?> env)
throws IOException
{
if (path.getFileSystem() != FileSystems.getDefault()) {
throw new UnsupportedOperationException();
}
ensureFile(path);
try {
return new ZipFileSystem(this, path, env);
} catch (ZipError ze) {
String pname = path.toString();
if (pname.endsWith(".zip") || pname.endsWith(".jar"))
throw ze;
throw new UnsupportedOperationException();
}
}
@Override
public Path getPath(URI uri) {
String spec = uri.getSchemeSpecificPart();
int sep = spec.indexOf("!/");
if (sep == -1)
throw new IllegalArgumentException("URI: "
+ uri
+ " does not contain path info ex. jar:file:/c:/foo.zip!/BAR");
return getFileSystem(uri).getPath(spec.substring(sep + 1));
}
@Override
public FileSystem getFileSystem(URI uri) {
synchronized (filesystems) {
ZipFileSystem zipfs = null;
try {
zipfs = filesystems.get(uriToPath(uri).toRealPath());
} catch (IOException x) {
// ignore the ioe from toRealPath(), return FSNFE
}
if (zipfs == null)
throw new FileSystemNotFoundException();
return zipfs;
}
}
// Checks that the given file is a UnixPath
static final ZipPath toZipPath(Path path) {
if (path == null)
throw new NullPointerException();
if (!(path instanceof ZipPath))
throw new ProviderMismatchException();
return (ZipPath)path;
}
@Override
public void checkAccess(Path path, AccessMode... modes) throws IOException {
toZipPath(path).checkAccess(modes);
}
@Override
public void copy(Path src, Path target, CopyOption... options)
throws IOException
{
toZipPath(src).copy(toZipPath(target), options);
}
@Override
public void createDirectory(Path path, FileAttribute<?>... attrs)
throws IOException
{
toZipPath(path).createDirectory(attrs);
}
@Override
public final void delete(Path path) throws IOException {
toZipPath(path).delete();
}
@Override
@SuppressWarnings("unchecked")
public <V extends FileAttributeView> V
getFileAttributeView(Path path, Class<V> type, LinkOption... options)
{
return (V)ZipFileAttributeView.get(toZipPath(path), type);
}
@Override
public FileStore getFileStore(Path path) throws IOException {
return toZipPath(path).getFileStore();
}
@Override
public boolean isHidden(Path path) {
return toZipPath(path).isHidden();
}
@Override
public boolean isSameFile(Path path, Path other) throws IOException {
return toZipPath(path).isSameFile(other);
}
@Override
public void move(Path src, Path target, CopyOption... options)
throws IOException
{
toZipPath(src).move(toZipPath(target), options);
}
@Override
public AsynchronousFileChannel newAsynchronousFileChannel(Path path,
Set<? extends OpenOption> options,
ExecutorService exec,
FileAttribute<?>... attrs)
throws IOException
{
throw new UnsupportedOperationException();
}
@Override
public SeekableByteChannel newByteChannel(Path path,
Set<? extends OpenOption> options,
FileAttribute<?>... attrs)
throws IOException
{
return toZipPath(path).newByteChannel(options, attrs);
}
@Override
public DirectoryStream<Path> newDirectoryStream(
Path path, Filter<? super Path> filter) throws IOException
{
return toZipPath(path).newDirectoryStream(filter);
}
@Override
public FileChannel newFileChannel(Path path,
Set<? extends OpenOption> options,
FileAttribute<?>... attrs)
throws IOException
{
return toZipPath(path).newFileChannel(options, attrs);
}
@Override
public InputStream newInputStream(Path path, OpenOption... options)
throws IOException
{
return toZipPath(path).newInputStream(options);
}
@Override
public OutputStream newOutputStream(Path path, OpenOption... options)
throws IOException
{
return toZipPath(path).newOutputStream(options);
}
@Override
public <A extends BasicFileAttributes> A
readAttributes(Path path, Class<A> type, LinkOption... options)
throws IOException
{
if (type == BasicFileAttributes.class || type == ZipFileAttributes.class)
return (A)toZipPath(path).getAttributes();
return null;
}
@Override
public Map<String, Object>
readAttributes(Path path, String attribute, LinkOption... options)
throws IOException
{
return toZipPath(path).readAttributes(attribute, options);
}
@Override
public Path readSymbolicLink(Path link) throws IOException {
throw new UnsupportedOperationException("Not supported.");
}
@Override
public void setAttribute(Path path, String attribute,
Object value, LinkOption... options)
throws IOException
{
toZipPath(path).setAttribute(attribute, value, options);
}
//////////////////////////////////////////////////////////////
void removeFileSystem(Path zfpath, ZipFileSystem zfs) throws IOException {
synchronized (filesystems) {
zfpath = zfpath.toRealPath();
if (filesystems.get(zfpath) == zfs)
filesystems.remove(zfpath);
}
}
}