/*
* 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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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* 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.IOException;
import java.nio.file.Files;
import java.nio.file.FileStore;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileAttributeView;
import java.nio.file.attribute.FileStoreAttributeView;
import java.nio.file.attribute.BasicFileAttributeView;
import java.util.Formatter;
/*
*
* @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
*/
public class ZipFileStore extends FileStore {
private final ZipFileSystem zfs;
ZipFileStore(ZipPath zpath) {
this.zfs = (ZipFileSystem)zpath.getFileSystem();
}
@Override
public String name() {
return zfs.toString() + "/";
}
@Override
public String type() {
return "zipfs";
}
@Override
public boolean isReadOnly() {
return zfs.isReadOnly();
}
@Override
public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
return (type == BasicFileAttributeView.class ||
type == ZipFileAttributeView.class);
}
@Override
public boolean supportsFileAttributeView(String name) {
return name.equals("basic") || name.equals("zip");
}
@Override
@SuppressWarnings("unchecked")
public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
if (type == null)
throw new NullPointerException();
return (V)null;
}
@Override
public long getTotalSpace() throws IOException {
return new ZipFileStoreAttributes(this).totalSpace();
}
@Override
public long getUsableSpace() throws IOException {
return new ZipFileStoreAttributes(this).usableSpace();
}
@Override
public long getUnallocatedSpace() throws IOException {
return new ZipFileStoreAttributes(this).unallocatedSpace();
}
@Override
public Object getAttribute(String attribute) throws IOException {
if (attribute.equals("totalSpace"))
return getTotalSpace();
if (attribute.equals("usableSpace"))
return getUsableSpace();
if (attribute.equals("unallocatedSpace"))
return getUnallocatedSpace();
throw new UnsupportedOperationException("does not support the given attribute");
}
private static class ZipFileStoreAttributes {
final FileStore fstore;
final long size;
public ZipFileStoreAttributes(ZipFileStore fileStore)
throws IOException
{
Path path = FileSystems.getDefault().getPath(fileStore.name());
this.size = Files.size(path);
this.fstore = Files.getFileStore(path);
}
public long totalSpace() {
return size;
}
public long usableSpace() throws IOException {
if (!fstore.isReadOnly())
return fstore.getUsableSpace();
return 0;
}
public long unallocatedSpace() throws IOException {
if (!fstore.isReadOnly())
return fstore.getUnallocatedSpace();
return 0;
}
}
}