/*
 * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.nio.zipfs;

import java.io.IOException;
import java.nio.file.FileStore;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributeView;
import java.nio.file.attribute.FileAttributeView;
import java.nio.file.attribute.FileStoreAttributeView;

Author:Xueming Shen, Rajendra Gutupalli, Jaya Hangal
/** * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal */
class ZipFileStore extends FileStore { private final ZipFileSystem zfs; ZipFileStore(ZipPath zpath) { this.zfs = 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 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; } } }