1 /* 2 * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nio.zipfs; 27 28 import java.io.IOException; 29 import java.nio.file.FileStore; 30 import java.nio.file.FileSystems; 31 import java.nio.file.Files; 32 import java.nio.file.Path; 33 import java.nio.file.attribute.BasicFileAttributeView; 34 import java.nio.file.attribute.FileAttributeView; 35 import java.nio.file.attribute.FileStoreAttributeView; 36 37 /** 38 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal 39 */ 40 class ZipFileStore extends FileStore { 41 42 private final ZipFileSystem zfs; 43 44 ZipFileStore(ZipPath zpath) { 45 this.zfs = zpath.getFileSystem(); 46 } 47 48 @Override 49 public String name() { 50 return zfs.toString() + "/"; 51 } 52 53 @Override 54 public String type() { 55 return "zipfs"; 56 } 57 58 @Override 59 public boolean isReadOnly() { 60 return zfs.isReadOnly(); 61 } 62 63 @Override 64 public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) { 65 return (type == BasicFileAttributeView.class || 66 type == ZipFileAttributeView.class); 67 } 68 69 @Override 70 public boolean supportsFileAttributeView(String name) { 71 return name.equals("basic") || name.equals("zip"); 72 } 73 74 @Override 75 public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) { 76 if (type == null) 77 throw new NullPointerException(); 78 return (V)null; 79 } 80 81 @Override 82 public long getTotalSpace() throws IOException { 83 return new ZipFileStoreAttributes(this).totalSpace(); 84 } 85 86 @Override 87 public long getUsableSpace() throws IOException { 88 return new ZipFileStoreAttributes(this).usableSpace(); 89 } 90 91 @Override 92 public long getUnallocatedSpace() throws IOException { 93 return new ZipFileStoreAttributes(this).unallocatedSpace(); 94 } 95 96 @Override 97 public Object getAttribute(String attribute) throws IOException { 98 if (attribute.equals("totalSpace")) 99 return getTotalSpace(); 100 if (attribute.equals("usableSpace")) 101 return getUsableSpace(); 102 if (attribute.equals("unallocatedSpace")) 103 return getUnallocatedSpace(); 104 throw new UnsupportedOperationException("does not support the given attribute"); 105 } 106 107 private static class ZipFileStoreAttributes { 108 final FileStore fstore; 109 final long size; 110 111 public ZipFileStoreAttributes(ZipFileStore fileStore) 112 throws IOException 113 { 114 Path path = FileSystems.getDefault().getPath(fileStore.name()); 115 this.size = Files.size(path); 116 this.fstore = Files.getFileStore(path); 117 } 118 119 public long totalSpace() { 120 return size; 121 } 122 123 public long usableSpace() throws IOException { 124 if (!fstore.isReadOnly()) 125 return fstore.getUsableSpace(); 126 return 0; 127 } 128 129 public long unallocatedSpace() throws IOException { 130 if (!fstore.isReadOnly()) 131 return fstore.getUnallocatedSpace(); 132 return 0; 133 } 134 } 135 }