rev 52310 : 8213031: (zipfs) Add support for POSIX file permissions

   1 /*
   2  * Copyright (c) 2009, 2014, 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.Files;
  30 import java.nio.file.FileStore;
  31 import java.nio.file.FileSystems;

  32 import java.nio.file.Path;
  33 import java.nio.file.attribute.BasicFileAttributes;
  34 import java.nio.file.attribute.FileAttributeView;
  35 import java.nio.file.attribute.FileStoreAttributeView;
  36 import java.nio.file.attribute.BasicFileAttributeView;
  37 import java.util.Formatter;
  38 
  39 /*
  40  *
  41  * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal
  42  */
  43 
  44 class ZipFileStore extends FileStore {
  45 
  46     private final ZipFileSystem zfs;
  47 
  48     ZipFileStore(ZipPath zpath) {
  49         this.zfs = zpath.getFileSystem();
  50     }
  51 
  52     @Override
  53     public String name() {
  54         return zfs.toString() + "/";
  55     }
  56 
  57     @Override
  58     public String type() {
  59         return "zipfs";
  60     }
  61 
  62     @Override
  63     public boolean isReadOnly() {
  64         return zfs.isReadOnly();
  65     }
  66 
  67     @Override
  68     public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
  69         return (type == BasicFileAttributeView.class ||

  70                 type == ZipFileAttributeView.class);
  71     }
  72 
  73     @Override
  74     public boolean supportsFileAttributeView(String name) {
  75         return name.equals("basic") || name.equals("zip");
  76     }
  77 
  78     @Override
  79     @SuppressWarnings("unchecked")
  80     public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
  81         if (type == null)
  82             throw new NullPointerException();
  83         return (V)null;
  84     }
  85 
  86     @Override
  87     public long getTotalSpace() throws IOException {
  88          return new ZipFileStoreAttributes(this).totalSpace();
  89     }
  90 
  91     @Override
  92     public long getUsableSpace() throws IOException {
  93          return new ZipFileStoreAttributes(this).usableSpace();
  94     }
  95 
  96     @Override
  97     public long getUnallocatedSpace() throws IOException {
  98          return new ZipFileStoreAttributes(this).unallocatedSpace();
  99     }
 100 
 101     @Override
 102     public Object getAttribute(String attribute) throws IOException {
 103          if (attribute.equals("totalSpace"))
 104                return getTotalSpace();
 105          if (attribute.equals("usableSpace"))
 106                return getUsableSpace();
 107          if (attribute.equals("unallocatedSpace"))
 108                return getUnallocatedSpace();
 109          throw new UnsupportedOperationException("does not support the given attribute");
 110     }
 111 
 112     private static class ZipFileStoreAttributes {
 113         final FileStore fstore;
 114         final long size;
 115 
 116         public ZipFileStoreAttributes(ZipFileStore fileStore)
 117             throws IOException
 118         {
 119             Path path = FileSystems.getDefault().getPath(fileStore.name());
 120             this.size = Files.size(path);
 121             this.fstore = Files.getFileStore(path);
 122         }
 123 
 124         public long totalSpace() {
 125             return size;
 126         }
 127 
 128         public long usableSpace() throws IOException {
 129             if (!fstore.isReadOnly())
 130                 return fstore.getUsableSpace();
 131             return 0;
 132         }
 133 
 134         public long unallocatedSpace()  throws IOException {
 135             if (!fstore.isReadOnly())
 136                 return fstore.getUnallocatedSpace();
 137             return 0;
 138         }
 139     }
 140 }
--- EOF ---