1 /* |
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2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * |
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4 * Redistribution and use in source and binary forms, with or without |
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5 * modification, are permitted provided that the following conditions |
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6 * are met: |
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7 * |
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8 * - Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * |
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11 * - Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * |
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15 * - Neither the name of Oracle nor the names of its |
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16 * contributors may be used to endorse or promote products derived |
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17 * from this software without specific prior written permission. |
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18 * |
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19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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30 */ |
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31 |
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32 /* |
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33 * This source code is provided to illustrate the usage of a given feature |
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34 * or technique and has been deliberately simplified. Additional steps |
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35 * required for a production-quality application, such as security checks, |
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36 * input validation and proper error handling, might not be present in |
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37 * this sample code. |
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38 */ |
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39 |
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40 |
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41 package com.sun.nio.zipfs; |
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42 |
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43 import java.io.IOException; |
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44 import java.nio.file.Files; |
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45 import java.nio.file.FileStore; |
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46 import java.nio.file.FileSystems; |
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47 import java.nio.file.Path; |
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48 import java.nio.file.attribute.BasicFileAttributes; |
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49 import java.nio.file.attribute.FileAttributeView; |
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50 import java.nio.file.attribute.FileStoreAttributeView; |
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51 import java.nio.file.attribute.BasicFileAttributeView; |
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52 import java.util.Formatter; |
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53 |
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54 /* |
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55 * |
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56 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal |
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57 */ |
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58 |
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59 public class ZipFileStore extends FileStore { |
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60 |
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61 private final ZipFileSystem zfs; |
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62 |
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63 ZipFileStore(ZipPath zpath) { |
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64 this.zfs = zpath.getFileSystem(); |
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65 } |
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66 |
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67 @Override |
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68 public String name() { |
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69 return zfs.toString() + "/"; |
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70 } |
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71 |
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72 @Override |
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73 public String type() { |
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74 return "zipfs"; |
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75 } |
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76 |
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77 @Override |
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78 public boolean isReadOnly() { |
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79 return zfs.isReadOnly(); |
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80 } |
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81 |
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82 @Override |
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83 public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) { |
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84 return (type == BasicFileAttributeView.class || |
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85 type == ZipFileAttributeView.class); |
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86 } |
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87 |
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88 @Override |
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89 public boolean supportsFileAttributeView(String name) { |
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90 return name.equals("basic") || name.equals("zip"); |
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91 } |
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92 |
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93 @Override |
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94 @SuppressWarnings("unchecked") |
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95 public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) { |
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96 if (type == null) |
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97 throw new NullPointerException(); |
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98 return (V)null; |
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99 } |
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100 |
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101 @Override |
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102 public long getTotalSpace() throws IOException { |
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103 return new ZipFileStoreAttributes(this).totalSpace(); |
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104 } |
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105 |
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106 @Override |
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107 public long getUsableSpace() throws IOException { |
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108 return new ZipFileStoreAttributes(this).usableSpace(); |
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109 } |
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110 |
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111 @Override |
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112 public long getUnallocatedSpace() throws IOException { |
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113 return new ZipFileStoreAttributes(this).unallocatedSpace(); |
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114 } |
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115 |
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116 @Override |
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117 public Object getAttribute(String attribute) throws IOException { |
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118 if (attribute.equals("totalSpace")) |
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119 return getTotalSpace(); |
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120 if (attribute.equals("usableSpace")) |
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121 return getUsableSpace(); |
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122 if (attribute.equals("unallocatedSpace")) |
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123 return getUnallocatedSpace(); |
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124 throw new UnsupportedOperationException("does not support the given attribute"); |
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125 } |
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126 |
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127 private static class ZipFileStoreAttributes { |
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128 final FileStore fstore; |
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129 final long size; |
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130 |
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131 public ZipFileStoreAttributes(ZipFileStore fileStore) |
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132 throws IOException |
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133 { |
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134 Path path = FileSystems.getDefault().getPath(fileStore.name()); |
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135 this.size = Files.size(path); |
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136 this.fstore = Files.getFileStore(path); |
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137 } |
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138 |
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139 public long totalSpace() { |
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140 return size; |
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141 } |
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142 |
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143 public long usableSpace() throws IOException { |
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144 if (!fstore.isReadOnly()) |
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145 return fstore.getUsableSpace(); |
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146 return 0; |
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147 } |
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148 |
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149 public long unallocatedSpace() throws IOException { |
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150 if (!fstore.isReadOnly()) |
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151 return fstore.getUnallocatedSpace(); |
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152 return 0; |
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153 } |
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154 } |
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155 } |
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