1 /* 2 * Copyright (c) 2008, 2011, 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 sun.nio.fs; 27 28 import java.nio.file.attribute.*; 29 import java.util.*; 30 import java.io.IOException; 31 32 /** 33 * Base implementation of BasicFileAttributeView 34 */ 35 36 abstract class AbstractBasicFileAttributeView 37 implements BasicFileAttributeView, DynamicFileAttributeView 38 { 39 private static final String SIZE_NAME = "size"; 40 private static final String CREATION_TIME_NAME = "creationTime"; 41 private static final String LAST_ACCESS_TIME_NAME = "lastAccessTime"; 42 private static final String LAST_MODIFIED_TIME_NAME = "lastModifiedTime"; 43 private static final String FILE_KEY_NAME = "fileKey"; 44 private static final String IS_DIRECTORY_NAME = "isDirectory"; 45 private static final String IS_REGULAR_FILE_NAME = "isRegularFile"; 46 private static final String IS_SYMBOLIC_LINK_NAME = "isSymbolicLink"; 47 private static final String IS_OTHER_NAME = "isOther"; 48 49 // the names of the basic attributes 50 static final Set<String> basicAttributeNames = 51 Util.newSet(SIZE_NAME, 52 CREATION_TIME_NAME, 53 LAST_ACCESS_TIME_NAME, 54 LAST_MODIFIED_TIME_NAME, 55 FILE_KEY_NAME, 56 IS_DIRECTORY_NAME, 57 IS_REGULAR_FILE_NAME, 58 IS_SYMBOLIC_LINK_NAME, 59 IS_OTHER_NAME); 60 61 protected AbstractBasicFileAttributeView() { } 62 63 @Override 64 public String name() { 65 return "basic"; 66 } 67 68 @Override 69 public void setAttribute(String attribute, Object value) 70 throws IOException 71 { 72 if (attribute.equals(LAST_MODIFIED_TIME_NAME)) { 73 setTimes((FileTime)value, null, null); 74 return; 75 } 76 if (attribute.equals(LAST_ACCESS_TIME_NAME)) { 77 setTimes(null, (FileTime)value, null); 78 return; 79 } 80 if (attribute.equals(CREATION_TIME_NAME)) { 81 setTimes(null, null, (FileTime)value); 82 return; 83 } 84 throw new IllegalArgumentException("'" + name() + ":" + 85 attribute + "' not recognized"); 86 } 87 88 /** 89 * Used to build a map of attribute name/values. 90 */ 91 static class AttributesBuilder { 92 private Set<String> names = new HashSet<>(); 93 private Map<String,Object> map = new HashMap<>(); 94 private boolean copyAll; 95 96 private AttributesBuilder(Set<String> allowed, String[] requested) { 97 for (String name: requested) { 98 if (name.equals("*")) { 99 copyAll = true; 100 } else { 101 if (!allowed.contains(name)) 102 throw new IllegalArgumentException("'" + name + "' not recognized"); 103 names.add(name); 104 } 105 } 106 } 107 108 /** 109 * Creates builder to build up a map of the matching attributes 110 */ 111 static AttributesBuilder create(Set<String> allowed, String[] requested) { 112 return new AttributesBuilder(allowed, requested); 113 } 114 115 /** 116 * Returns true if the attribute should be returned in the map 117 */ 118 boolean match(String name) { 119 return copyAll || names.contains(name); 120 } 121 122 void add(String name, Object value) { 123 map.put(name, value); 124 } 125 126 /** 127 * Returns the map. Discard all references to the AttributesBuilder 128 * after invoking this method. 129 */ 130 Map<String,Object> unmodifiableMap() { 131 return Collections.unmodifiableMap(map); 132 } 133 } 134 135 /** 136 * Invoked by readAttributes or sub-classes to add all matching basic 137 * attributes to the builder 138 */ 139 final void addRequestedBasicAttributes(BasicFileAttributes attrs, 140 AttributesBuilder builder) 141 { 142 if (builder.match(SIZE_NAME)) 143 builder.add(SIZE_NAME, attrs.size()); 144 if (builder.match(CREATION_TIME_NAME)) 145 builder.add(CREATION_TIME_NAME, attrs.creationTime()); 146 if (builder.match(LAST_ACCESS_TIME_NAME)) 147 builder.add(LAST_ACCESS_TIME_NAME, attrs.lastAccessTime()); 148 if (builder.match(LAST_MODIFIED_TIME_NAME)) 149 builder.add(LAST_MODIFIED_TIME_NAME, attrs.lastModifiedTime()); 150 if (builder.match(FILE_KEY_NAME)) 151 builder.add(FILE_KEY_NAME, attrs.fileKey()); 152 if (builder.match(IS_DIRECTORY_NAME)) 153 builder.add(IS_DIRECTORY_NAME, attrs.isDirectory()); 154 if (builder.match(IS_REGULAR_FILE_NAME)) 155 builder.add(IS_REGULAR_FILE_NAME, attrs.isRegularFile()); 156 if (builder.match(IS_SYMBOLIC_LINK_NAME)) 157 builder.add(IS_SYMBOLIC_LINK_NAME, attrs.isSymbolicLink()); 158 if (builder.match(IS_OTHER_NAME)) 159 builder.add(IS_OTHER_NAME, attrs.isOther()); 160 } 161 162 @Override 163 public Map<String,Object> readAttributes(String[] requested) 164 throws IOException 165 { 166 AttributesBuilder builder = 167 AttributesBuilder.create(basicAttributeNames, requested); 168 addRequestedBasicAttributes(readAttributes(), builder); 169 return builder.unmodifiableMap(); 170 } 171 } 172
