1 /*
2 * Copyright (c) 2008, 2009, 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 protected AbstractBasicFileAttributeView() { }
50
51 @Override
52 public String name() {
53 return "basic";
54 }
55
56 @Override
57 public void setAttribute(String attribute, Object value)
58 throws IOException
59 {
60 if (attribute.equals(LAST_MODIFIED_TIME_NAME)) {
61 setTimes((FileTime)value, null, null);
62 return;
63 }
64 if (attribute.equals(LAST_ACCESS_TIME_NAME)) {
65 setTimes(null, (FileTime)value, null);
66 return;
67 }
68 if (attribute.equals(CREATION_TIME_NAME)) {
69 setTimes(null, null, (FileTime)value);
70 return;
71 }
72 throw new UnsupportedOperationException("'" + attribute +
73 "' is unknown or read-only attribute");
74 }
75
76 /**
77 * Used to build a map of attribute name/values.
78 */
79 static class AttributesBuilder {
80 private Set<String> set = new HashSet<>();
81 private Map<String,Object> map = new HashMap<>();
82 private boolean copyAll;
83
84 private AttributesBuilder(String[] attributes) {
85 for (String attribute: attributes) {
86 if (attribute.equals("*")) {
87 copyAll = true;
88 } else {
89 set.add(attribute);
90 }
91 }
92 }
93
94 /**
95 * Creates builder to build up a map of the matching attributes
96 */
97 static AttributesBuilder create(String[] attributes) {
98 return new AttributesBuilder(attributes);
99 }
100
101 /**
102 * Returns true if the attribute should be returned in the map
103 */
104 boolean match(String attribute) {
105 if (copyAll)
106 return true;
107 return set.contains(attribute);
108 }
109
110 void add(String attribute, Object value) {
111 map.put(attribute, value);
112 }
113
114 /**
115 * Returns the map. Discard all references to the AttributesBuilder
116 * after invoking this method.
117 */
118 Map<String,Object> unmodifiableMap() {
119 return Collections.unmodifiableMap(map);
120 }
121 }
122
123 /**
124 * Invoked by readAttributes or sub-classes to add all matching basic
125 * attributes to the builder
126 */
127 final void addBasicAttributesToBuilder(BasicFileAttributes attrs,
128 AttributesBuilder builder)
129 {
130 if (builder.match(SIZE_NAME))
131 builder.add(SIZE_NAME, attrs.size());
132 if (builder.match(CREATION_TIME_NAME))
133 builder.add(CREATION_TIME_NAME, attrs.creationTime());
134 if (builder.match(LAST_ACCESS_TIME_NAME))
135 builder.add(LAST_ACCESS_TIME_NAME, attrs.lastAccessTime());
136 if (builder.match(LAST_MODIFIED_TIME_NAME))
137 builder.add(LAST_MODIFIED_TIME_NAME, attrs.lastModifiedTime());
138 if (builder.match(FILE_KEY_NAME))
139 builder.add(FILE_KEY_NAME, attrs.fileKey());
140 if (builder.match(IS_DIRECTORY_NAME))
141 builder.add(IS_DIRECTORY_NAME, attrs.isDirectory());
142 if (builder.match(IS_REGULAR_FILE_NAME))
143 builder.add(IS_REGULAR_FILE_NAME, attrs.isRegularFile());
144 if (builder.match(IS_SYMBOLIC_LINK_NAME))
145 builder.add(IS_SYMBOLIC_LINK_NAME, attrs.isSymbolicLink());
146 if (builder.match(IS_OTHER_NAME))
147 builder.add(IS_OTHER_NAME, attrs.isOther());
148 }
149
150 @Override
151 public Map<String,Object> readAttributes(String[] attributes) throws IOException {
152 AttributesBuilder builder = AttributesBuilder.create(attributes);
153 addBasicAttributesToBuilder(readAttributes(), builder);
154 return builder.unmodifiableMap();
155 }
156 }