1 /*
2 * Copyright (c) 2016, 2024, 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 package jdk.internal.jrtfs;
26
27 import java.nio.file.attribute.BasicFileAttributes;
28 import java.nio.file.attribute.FileTime;
29 import java.util.Formatter;
30 import jdk.internal.jimage.ImageReader.Node;
31
32 /**
33 * File attributes implementation for jrt image file system.
34 *
35 * @implNote This class needs to maintain JDK 8 source compatibility.
36 *
37 * It is used internally in the JDK to implement jimage/jrtfs access,
38 * but also compiled and delivered as part of the jrtfs.jar to support access
39 * to the jimage file provided by the shipped JDK by tools running on JDK 8.
40 */
41 final class JrtFileAttributes implements BasicFileAttributes {
42
43 private final Node node;
44
45 JrtFileAttributes(Node node) {
46 this.node = node;
47 }
48
49 //-------- basic attributes --------
50 @Override
51 public FileTime creationTime() {
52 return node.creationTime();
53 }
54
55 @Override
56 public boolean isDirectory() {
57 return node.isDirectory();
58 }
59
60 @Override
61 public boolean isOther() {
62 return false;
63 }
64
65 @Override
66 public boolean isRegularFile() {
67 return !isDirectory();
68 }
69
70 @Override
71 public FileTime lastAccessTime() {
72 return node.lastAccessTime();
73 }
74
75 @Override
76 public FileTime lastModifiedTime() {
77 return node.lastModifiedTime();
78 }
79
80 @Override
81 public long size() {
82 return node.size();
83 }
84
85 @Override
86 public boolean isSymbolicLink() {
87 return node.isLink();
88 }
89
90 @Override
91 public Object fileKey() {
92 return node.resolveLink(true);
93 }
94
95 //-------- jrtfs specific attributes --------
96 /**
97 * Compressed resource file. If not available or not applicable, 0L is
98 * returned.
99 *
100 * @return the compressed resource size for compressed resources.
101 */
102 public long compressedSize() {
103 return node.compressedSize();
104 }
105
106 /**
107 * "file" extension of a file resource.
108 *
109 * @return extension string for the file resource
110 */
111 public String extension() {
112 return node.extension();
113 }
114
115 @Override
116 public final String toString() {
117 StringBuilder sb = new StringBuilder(1024);
118 try (Formatter fm = new Formatter(sb)) {
119 if (creationTime() != null) {
120 fm.format(" creationTime : %tc%n", creationTime().toMillis());
121 } else {
122 fm.format(" creationTime : null%n");
123 }
124 if (lastAccessTime() != null) {
125 fm.format(" lastAccessTime : %tc%n", lastAccessTime().toMillis());
126 } else {
127 fm.format(" lastAccessTime : null%n");
128 }
129 fm.format(" lastModifiedTime: %tc%n", lastModifiedTime().toMillis());
130 fm.format(" isRegularFile : %b%n", isRegularFile());
131 fm.format(" isDirectory : %b%n", isDirectory());
132 fm.format(" isSymbolicLink : %b%n", isSymbolicLink());
133 fm.format(" isOther : %b%n", isOther());
134 fm.format(" fileKey : %s%n", fileKey());
135 fm.format(" size : %d%n", size());
136 fm.format(" compressedSize : %d%n", compressedSize());
137 fm.format(" extension : %s%n", extension());
138 }
139 return sb.toString();
140 }
141 }