1 /*
2 * Copyright (c) 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.tools.jlink.internal;
27
28 import jdk.internal.jimage.ImageLocation;
29 import jdk.internal.jimage.ImageStream;
30 import jdk.internal.jimage.ImageStringsReader;
31
32 public final class ImageLocationWriter extends ImageLocation {
33 private int locationOffset;
34
35 private ImageLocationWriter(ImageStringsWriter strings) {
36 super(new long[ATTRIBUTE_COUNT], strings);
37 }
38
39 void writeTo(ImageStream stream) {
40 byte[] bytes = ImageLocation.compress(attributes);
41 locationOffset = stream.getPosition();
42 stream.put(bytes, 0, bytes.length);
43 }
44
45 private ImageLocationWriter addAttribute(int kind, long value) {
46 assert ATTRIBUTE_END < kind &&
47 kind < ATTRIBUTE_COUNT : "Invalid attribute kind";
48 attributes[kind] = value;
49 return this;
50 }
51
52 private ImageLocationWriter addAttribute(int kind, String value) {
53 return addAttribute(kind, strings.add(value));
54 }
55
56 static ImageLocationWriter newLocation(String fullName,
57 ImageStringsWriter strings,
58 long contentOffset, long compressedSize, long uncompressedSize) {
59 String moduleName = "";
60 String parentName = "";
61 String baseName;
62 String extensionName = "";
63
64 if (fullName.startsWith("/modules/")) {
65 moduleName = "modules";
66 baseName = fullName.substring("/modules/".length());
67 } else if ( fullName.startsWith("/packages/")) {
68 moduleName = "packages";
69 baseName = fullName.substring("/packages/".length());
70 } else {
71 int offset = fullName.indexOf('/', 1);
72 if (fullName.length() >= 2 && fullName.charAt(0) == '/' && offset != -1) {
73 moduleName = fullName.substring(1, offset);
74 fullName = fullName.substring(offset + 1);
75 }
76
77 offset = fullName.lastIndexOf('/');
78 if (1 < offset) {
79 parentName = fullName.substring(0, offset);
80 fullName = fullName.substring(offset + 1);
81 }
82
83 offset = fullName.lastIndexOf('.');
84 if (offset != -1) {
85 baseName = fullName.substring(0, offset);
86 extensionName = fullName.substring(offset + 1);
87 } else {
88 baseName = fullName;
89 }
90 }
91
92 return new ImageLocationWriter(strings)
93 .addAttribute(ATTRIBUTE_MODULE, moduleName)
94 .addAttribute(ATTRIBUTE_PARENT, parentName)
95 .addAttribute(ATTRIBUTE_BASE, baseName)
96 .addAttribute(ATTRIBUTE_EXTENSION, extensionName)
97 .addAttribute(ATTRIBUTE_OFFSET, contentOffset)
98 .addAttribute(ATTRIBUTE_COMPRESSED, compressedSize)
99 .addAttribute(ATTRIBUTE_UNCOMPRESSED, uncompressedSize);
100 }
101
102 @Override
103 public int hashCode() {
104 return hashCode(ImageStringsReader.HASH_MULTIPLIER);
105 }
106
107 int hashCode(int seed) {
108 int hash = seed;
109
110 if (getModuleOffset() != 0) {
111 hash = ImageStringsReader.unmaskedHashCode("/", hash);
112 hash = ImageStringsReader.unmaskedHashCode(getModule(), hash);
113 hash = ImageStringsReader.unmaskedHashCode("/", hash);
114 }
115
116 if (getParentOffset() != 0) {
117 hash = ImageStringsReader.unmaskedHashCode(getParent(), hash);
118 hash = ImageStringsReader.unmaskedHashCode("/", hash);
119 }
120
121 hash = ImageStringsReader.unmaskedHashCode(getBase(), hash);
122
123 if (getExtensionOffset() != 0) {
124 hash = ImageStringsReader.unmaskedHashCode(".", hash);
125 hash = ImageStringsReader.unmaskedHashCode(getExtension(), hash);
126 }
127
128 return hash & ImageStringsReader.POSITIVE_MASK;
129 }
130
131 @Override
132 public boolean equals(Object obj) {
133 if (this == obj) {
134 return true;
135 }
136
137 if (!(obj instanceof ImageLocationWriter)) {
138 return false;
139 }
140
141 ImageLocationWriter other = (ImageLocationWriter) obj;
142
143 return getModuleOffset() == other.getModuleOffset() &&
144 getParentOffset() == other.getParentOffset() &&
145 getBaseOffset() == other.getBaseOffset() &&
146 getExtensionOffset() == other.getExtensionOffset();
147 }
148
149 int getLocationOffset() {
150 return locationOffset;
151 }
152 }