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 com.sun.tools.javac.platform;
27
28 import java.io.IOException;
29 import java.nio.file.DirectoryStream;
30 import java.nio.file.FileSystem;
31 import java.nio.file.FileSystems;
32 import java.nio.file.Files;
33 import java.nio.file.Path;
34 import java.nio.file.Paths;
35 import java.nio.file.ProviderNotFoundException;
36 import java.util.ArrayList;
37 import java.util.Collection;
38 import java.util.Collections;
39 import java.util.HashMap;
40 import java.util.List;
41 import java.util.Map;
42 import java.util.Set;
43 import java.util.TreeSet;
44
45 import javax.annotation.processing.Processor;
46
47 import com.sun.source.util.Plugin;
48 import com.sun.tools.javac.jvm.Target;
49
50 /** PlatformProvider for JDK N.
51 *
52 * <p><b>This is NOT part of any supported API.
53 * If you write code that depends on this, you do so at your own risk.
54 * This code and its internal interfaces are subject to change or
55 * deletion without notice.</b>
56 */
57 public class JDKPlatformProvider implements PlatformProvider {
58
59 @Override
60 public Iterable<String> getSupportedPlatformNames() {
61 return SUPPORTED_JAVA_PLATFORM_VERSIONS;
62 }
63
64 @Override
65 public PlatformDescription getPlatform(String platformName, String options) {
66 return new PlatformDescriptionImpl(platformName);
67 }
68
69 private static final String[] symbolFileLocation = { "lib", "ct.sym" };
70
71 private static final Set<String> SUPPORTED_JAVA_PLATFORM_VERSIONS;
72
73 static {
74 SUPPORTED_JAVA_PLATFORM_VERSIONS = new TreeSet<>();
75 Path ctSymFile = findCtSym();
76 if (Files.exists(ctSymFile)) {
77 try (FileSystem fs = FileSystems.newFileSystem(ctSymFile, null);
78 DirectoryStream<Path> dir =
79 Files.newDirectoryStream(fs.getRootDirectories().iterator().next())) {
80 for (Path section : dir) {
81 for (char ver : section.getFileName().toString().toCharArray()) {
82 String verString = Character.toString(ver);
83 Target t = Target.lookup(verString);
84
85 if (t != null) {
86 SUPPORTED_JAVA_PLATFORM_VERSIONS.add(targetNumericVersion(t));
87 }
88 }
89 }
90 } catch (IOException | ProviderNotFoundException ex) {
91 }
92 }
93 SUPPORTED_JAVA_PLATFORM_VERSIONS.add(targetNumericVersion(Target.DEFAULT));
94 }
95
96 private static String targetNumericVersion(Target target) {
97 return Integer.toString(target.ordinal() - Target.JDK1_1.ordinal() + 1);
98 }
99
100 static class PlatformDescriptionImpl implements PlatformDescription {
101
102 private final Map<Path, FileSystem> ctSym2FileSystem = new HashMap<>();
103 private final String version;
104
105 PlatformDescriptionImpl(String version) {
106 this.version = version;
107 }
108
109 @Override
110 public Collection<Path> getPlatformPath() {
111 if (Target.lookup(version) == Target.DEFAULT) {
112 return null;
113 }
114
115 List<Path> paths = new ArrayList<>();
116 Path file = findCtSym();
117 // file == ${jdk.home}/lib/ct.sym
118 if (Files.exists(file)) {
119 FileSystem fs = ctSym2FileSystem.get(file);
120 if (fs == null) {
121 try {
122 ctSym2FileSystem.put(file, fs = FileSystems.newFileSystem(file, null));
123 } catch (IOException ex) {
124 throw new IllegalStateException(ex);
125 }
126 }
127 Path root = fs.getRootDirectories().iterator().next();
128 try (DirectoryStream<Path> dir = Files.newDirectoryStream(root)) {
129 for (Path section : dir) {
130 if (section.getFileName().toString().contains(version)) {
131 paths.add(section);
132 }
133 }
134 } catch (IOException ex) {
135 throw new IllegalStateException(ex);
136 }
137 } else {
138 throw new IllegalStateException("Cannot find ct.sym!");
139 }
140 return paths;
141 }
142
143 @Override
144 public String getSourceVersion() {
145 return version;
146 }
147
148 @Override
149 public String getTargetVersion() {
150 return version;
151 }
152
153 @Override
154 public List<PluginInfo<Processor>> getAnnotationProcessors() {
155 return Collections.emptyList();
156 }
157
158 @Override
159 public List<PluginInfo<Plugin>> getPlugins() {
160 return Collections.emptyList();
161 }
162
163 @Override
164 public List<String> getAdditionalOptions() {
165 return Collections.emptyList();
166 }
167
168 @Override
169 public void close() throws IOException {
170 for (FileSystem fs : ctSym2FileSystem.values()) {
171 fs.close();
172 }
173 ctSym2FileSystem.clear();
174 }
175
176 }
177
178 static Path findCtSym() {
179 String javaHome = System.getProperty("java.home");
180 Path file = Paths.get(javaHome);
181 // file == ${jdk.home}
182 for (String name : symbolFileLocation)
183 file = file.resolve(name);
184 return file;
185 }
186
187 }