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 package com.sun.tools.javac.platform;
26
27 import java.io.IOException;
28 import java.nio.file.DirectoryStream;
29 import java.nio.file.FileSystem;
30 import java.nio.file.FileSystems;
31 import java.nio.file.Files;
32 import java.nio.file.Path;
33 import java.nio.file.Paths;
34 import java.util.ArrayList;
35 import java.util.Collection;
36 import java.util.Collections;
37 import java.util.HashMap;
38 import java.util.List;
39 import java.util.Map;
40 import java.util.Set;
41 import java.util.TreeSet;
42 import java.util.stream.Collectors;
43
44 import javax.annotation.processing.Processor;
45
46 import com.sun.source.util.Plugin;
47 import com.sun.tools.javac.jvm.Target;
48
49 /** PlatformProvider for JDK N.
50 *
51 * <p><b>This is NOT part of any supported API.
52 * If you write code that depends on this, you do so at your own risk.
53 * This code and its internal interfaces are subject to change or
54 * deletion without notice.</b>
55 */
56 public class JDKPlatformProvider implements PlatformProviderFactory {
57
58 @Override
59 public Iterable<PlatformProvider> createPlatformProviders() {
60 return SUPPORTED_JAVA_PLATFORM_VERSIONS.stream()
61 .map(version -> new PlatformProviderImpl(version))
62 .collect(Collectors.toList());
63 }
64
65 private static final String[] symbolFileLocation = { "lib", "ct.sym" };
66
67 private static final Set<String> SUPPORTED_JAVA_PLATFORM_VERSIONS;
68
69 static {
70 SUPPORTED_JAVA_PLATFORM_VERSIONS = new TreeSet<>();
71 Path ctSymFile = findCtSym();
72 if (Files.exists(ctSymFile)) {
73 try (FileSystem fs = FileSystems.newFileSystem(ctSymFile, null);
74 DirectoryStream<Path> dir =
75 Files.newDirectoryStream(fs.getRootDirectories().iterator().next())) {
76 for (Path section : dir) {
77 for (char ver : section.getFileName().toString().toCharArray()) {
78 String verString = Character.toString(ver);
79 Target t = Target.lookup(verString);
80
81 if (t != null) {
82 SUPPORTED_JAVA_PLATFORM_VERSIONS.add(targetNumericVersion(t));
83 }
84 }
85 }
86 } catch (IOException ex) {
87 //XXX: can handle somehow? Print a warning?
88 }
89 }
90 SUPPORTED_JAVA_PLATFORM_VERSIONS.add(targetNumericVersion(Target.DEFAULT));
91 }
92
93 private static String targetNumericVersion(Target target) {
94 return Integer.toString(target.ordinal() - Target.JDK1_1.ordinal() + 1);
95 }
96
97 static class PlatformProviderImpl implements PlatformProvider {
98
99 private final Map<Path, FileSystem> ctSym2FileSystem = new HashMap<>();
100 private final String version;
101
102 PlatformProviderImpl(String version) {
103 this.version = version;
104 }
105
106 @Override
107 public String getName() {
108 return version;
109 }
110
111 @Override
112 public Collection<Path> getPlatformPath() {
113 if (Target.lookup(version) == Target.DEFAULT) {
114 return null;
115 }
116
117 List<Path> paths = new ArrayList<>();
118 Path file = findCtSym();
119 // file == ${jdk.home}/lib/ct.sym
120 if (Files.exists(file)) {
121 FileSystem fs = ctSym2FileSystem.get(file);
122 if (fs == null) {
123 try {
124 ctSym2FileSystem.put(file, fs = FileSystems.newFileSystem(file, null));
125 } catch (IOException ex) {
126 throw new IllegalStateException(ex);
127 }
128 }
129 Path root = fs.getRootDirectories().iterator().next();
130 try (DirectoryStream<Path> dir = Files.newDirectoryStream(root)) {
131 for (Path section : dir) {
132 if (section.getFileName().toString().contains(version)) {
133 paths.add(section);
134 }
135 }
136 } catch (IOException ex) {
137 throw new IllegalStateException(ex);
138 }
139 } else {
140 throw new IllegalStateException("Cannot find ct.sym!");
141 }
142 return paths;
143 }
144
145 @Override
146 public String getSourceVersion() {
147 return version;
148 }
149
150 @Override
151 public String getTargetVersion() {
152 return version;
153 }
154
155 @Override
156 public List<PluginInfo<Processor>> getAnnotationProcessors() {
157 return Collections.emptyList();
158 }
159
160 @Override
161 public List<PluginInfo<Plugin>> getPlugins() {
162 return Collections.emptyList();
163 }
164
165 @Override
166 public List<String> getAdditionalOptions() {
167 return Collections.emptyList();
168 }
169
170 @Override
171 public void close() throws IOException {
172 for (FileSystem fs : ctSym2FileSystem.values()) {
173 fs.close();
174 }
175 ctSym2FileSystem.clear();
176 }
177
178 }
179
180 static Path findCtSym() {
181 String javaHome = System.getProperty("java.home");
182 Path file = Paths.get(javaHome);
183 if (file.getFileName().equals(Paths.get("jre")))
184 file = file.getParent();
185 // file == ${jdk.home}
186 for (String name : symbolFileLocation)
187 file = file.resolve(name);
188 return file;
189 }
190
191 }