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