1 /* 2 * Copyright (c) 2012, 2019, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.debug; 26 27 import java.io.File; 28 import java.io.IOException; 29 import java.nio.file.Files; 30 import java.nio.file.Path; 31 import java.util.Collections; 32 import java.util.HashMap; 33 import java.util.Map; 34 35 import jdk.vm.ci.services.Services; 36 37 /** Avoid using directly. Only public for the needs of unit testing. */ 38 public final class Versions { 39 static final Versions VERSIONS; 40 static { 41 String home = Services.getSavedProperties().get("java.home"); 42 VERSIONS = new Versions(home == null ? null : new File(home).toPath()); 43 } 44 45 private final Map<Object, Object> versions; 46 47 public Versions(Path home) { 48 Map<Object, Object> map = new HashMap<>(); 49 ASSIGN: try { 50 Path info = findReleaseInfo(home); 51 if (info == null) { 52 break ASSIGN; 53 } 54 for (String line : Files.readAllLines(info)) { 55 final String prefix = "SOURCE="; 56 if (line.startsWith(prefix)) { 57 for (String versionInfo : line.substring(prefix.length()).replace('"', ' ').split(" ")) { 58 String[] idVersion = versionInfo.split(":"); 59 if (idVersion != null && idVersion.length == 2) { 60 map.put("version." + idVersion[0], idVersion[1]); 61 } 62 } 63 break ASSIGN; 64 } 65 } 66 } catch (IOException ex) { 67 // no versions file found 68 } 69 versions = Collections.unmodifiableMap(map); 70 } 71 72 public Map<Object, Object> withVersions(Map<Object, Object> properties) { 73 if (properties == null) { 74 return versions; 75 } else { 76 properties.putAll(versions); 77 return properties; 78 } 79 } 80 81 private static Path findReleaseInfo(Path jreDir) { 82 if (jreDir == null) { 83 return null; 84 } 85 Path releaseInJre = jreDir.resolve("release"); 86 if (Files.exists(releaseInJre)) { 87 return releaseInJre; 88 } 89 Path jdkDir = jreDir.getParent(); 90 if (jdkDir == null) { 91 return null; 92 } 93 Path releaseInJdk = jdkDir.resolve("release"); 94 return Files.exists(releaseInJdk) ? releaseInJdk : null; 95 } 96 97 }