| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.lang.module.ModuleReader; |
| import java.lang.module.ModuleReference; |
| import java.net.URI; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| import jdk.internal.module.ModuleInfo; |
| import jdk.internal.module.ModuleInfo.Attributes; |
| |
| public class ModuleTargetHelper { |
| private ModuleTargetHelper() {} |
| |
| public static final class ModuleTarget { |
| private String targetPlatform; |
| |
| public ModuleTarget(String targetPlatform) { |
| this.targetPlatform = targetPlatform; |
| } |
| |
| public String targetPlatform() { |
| return targetPlatform; |
| } |
| } |
| |
| public static ModuleTarget getJavaBaseTarget() throws IOException { |
| Path p = Paths.get(URI.create("jrt:/modules/java.base/module-info.class")); |
| try (InputStream in = Files.newInputStream(p)) { |
| return read(in); |
| } |
| } |
| |
| public static ModuleTarget read(InputStream in) throws IOException { |
| ModuleInfo.Attributes attrs = ModuleInfo.read(in, null); |
| if (attrs.target() != null) { |
| return new ModuleTarget(attrs.target().targetPlatform()); |
| } else { |
| return null; |
| } |
| } |
| |
| public static ModuleTarget read(ModuleReference modRef) throws IOException { |
| ModuleReader reader = modRef.open(); |
| try (InputStream in = reader.open("module-info.class").get()) { |
| return read(in); |
| } finally { |
| reader.close(); |
| } |
| } |
| } |