| /* |
| * Copyright (c) 2016, 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.IOException; |
| import java.net.URI; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.nio.file.FileSystem; |
| import java.nio.file.FileSystems; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.Collections; |
| import java.util.stream.Stream; |
| |
| /** |
| * Basic jrt file system functionality testing |
| * |
| */ |
| public class Main { |
| |
| public static void main(String[] args) throws Exception { |
| String javaHome = args[0]; |
| FileSystem fs = null; |
| boolean isInstalled = false; |
| if (args.length == 2) { |
| fs = createFsByInstalledProvider(); |
| isInstalled = true; |
| } else { |
| fs = createFsWithURLClassloader(javaHome); |
| } |
| |
| Path mods = fs.getPath("/modules"); |
| try (Stream<Path> stream = Files.walk(mods)) { |
| stream.forEach(path -> { |
| path.getFileName(); |
| }); |
| } finally { |
| try { |
| fs.close(); |
| } catch (UnsupportedOperationException e) { |
| if (!isInstalled) { |
| throw new RuntimeException( |
| "UnsupportedOperationException is thrown unexpectedly"); |
| } |
| } |
| } |
| } |
| |
| private static FileSystem createFsWithURLClassloader(String javaHome) throws IOException{ |
| URL url = Paths.get(javaHome, "lib", "jrt-fs.jar").toUri().toURL(); |
| URLClassLoader loader = new URLClassLoader(new URL[] { url }); |
| return FileSystems.newFileSystem(URI.create("jrt:/"), |
| Collections.emptyMap(), |
| loader); |
| } |
| |
| private static FileSystem createFsByInstalledProvider() throws IOException { |
| return FileSystems.getFileSystem(URI.create("jrt:/")); |
| } |
| } |