1 /* 2 * Copyright (c) 2017, 2018, 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 26 package jdk.tools.jaotc.collect.module; 27 28 import jdk.tools.jaotc.collect.ClassSource; 29 import jdk.tools.jaotc.collect.FileSupport; 30 import jdk.tools.jaotc.collect.SearchPath; 31 import jdk.tools.jaotc.collect.SourceProvider; 32 33 import java.io.IOException; 34 import java.net.URI; 35 import java.nio.file.FileSystem; 36 import java.nio.file.FileSystems; 37 import java.nio.file.Path; 38 39 public final class ModuleSourceProvider implements SourceProvider { 40 private final FileSystem fileSystem; 41 private final ClassLoader classLoader; 42 private final FileSupport fileSupport; 43 public static final String TYPE = "module"; 44 45 public ModuleSourceProvider() { 46 this(FileSystems.getFileSystem(URI.create("jrt:/")), ClassLoader.getSystemClassLoader(), new FileSupport()); 47 } 48 49 public ModuleSourceProvider(FileSystem fileSystem, ClassLoader classLoader, FileSupport fileSupport) { 50 this.fileSystem = fileSystem; 51 this.classLoader = classLoader; 52 this.fileSupport = fileSupport; 53 } 54 55 @Override 56 public ClassSource findSource(String name, SearchPath searchPath) { 57 Path path = fileSystem.getPath(name); 58 Path dir = fileSystem.getPath("modules"); 59 60 if (dir == null || !fileSupport.isDirectory(dir)) { 61 return null; 62 } 63 64 Path found = findModuleDirectory(dir, path); 65 66 if (found == null) { 67 return null; 68 } 69 70 return new ModuleSource(found, classLoader); 71 } 72 73 private Path findModuleDirectory(Path root, Path path) { 74 try { 75 return fileSupport.getSubDirectory(fileSystem, root, path); 76 } catch (IOException e) { 77 throw new InternalError(e); 78 } 79 } 80 81 @Override 82 public boolean supports(String type) { 83 return TYPE.equals(type); 84 } 85 }