1 /*
   2  * Copyright (c) 2017, 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 package jdk.tools.jaotc.collect.module;
  25 
  26 import jdk.tools.jaotc.collect.ClassSource;
  27 import jdk.tools.jaotc.collect.FileSupport;
  28 import jdk.tools.jaotc.collect.SearchPath;
  29 import jdk.tools.jaotc.collect.SourceProvider;
  30 
  31 import java.io.IOException;
  32 import java.net.URI;
  33 import java.nio.file.FileSystem;
  34 import java.nio.file.FileSystems;
  35 import java.nio.file.Path;
  36 
  37 public final class ModuleSourceProvider implements SourceProvider {
  38     private final FileSystem fileSystem;
  39     private final ClassLoader classLoader;
  40     private final FileSupport fileSupport;
  41     public final static String TYPE = "module";
  42 
  43     public ModuleSourceProvider() {
  44         this(FileSystems.getFileSystem(URI.create("jrt:/")), ClassLoader.getSystemClassLoader(), new FileSupport());
  45     }
  46 
  47     public ModuleSourceProvider(FileSystem fileSystem, ClassLoader classLoader, FileSupport fileSupport) {
  48         this.fileSystem = fileSystem;
  49         this.classLoader = classLoader;
  50         this.fileSupport = fileSupport;
  51     }
  52 
  53     @Override
  54     public ClassSource findSource(String name, SearchPath searchPath) {
  55         Path path = fileSystem.getPath(name);
  56         Path dir = fileSystem.getPath("modules");
  57 
  58         if (dir == null || !fileSupport.isDirectory(dir)) {
  59             return null;
  60         }
  61 
  62         Path found = findModuleDirectory(dir, path);
  63 
  64         if (found == null) {
  65             return null;
  66         }
  67 
  68         return new ModuleSource(found, classLoader);
  69     }
  70 
  71     private Path findModuleDirectory(Path root, Path path) {
  72         try {
  73             return fileSupport.getSubDirectory(fileSystem, root, path);
  74         } catch (IOException e) {
  75             throw new InternalError(e);
  76         }
  77     }
  78 
  79     @Override
  80     public boolean supports(String type) {
  81         return TYPE.equals(type);
  82     }
  83 }