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 }