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.jar;
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.net.MalformedURLException;
34 import java.nio.file.FileSystem;
35 import java.nio.file.FileSystems;
36 import java.nio.file.Path;
37 import java.nio.file.ProviderNotFoundException;
38 
39 public final class JarSourceProvider implements SourceProvider {
40     private final FileSystem fileSystem;
41     private final FileSupport fileSupport;
42     public static final String TYPE = "jar";
43 
JarSourceProvider()44     public JarSourceProvider() {
45         this(new FileSupport());
46     }
47 
JarSourceProvider(FileSupport fileSupport)48     public JarSourceProvider(FileSupport fileSupport) {
49         this.fileSupport = fileSupport;
50         fileSystem = FileSystems.getDefault();
51     }
52 
53     @Override
findSource(String name, SearchPath searchPath)54     public ClassSource findSource(String name, SearchPath searchPath) {
55         Path fileName = fileSystem.getPath(name);
56         Path jarFile = searchPath.find(fileSystem, fileName);
57 
58         if (!validPath(jarFile)) {
59             return null;
60         }
61 
62         return createSource(jarFile);
63     }
64 
createSource(Path jarFile)65     private ClassSource createSource(Path jarFile) {
66         try {
67             Path jarRootPath = fileSupport.getJarFileSystemRoot(jarFile);
68             if (jarRootPath == null) {
69                 return null;
70             }
71             ClassLoader classLoader = fileSupport.createClassLoader(jarFile);
72             return new JarFileSource(jarFile, jarRootPath, classLoader);
73         } catch (ProviderNotFoundException | MalformedURLException e) {
74         }
75         return null;
76     }
77 
78     @Override
supports(String type)79     public boolean supports(String type) {
80         return TYPE.equals(type);
81     }
82 
validPath(Path jarFile)83     private boolean validPath(Path jarFile) {
84         return jarFile != null && !fileSupport.isDirectory(jarFile);
85     }
86 }
87