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 */
23package jdk.tools.jaotc.collect.jar;
24
25import jdk.tools.jaotc.collect.ClassSource;
26import jdk.tools.jaotc.collect.FileSupport;
27import jdk.tools.jaotc.collect.SearchPath;
28import jdk.tools.jaotc.collect.SourceProvider;
29
30import java.net.MalformedURLException;
31import java.nio.file.FileSystem;
32import java.nio.file.FileSystems;
33import java.nio.file.Path;
34import java.nio.file.ProviderNotFoundException;
35
36public class JarSourceProvider implements SourceProvider {
37    private final FileSystem fileSystem;
38    private final FileSupport fileSupport;
39    public final static String TYPE = "jar";
40
41    public JarSourceProvider() {
42        this(new FileSupport());
43    }
44
45    public JarSourceProvider(FileSupport fileSupport) {
46        this.fileSupport = fileSupport;
47        fileSystem = FileSystems.getDefault();
48    }
49
50    @Override
51    public ClassSource findSource(String name, SearchPath searchPath) {
52        Path fileName = fileSystem.getPath(name);
53        Path jarFile = searchPath.find(fileSystem, fileName);
54
55        if (!validPath(jarFile)) {
56            return null;
57        }
58
59        return createSource(jarFile);
60    }
61
62    private ClassSource createSource(Path jarFile) {
63        try {
64            Path jarRootPath = fileSupport.getJarFileSystemRoot(jarFile);
65            if (jarRootPath == null) {
66                return null;
67            }
68            ClassLoader classLoader = fileSupport.createClassLoader(jarFile);
69            return new JarFileSource(jarFile, jarRootPath, classLoader);
70        } catch (ProviderNotFoundException | MalformedURLException e) {
71        }
72        return null;
73    }
74
75    @Override
76    public boolean supports(String type) {
77        return TYPE.equals(type);
78    }
79
80    private boolean validPath(Path jarFile) {
81        return jarFile != null && !fileSupport.isDirectory(jarFile);
82    }
83}
84