1/*
2 * Copyright (c) 2009-2010 jMonkeyEngine
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 *   notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above copyright
13 *   notice, this list of conditions and the following disclaimer in the
14 *   documentation and/or other materials provided with the distribution.
15 *
16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
17 *   may be used to endorse or promote products derived from this software
18 *   without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package com.jme3.asset.plugins;
34
35import com.jme3.asset.*;
36import java.io.File;
37import java.io.IOException;
38import java.io.InputStream;
39import java.util.logging.Logger;
40import java.util.zip.ZipEntry;
41import java.util.zip.ZipFile;
42
43/**
44 * <code>ZipLocator</code> is a locator that looks up resources in a .ZIP file.
45 * @author Kirill Vainer
46 */
47public class ZipLocator implements AssetLocator {
48
49    private ZipFile zipfile;
50    private static final Logger logger = Logger.getLogger(ZipLocator.class.getName());
51
52    private class JarAssetInfo extends AssetInfo {
53
54        private final ZipEntry entry;
55
56        public JarAssetInfo(AssetManager manager, AssetKey key, ZipEntry entry){
57            super(manager, key);
58            this.entry = entry;
59        }
60
61        public InputStream openStream(){
62            try{
63                return zipfile.getInputStream(entry);
64            }catch (IOException ex){
65                throw new AssetLoadException("Failed to load zip entry: "+entry, ex);
66            }
67        }
68    }
69
70    public void setRootPath(String rootPath) {
71        try{
72            zipfile = new ZipFile(new File(rootPath), ZipFile.OPEN_READ);
73        }catch (IOException ex){
74            throw new AssetLoadException("Failed to open zip file: " + rootPath, ex);
75        }
76    }
77
78    public AssetInfo locate(AssetManager manager, AssetKey key) {
79        String name = key.getName();
80        ZipEntry entry = zipfile.getEntry(name);
81        if (entry == null)
82            return null;
83
84        return new JarAssetInfo(manager, key, entry);
85    }
86
87}
88