1 /*
2  * Copyright (c) 2007, 2015, 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
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24  */
25 
26 package com.sun.media.sound;
27 
28 import java.io.BufferedReader;
29 import java.io.File;
30 import java.io.IOException;
31 import java.io.InputStream;
32 import java.io.InputStreamReader;
33 import java.net.URL;
34 import java.net.URLClassLoader;
35 import java.util.ArrayList;
36 import java.util.Objects;
37 
38 import javax.sound.midi.InvalidMidiDataException;
39 import javax.sound.midi.Soundbank;
40 import javax.sound.midi.spi.SoundbankReader;
41 
42 import sun.reflect.misc.ReflectUtil;
43 
44 /**
45  * JarSoundbankReader is used to read soundbank object from jar files.
46  *
47  * @author Karl Helgason
48  */
49 public final class JARSoundbankReader extends SoundbankReader {
50 
isZIP(URL url)51     private static boolean isZIP(URL url) {
52         boolean ok = false;
53         try {
54             InputStream stream = url.openStream();
55             try {
56                 byte[] buff = new byte[4];
57                 ok = stream.read(buff) == 4;
58                 if (ok) {
59                     ok =  (buff[0] == 0x50
60                         && buff[1] == 0x4b
61                         && buff[2] == 0x03
62                         && buff[3] == 0x04);
63                 }
64             } finally {
65                 stream.close();
66             }
67         } catch (IOException e) {
68         }
69         return ok;
70     }
71 
72     @Override
73     @SuppressWarnings("deprecation")
getSoundbank(URL url)74     public Soundbank getSoundbank(URL url)
75             throws InvalidMidiDataException, IOException {
76         if (!isZIP(url))
77             return null;
78         ArrayList<Soundbank> soundbanks = new ArrayList<>();
79         URLClassLoader ucl = URLClassLoader.newInstance(new URL[]{url});
80         InputStream stream = ucl.getResourceAsStream(
81                 "META-INF/services/javax.sound.midi.Soundbank");
82         if (stream == null)
83             return null;
84         try
85         {
86             BufferedReader r = new BufferedReader(new InputStreamReader(stream));
87             String line = r.readLine();
88             while (line != null) {
89                 if (!line.startsWith("#")) {
90                     try {
91                         Class<?> c = Class.forName(line.trim(), false, ucl);
92                         if (Soundbank.class.isAssignableFrom(c)) {
93                             ReflectUtil.checkPackageAccess(c);
94                             Object o = c.newInstance();
95                             soundbanks.add((Soundbank) o);
96                         }
97                     } catch (ReflectiveOperationException ignored) {
98                     }
99                 }
100                 line = r.readLine();
101             }
102         }
103         finally
104         {
105             stream.close();
106         }
107         if (soundbanks.size() == 0)
108             return null;
109         if (soundbanks.size() == 1)
110             return soundbanks.get(0);
111         SimpleSoundbank sbk = new SimpleSoundbank();
112         for (Soundbank soundbank : soundbanks)
113             sbk.addAllInstruments(soundbank);
114         return sbk;
115     }
116 
117     @Override
getSoundbank(InputStream stream)118     public Soundbank getSoundbank(InputStream stream)
119             throws InvalidMidiDataException, IOException {
120         Objects.requireNonNull(stream);
121         return null;
122     }
123 
124     @Override
getSoundbank(File file)125     public Soundbank getSoundbank(File file)
126             throws InvalidMidiDataException, IOException {
127         return getSoundbank(file.toURI().toURL());
128     }
129 }
130