1 /*
2  * Copyright 2007 Sun Microsystems, Inc.  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.  Sun designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Sun 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
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22  * CA 95054 USA or visit www.sun.com if you need additional information or
23  * have any questions.
24  */
25 package com.sun.media.sound;
26 
27 import java.io.BufferedReader;
28 import java.io.File;
29 import java.io.IOException;
30 import java.io.InputStream;
31 import java.io.InputStreamReader;
32 import java.net.URL;
33 import java.net.URLClassLoader;
34 import java.util.ArrayList;
35 import javax.sound.midi.InvalidMidiDataException;
36 import javax.sound.midi.Soundbank;
37 import javax.sound.midi.spi.SoundbankReader;
38 
39 /**
40  * JarSoundbankReader is used to read sounbank object from jar files.
41  *
42  * @author Karl Helgason
43  */
44 public class JARSoundbankReader extends SoundbankReader {
45 
isZIP(URL url)46     public boolean isZIP(URL url) {
47         boolean ok = false;
48         try {
49             InputStream stream = url.openStream();
50             try {
51                 byte[] buff = new byte[4];
52                 ok = stream.read(buff) == 4;
53                 if (ok) {
54                     ok =  (buff[0] == 0x50
55                         && buff[1] == 0x4b
56                         && buff[2] == 0x03
57                         && buff[3] == 0x04);
58                 }
59             } finally {
60                 stream.close();
61             }
62         } catch (IOException e) {
63         }
64         return ok;
65     }
66 
getSoundbank(URL url)67     public Soundbank getSoundbank(URL url)
68             throws InvalidMidiDataException, IOException {
69         if (!isZIP(url))
70             return null;
71         ArrayList<Soundbank> soundbanks = new ArrayList<Soundbank>();
72         URLClassLoader ucl = URLClassLoader.newInstance(new URL[]{url});
73         InputStream stream = ucl.getResourceAsStream(
74                 "META-INF/services/javax.sound.midi.Soundbank");
75         if (stream == null)
76             return null;
77         try
78         {
79             BufferedReader r = new BufferedReader(new InputStreamReader(stream));
80             String line = r.readLine();
81             while (line != null) {
82                 if (!line.startsWith("#")) {
83                     try {
84                         Class c = Class.forName(line.trim(), true, ucl);
85                         Object o = c.newInstance();
86                         if (o instanceof Soundbank) {
87                             soundbanks.add((Soundbank) o);
88                         }
89                     } catch (ClassNotFoundException  e) {
90                     } catch (InstantiationException  e) {
91                     } catch (IllegalAccessException  e) {
92                     }
93                 }
94                 line = r.readLine();
95             }
96         }
97         finally
98         {
99             stream.close();
100         }
101         if (soundbanks.size() == 0)
102             return null;
103         if (soundbanks.size() == 1)
104             return soundbanks.get(0);
105         SimpleSoundbank sbk = new SimpleSoundbank();
106         for (Soundbank soundbank : soundbanks)
107             sbk.addAllInstruments(soundbank);
108         return sbk;
109     }
110 
getSoundbank(InputStream stream)111     public Soundbank getSoundbank(InputStream stream)
112             throws InvalidMidiDataException, IOException {
113         return null;
114     }
115 
getSoundbank(File file)116     public Soundbank getSoundbank(File file)
117             throws InvalidMidiDataException, IOException {
118         return getSoundbank(file.toURI().toURL());
119     }
120 }
121