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author | Björn Stenberg <bjorn@haxx.se> | 2007-01-08 23:53:00 +0000 |
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committer | Björn Stenberg <bjorn@haxx.se> | 2007-01-08 23:53:00 +0000 |
commit | 7039a05147b8bbfc829babea1c65bd436450b505 (patch) | |
tree | 4ba555eb84ed97b72b0575034d5b0530a393713e /songdbj/javazoom/jl/decoder/JavaLayerUtils.java | |
parent | 6d4c19707ef95942e323cbdc89fbbfdbe45e7cc5 (diff) | |
download | rockbox-7039a05147b8bbfc829babea1c65bd436450b505.tar.gz rockbox-7039a05147b8bbfc829babea1c65bd436450b505.zip |
Splitting out songdbj
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11953 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'songdbj/javazoom/jl/decoder/JavaLayerUtils.java')
-rw-r--r-- | songdbj/javazoom/jl/decoder/JavaLayerUtils.java | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/songdbj/javazoom/jl/decoder/JavaLayerUtils.java b/songdbj/javazoom/jl/decoder/JavaLayerUtils.java deleted file mode 100644 index c9ce3838e5..0000000000 --- a/songdbj/javazoom/jl/decoder/JavaLayerUtils.java +++ /dev/null | |||
@@ -1,207 +0,0 @@ | |||
1 | /* | ||
2 | * 11/19/04 1.0 moved to LGPL. | ||
3 | * 12/12/99 Initial version. mdm@techie.com | ||
4 | *----------------------------------------------------------------------- | ||
5 | * This program is free software; you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU Library General Public License as published | ||
7 | * by the Free Software Foundation; either version 2 of the License, or | ||
8 | * (at your option) any later version. | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | * GNU Library General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU Library General Public | ||
16 | * License along with this program; if not, write to the Free Software | ||
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
18 | *---------------------------------------------------------------------- | ||
19 | */ | ||
20 | |||
21 | package javazoom.jl.decoder; | ||
22 | |||
23 | import java.io.IOException; | ||
24 | import java.io.InputStream; | ||
25 | import java.io.InvalidClassException; | ||
26 | import java.io.InvalidObjectException; | ||
27 | import java.io.ObjectInputStream; | ||
28 | import java.io.ObjectOutputStream; | ||
29 | import java.io.OutputStream; | ||
30 | import java.lang.reflect.Array; | ||
31 | |||
32 | /** | ||
33 | * The JavaLayerUtils class is not strictly part of the JavaLayer API. | ||
34 | * It serves to provide useful methods and system-wide hooks. | ||
35 | * | ||
36 | * @author MDM | ||
37 | */ | ||
38 | public class JavaLayerUtils | ||
39 | { | ||
40 | static private JavaLayerHook hook = null; | ||
41 | |||
42 | /** | ||
43 | * Deserializes the object contained in the given input stream. | ||
44 | * @param in The input stream to deserialize an object from. | ||
45 | * @param cls The expected class of the deserialized object. | ||
46 | */ | ||
47 | static public Object deserialize(InputStream in, Class cls) | ||
48 | throws IOException | ||
49 | { | ||
50 | if (cls==null) | ||
51 | throw new NullPointerException("cls"); | ||
52 | |||
53 | Object obj = deserialize(in, cls); | ||
54 | if (!cls.isInstance(obj)) | ||
55 | { | ||
56 | throw new InvalidObjectException("type of deserialized instance not of required class."); | ||
57 | } | ||
58 | |||
59 | return obj; | ||
60 | } | ||
61 | |||
62 | /** | ||
63 | * Deserializes an object from the given <code>InputStream</code>. | ||
64 | * The deserialization is delegated to an <code> | ||
65 | * ObjectInputStream</code> instance. | ||
66 | * | ||
67 | * @param in The <code>InputStream</code> to deserialize an object | ||
68 | * from. | ||
69 | * | ||
70 | * @return The object deserialized from the stream. | ||
71 | * @exception IOException is thrown if there was a problem reading | ||
72 | * the underlying stream, or an object could not be deserialized | ||
73 | * from the stream. | ||
74 | * | ||
75 | * @see java.io.ObjectInputStream | ||
76 | */ | ||
77 | static public Object deserialize(InputStream in) | ||
78 | throws IOException | ||
79 | { | ||
80 | if (in==null) | ||
81 | throw new NullPointerException("in"); | ||
82 | |||
83 | ObjectInputStream objIn = new ObjectInputStream(in); | ||
84 | |||
85 | Object obj; | ||
86 | |||
87 | try | ||
88 | { | ||
89 | obj = objIn.readObject(); | ||
90 | } | ||
91 | catch (ClassNotFoundException ex) | ||
92 | { | ||
93 | throw new InvalidClassException(ex.toString()); | ||
94 | } | ||
95 | |||
96 | return obj; | ||
97 | } | ||
98 | |||
99 | /** | ||
100 | * Deserializes an array from a given <code>InputStream</code>. | ||
101 | * | ||
102 | * @param in The <code>InputStream</code> to | ||
103 | * deserialize an object from. | ||
104 | * | ||
105 | * @param elemType The class denoting the type of the array | ||
106 | * elements. | ||
107 | * @param length The expected length of the array, or -1 if | ||
108 | * any length is expected. | ||
109 | */ | ||
110 | static public Object deserializeArray(InputStream in, Class elemType, int length) | ||
111 | throws IOException | ||
112 | { | ||
113 | if (elemType==null) | ||
114 | throw new NullPointerException("elemType"); | ||
115 | |||
116 | if (length<-1) | ||
117 | throw new IllegalArgumentException("length"); | ||
118 | |||
119 | Object obj = deserialize(in); | ||
120 | |||
121 | Class cls = obj.getClass(); | ||
122 | |||
123 | |||
124 | if (!cls.isArray()) | ||
125 | throw new InvalidObjectException("object is not an array"); | ||
126 | |||
127 | Class arrayElemType = cls.getComponentType(); | ||
128 | if (arrayElemType!=elemType) | ||
129 | throw new InvalidObjectException("unexpected array component type"); | ||
130 | |||
131 | if (length != -1) | ||
132 | { | ||
133 | int arrayLength = Array.getLength(obj); | ||
134 | if (arrayLength!=length) | ||
135 | throw new InvalidObjectException("array length mismatch"); | ||
136 | } | ||
137 | |||
138 | return obj; | ||
139 | } | ||
140 | |||
141 | static public Object deserializeArrayResource(String name, Class elemType, int length) | ||
142 | throws IOException | ||
143 | { | ||
144 | InputStream str = getResourceAsStream(name); | ||
145 | if (str==null) | ||
146 | throw new IOException("unable to load resource '"+name+"'"); | ||
147 | |||
148 | Object obj = deserializeArray(str, elemType, length); | ||
149 | |||
150 | return obj; | ||
151 | } | ||
152 | |||
153 | static public void serialize(OutputStream out, Object obj) | ||
154 | throws IOException | ||
155 | { | ||
156 | if (out==null) | ||
157 | throw new NullPointerException("out"); | ||
158 | |||
159 | if (obj==null) | ||
160 | throw new NullPointerException("obj"); | ||
161 | |||
162 | ObjectOutputStream objOut = new ObjectOutputStream(out); | ||
163 | objOut.writeObject(obj); | ||
164 | |||
165 | } | ||
166 | |||
167 | /** | ||
168 | * Sets the system-wide JavaLayer hook. | ||
169 | */ | ||
170 | static synchronized public void setHook(JavaLayerHook hook0) | ||
171 | { | ||
172 | hook = hook0; | ||
173 | } | ||
174 | |||
175 | static synchronized public JavaLayerHook getHook() | ||
176 | { | ||
177 | return hook; | ||
178 | } | ||
179 | |||
180 | /** | ||
181 | * Retrieves an InputStream for a named resource. | ||
182 | * | ||
183 | * @param name The name of the resource. This must be a simple | ||
184 | * name, and not a qualified package name. | ||
185 | * | ||
186 | * @return The InputStream for the named resource, or null if | ||
187 | * the resource has not been found. If a hook has been | ||
188 | * provided, its getResourceAsStream() method is called | ||
189 | * to retrieve the resource. | ||
190 | */ | ||
191 | static synchronized public InputStream getResourceAsStream(String name) | ||
192 | { | ||
193 | InputStream is = null; | ||
194 | |||
195 | if (hook!=null) | ||
196 | { | ||
197 | is = hook.getResourceAsStream(name); | ||
198 | } | ||
199 | else | ||
200 | { | ||
201 | Class cls = JavaLayerUtils.class; | ||
202 | is = cls.getResourceAsStream(name); | ||
203 | } | ||
204 | |||
205 | return is; | ||
206 | } | ||
207 | } | ||