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Java > Open Source Codes > net > sf > retrotranslator > transformer > FileContainer


1 /***
2  * Retrotranslator: a Java bytecode transformer that translates Java classes
3  * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
4  *
5  * Copyright (c) 2005 - 2007 Taras Puchko
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the copyright holders nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 package net.sf.retrotranslator.transformer;
33
34 import java.io.*;
35 import java.util.Collection JavaDoc;
36
37 /**
38  * @author Taras Puchko
39  */
40 abstract class FileContainer {
41
42     protected File location;
43
44     protected FileContainer(File location) {
45         this.location = location;
46     }
47
48     public File getLocation() {
49         return location;
50     }
51
52     public abstract Collection JavaDoc<? extends FileEntry> getEntries();
53
54     public abstract void removeEntry(String JavaDoc name);
55
56     public abstract void putEntry(String JavaDoc name, byte[] contents);
57
58     public abstract void flush(SystemLogger logger);
59
60     protected static byte[] readFully(InputStream stream, int length) throws IOException {
61         if (length <= 0) length = 0x8000;
62         byte[] buffer = new byte[length];
63         ByteArrayOutputStream outputStream = new ByteArrayOutputStream(length);
64         int count;
65         while((count = stream.read(buffer)) > 0) {
66             outputStream.write(buffer, 0, count);
67         }
68         return outputStream.toByteArray();
69     }
70
71     public String JavaDoc toString() {
72         return location.toString();
73     }
74
75     public int getFileCount() {
76         return getEntries().size();
77     }
78
79 }
80
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