1 | package org.farng.mp3.lyrics3; |
2 | |
3 | import org.farng.mp3.AbstractMP3FragmentBody; |
4 | import org.farng.mp3.InvalidTagException; |
5 | import org.farng.mp3.TagOptionSingleton; |
6 | |
7 | import java.io.IOException; |
8 | import java.io.RandomAccessFile; |
9 | |
10 | /** |
11 | * Contains the actual text strings for a Lyrics3v2 field. |
12 | * |
13 | * @author Eric Farng |
14 | * @version $Revision: 1.4 $ |
15 | */ |
16 | public abstract class AbstractLyrics3v2FieldBody extends AbstractMP3FragmentBody { |
17 | |
18 | /** |
19 | * Creates a new AbstractLyrics3v2FieldBody object. |
20 | */ |
21 | public AbstractLyrics3v2FieldBody() { |
22 | super(); |
23 | } |
24 | |
25 | /** |
26 | * Creates a new AbstractLyrics3v2FieldBody object. |
27 | */ |
28 | public AbstractLyrics3v2FieldBody(final AbstractLyrics3v2FieldBody copyObject) { |
29 | super(copyObject); |
30 | } |
31 | |
32 | protected int readHeader(final RandomAccessFile file) throws InvalidTagException, IOException { |
33 | final int size; |
34 | final byte[] buffer = new byte[5]; |
35 | |
36 | // read the 5 character size |
37 | file.read(buffer, 0, 5); |
38 | size = Integer.parseInt(new String(buffer, 0, 5)); |
39 | if ((size == 0) && (TagOptionSingleton.getInstance().isLyrics3KeepEmptyFieldIfRead() == false)) { |
40 | throw new InvalidTagException("Lyircs3v2 Field has size of zero."); |
41 | } |
42 | return size; |
43 | } |
44 | |
45 | protected void writeHeader(final RandomAccessFile file, final int size) throws IOException { |
46 | final String str; |
47 | int offset = 0; |
48 | final byte[] buffer = new byte[5]; |
49 | |
50 | // todo change this to use pad String |
51 | str = Integer.toString(getSize()); |
52 | for (int i = 0; i < (5 - str.length()); i++) { |
53 | buffer[i] = (byte) '0'; |
54 | } |
55 | offset += (5 - str.length()); |
56 | for (int i = 0; i < str.length(); i++) { |
57 | buffer[i + offset] = (byte) str.charAt(i); |
58 | } |
59 | file.write(buffer); |
60 | } |
61 | } |