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Java > Open Source Codes > com > imagero > uio > io > RLEInputStream


1 /*
2  * Copyright (c) Andrey Kuznetsov. All Rights Reserved.
3  *
4  * http://uio.imagero.com
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * o Redistributions of source code must retain the above copyright notice,
10  * this list of conditions and the following disclaimer.
11  *
12  * o Redistributions in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
14  * and/or other materials provided with the distribution.
15  *
16  * o Neither the name of imagero Andrei Kouznetsov nor the names of
17  * its contributors may be used to endorse or promote products derived
18  * from 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,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
29  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 package com.imagero.uio.io;
34
35 import java.io.FilterInputStream JavaDoc;
36 import java.io.IOException JavaDoc;
37 import java.io.InputStream JavaDoc;
38
39 /**
40  * @author Andrey Kuznetsov
41  */
42 public abstract class RLEInputStream extends FilterInputStream JavaDoc {
43     boolean finished;
44
45     public RLEInputStream(InputStream JavaDoc in) {
46         super(in);
47     }
48
49     public int available() throws IOException JavaDoc {
50         if (finished) {
51             return 0;
52         }
53         return 1;
54     }
55
56     public void close() throws IOException JavaDoc {
57     }
58
59     public boolean markSupported() {
60         return false;
61     }
62
63     public synchronized void mark(int readlimit) {
64     }
65
66     public synchronized void reset() throws IOException JavaDoc {
67         throw new IOException JavaDoc("mark/reset not supported");
68     }
69
70     public int read(byte b[]) throws IOException JavaDoc {
71         return read(b, 0, b.length);
72     }
73
74     public int read(byte b[], int off, int len) throws IOException JavaDoc {
75         int i = off;
76
77         try {
78             for (; i < off + len; i++) {
79                 int a = read();
80                 if (a == -1) {
81                     i--;
82                     break;
83                 }
84                 b[i] = (byte) a;
85             }
86         }
87         catch (IOException JavaDoc ex) {
88             ex.printStackTrace();
89         }
90         return i - off;
91     }
92
93     public abstract int read() throws IOException JavaDoc;
94
95     public static class EndOfLineException extends IOException JavaDoc {
96         public EndOfLineException() {
97             super("RowEndException");
98         }
99     }
100
101     public static class EndOfBitmapException extends IOException JavaDoc {
102         public EndOfBitmapException() {
103             super("BitmapEndException");
104         }
105     }
106
107     public static class DeltaRecordException extends IOException JavaDoc {
108         public DeltaRecordException(String JavaDoc s) {
109             super(s);
110         }
111     }
112 }
113
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