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Java > Open Source Codes > com > imagero > uio > RandomAccessFileWrapperRO


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 package com.imagero.uio;
33
34 import java.io.EOFException JavaDoc;
35 import java.io.IOException JavaDoc;
36 import java.io.RandomAccessFile JavaDoc;
37
38 /**
39  * wrap RandomAccessFile in RandomAccessRO
40  * Attention - this class is not buffered.
41  * That means if you make extensive use of readInt, readLong, readChar, ...,
42  * then performance will be pretty poor. Use buffered classes instead.
43  * @author Andrei Kouznetsov
44  * Date: 13.11.2003
45  * Time: 12:58:17
46  */
47 public class RandomAccessFileWrapperRO extends AbstractRandomAccessRO {
48     protected RandomAccessFile JavaDoc in;
49
50     protected int _read() throws IOException JavaDoc {
51         int i = in.read();
52         if(i < 0) {
53             throw new EOFException JavaDoc();
54         }
55         return i;
56     }
57
58     public RandomAccessFileWrapperRO(RandomAccessFile JavaDoc in, int byteOrder) throws IOException JavaDoc {
59         this.in = in;
60         _setByteOrder(byteOrder);
61     }
62
63     public int skip(int n) throws IOException JavaDoc {
64         return skipBytes(n);
65     }
66
67 // public final FileDescriptor getFD() throws IOException {
68 // return in.getFD();
69 // }
70
71     public int read() throws IOException JavaDoc {
72         return in.read();
73     }
74
75     public int read(byte b[], int off, int len) throws IOException JavaDoc {
76         return in.read(b, off, len);
77     }
78
79     public int read(byte b[]) throws IOException JavaDoc {
80         return in.read(b);
81     }
82
83     public long getFilePointer() throws IOException JavaDoc {
84         return in.getFilePointer();
85     }
86
87     public void seek(long pos) throws IOException JavaDoc {
88         in.seek(pos);
89     }
90
91     public long length() throws IOException JavaDoc {
92         return in.length();
93     }
94
95     public void close() throws IOException JavaDoc {
96         in.close();
97     }
98 }
99
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