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Java > Open Source Codes > com > db4o > io > DebugIoAdapter


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o.io;
22
23 import java.io.*;
24
25 /**
26  * @exclude
27  */
28 public class DebugIoAdapter extends VanillaIoAdapter{
29     
30     public static int counter;
31     
32     private static final int[] RANGE_OF_INTEREST = new int[] {0, 20};
33     
34
35     public DebugIoAdapter(IoAdapter delegateAdapter){
36         super(delegateAdapter);
37     }
38     
39     protected DebugIoAdapter(IoAdapter delegateAdapter, String JavaDoc path, boolean lockFile, long initialLength) throws IOException {
40         super(delegateAdapter.open(path, lockFile, initialLength));
41     }
42
43     public IoAdapter open(String JavaDoc path, boolean lockFile, long initialLength) throws IOException {
44         return new DebugIoAdapter(new RandomAccessFileAdapter(), path, lockFile, initialLength);
45     }
46     
47     public void seek(long pos) throws IOException {
48         if(pos >= RANGE_OF_INTEREST[0] && pos <= RANGE_OF_INTEREST[1]){
49             counter ++;
50             System.out.println("seek: " + pos + " counter: " + counter);
51         }
52         super.seek(pos);
53     }
54
55 }
56
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