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Java > Open Source Codes > com > db4o > inside > freespace > FreespaceIxAddress


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.inside.freespace;
22
23 import com.db4o.*;
24 import com.db4o.foundation.*;
25 import com.db4o.inside.ix.*;
26
27
28 class FreespaceIxAddress extends FreespaceIx{
29     
30     FreespaceIxAddress(YapFile file, MetaIndex metaIndex){
31         super(file, metaIndex);
32     }
33
34     void add(int address, int length) {
35         _index._handler.prepareComparison(new Integer JavaDoc(address));
36         _indexTrans.add(length, new Integer JavaDoc(address));
37     }
38
39     int address() {
40         return _visitor._value;
41     }
42
43     int length() {
44         return _visitor._key;
45     }
46
47     void remove(int address, int length) {
48         _index._handler.prepareComparison(new Integer JavaDoc(address));
49         _indexTrans.remove(length, new Integer JavaDoc(address));
50     }
51
52     int freeSize(){
53         final MutableInt mint = new MutableInt();
54         final IntObjectVisitor freespaceVisitor = new IntObjectVisitor(){
55             public void visit(int anInt, Object JavaDoc anObject) {
56                 mint.add(anInt);
57             }
58         };
59         traverse(new Visitor4() {
60             public void visit(Object JavaDoc obj) {
61                 ((IxTree)obj).visitAll(freespaceVisitor);
62             }
63         });
64         return mint.value();
65     }
66 }
67
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