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Java > Open Source Codes > com > db4o > inside > btree > BTreeRange


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.btree;
22
23 import com.db4o.foundation.Iterator4;
24
25
26 public interface BTreeRange {
27     
28     /**
29      * Iterates through all the valid pointers in
30      * this range.
31      * @return an Iterator4 over BTreePointer value
32      */

33     public Iterator4 pointers();
34     
35     public Iterator4 keys();
36
37     public int size();
38
39     public BTreeRange greater();
40
41     public BTreeRange union(BTreeRange other);
42
43     public BTreeRange extendToLast();
44
45     public BTreeRange smaller();
46
47     public BTreeRange extendToFirst();
48
49     public BTreeRange intersect(BTreeRange range);
50
51     public BTreeRange extendToLastOf(BTreeRange upperRange);
52
53     public boolean isEmpty();
54     
55     public void accept(BTreeRangeVisitor visitor);
56
57     public BTreePointer lastPointer();
58 }
59
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