01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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.internal.btree;
22:
23: import com.db4o.foundation.Iterator4;
24:
25: public interface BTreeRange {
26:
27: /**
28: * Iterates through all the valid pointers in
29: * this range.
30: * @return an Iterator4 over BTreePointer value
31: */
32: public Iterator4 pointers();
33:
34: public Iterator4 keys();
35:
36: public int size();
37:
38: public BTreeRange greater();
39:
40: public BTreeRange union(BTreeRange other);
41:
42: public BTreeRange extendToLast();
43:
44: public BTreeRange smaller();
45:
46: public BTreeRange extendToFirst();
47:
48: public BTreeRange intersect(BTreeRange range);
49:
50: public BTreeRange extendToLastOf(BTreeRange upperRange);
51:
52: public boolean isEmpty();
53:
54: public void accept(BTreeRangeVisitor visitor);
55:
56: public BTreePointer lastPointer();
57: }
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