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.nativequery.expr.cmp;
22:
23: // TODO: switch to individual classes and visitor dispatch?
24: public final class ComparisonOperator {
25: public final static int EQUALS_ID = 0;
26: public final static int SMALLER_ID = 1;
27: public final static int GREATER_ID = 2;
28: public final static int CONTAINS_ID = 3;
29: public final static int STARTSWITH_ID = 4;
30: public final static int ENDSWITH_ID = 5;
31: public final static int IDENTITY_ID = 6;
32:
33: public final static ComparisonOperator EQUALS = new ComparisonOperator(
34: EQUALS_ID, "==", true);
35: public final static ComparisonOperator SMALLER = new ComparisonOperator(
36: SMALLER_ID, "<", false);
37: public final static ComparisonOperator GREATER = new ComparisonOperator(
38: GREATER_ID, ">", false);
39: public final static ComparisonOperator CONTAINS = new ComparisonOperator(
40: CONTAINS_ID, "<CONTAINS>", false);
41: public final static ComparisonOperator STARTSWITH = new ComparisonOperator(
42: STARTSWITH_ID, "<STARTSWITH>", false);
43: public final static ComparisonOperator ENDSWITH = new ComparisonOperator(
44: ENDSWITH_ID, "<ENDSWITH>", false);
45: public final static ComparisonOperator IDENTITY = new ComparisonOperator(
46: IDENTITY_ID, "===", true);
47:
48: private int _id;
49: private String _op;
50: private boolean _symmetric;
51:
52: private ComparisonOperator(int id, String op, boolean symmetric) {
53: _id = id;
54: _op = op;
55: _symmetric = symmetric;
56: }
57:
58: public int id() {
59: return _id;
60: }
61:
62: public String toString() {
63: return _op;
64: }
65:
66: public boolean isSymmetric() {
67: return _symmetric;
68: }
69: }
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