01: /**
02: * com.mckoi.database.ParameterSubstitution 09 Sep 2001
03: *
04: * Mckoi SQL Database ( http://www.mckoi.com/database )
05: * Copyright (C) 2000, 2001, 2002 Diehl and Associates, Inc.
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * Version 2 as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: * GNU General Public License Version 2 for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * Version 2 along with this program; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19: *
20: * Change Log:
21: *
22: *
23: */package com.mckoi.database;
24:
25: /**
26: * An object that represents a constant value that is to be lately binded to
27: * a constant value in an Expression. This is used when we have ? style
28: * prepared statement values. This object is used as a marker in the
29: * elements of a expression.
30: *
31: * @author Tobias Downer
32: */
33:
34: public class ParameterSubstitution implements java.io.Serializable {
35:
36: static final long serialVersionUID = -740886588230246432L;
37:
38: /**
39: * The numerical number of this parameter substitution. The first
40: * substitution is '0', the second is '1', etc.
41: */
42: private int parameter_id;
43:
44: /**
45: * Creates the substitution.
46: */
47: public ParameterSubstitution(int parameter_id) {
48: this .parameter_id = parameter_id;
49: }
50:
51: /**
52: * Returns the number of this parameter id.
53: */
54: public int getID() {
55: return parameter_id;
56: }
57:
58: /**
59: * Equality test.
60: */
61: public boolean equals(Object ob) {
62: ParameterSubstitution sub = (ParameterSubstitution) ob;
63: return this.parameter_id == sub.parameter_id;
64: }
65:
66: }
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