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Java > Open Source Codes > com > mckoi > database > ParameterSubstitution


1 /**
2  * com.mckoi.database.ParameterSubstitution 09 Sep 2001
3  *
4  * Mckoi SQL Database ( http://www.mckoi.com/database )
5  * Copyright (C) 2000, 2001, 2002 Diehl and Associates, Inc.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * 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  */
24
25 package com.mckoi.database;
26
27 /**
28  * An object that represents a constant value that is to be lately binded to
29  * a constant value in an Expression. This is used when we have ? style
30  * prepared statement values. This object is used as a marker in the
31  * elements of a expression.
32  *
33  * @author Tobias Downer
34  */
35
36 public class ParameterSubstitution implements java.io.Serializable JavaDoc {
37
38   static final long serialVersionUID = -740886588230246432L;
39
40   /**
41    * The numerical number of this parameter substitution. The first
42    * substitution is '0', the second is '1', etc.
43    */
44   private int parameter_id;
45
46   /**
47    * Creates the substitution.
48    */
49   public ParameterSubstitution(int parameter_id) {
50     this.parameter_id = parameter_id;
51   }
52
53   /**
54    * Returns the number of this parameter id.
55    */
56   public int getID() {
57     return parameter_id;
58   }
59
60   /**
61    * Equality test.
62    */
63   public boolean equals(Object JavaDoc ob) {
64     ParameterSubstitution sub = (ParameterSubstitution) ob;
65     return this.parameter_id == sub.parameter_id;
66   }
67
68 }
69
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