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Java > Open Source Codes > com > caucho > db > sql > DoubleExpr


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.db.sql;
30
31 import com.caucho.log.Log;
32
33 import java.sql.SQLException JavaDoc;
34 import java.util.ArrayList JavaDoc;
35 import java.util.logging.Logger JavaDoc;
36
37 class DoubleExpr extends Expr {
38   private static final Logger JavaDoc log = Log.open(DoubleExpr.class);
39
40   private double _value;
41
42   DoubleExpr(double value)
43   {
44     _value = value;
45   }
46
47   /**
48    * Returns the type of the expression.
49    */
50   public Class JavaDoc getType()
51   {
52     return double.class;
53   }
54
55   /**
56    * Returns the cost based on the given FromList.
57    */
58   public long subCost(ArrayList JavaDoc<FromItem> fromList)
59   {
60     return 0;
61   }
62
63   public int evalInt(QueryContext context)
64     throws SQLException JavaDoc
65   {
66     return (int) _value;
67   }
68
69   public long evalLong(QueryContext context)
70     throws SQLException JavaDoc
71   {
72     return (long) _value;
73   }
74
75   public double evalDouble(QueryContext context)
76     throws SQLException JavaDoc
77   {
78     return _value;
79   }
80
81   public String JavaDoc evalString(QueryContext context)
82     throws SQLException JavaDoc
83   {
84     return String.valueOf(_value);
85   }
86
87   public String JavaDoc toString()
88   {
89     return String.valueOf(_value);
90   }
91 }
92
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