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


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 java.sql.SQLException JavaDoc;
32 import java.util.ArrayList JavaDoc;
33
34 class NumberExpr extends Expr {
35   static Expr create(String JavaDoc lexeme)
36     throws SQLException JavaDoc
37   {
38     if (lexeme.indexOf('.') >= 0 ||
39     lexeme.indexOf('e') >= 0 ||
40     lexeme.indexOf('E') >= 0)
41       return new DoubleExpr(Double.parseDouble(lexeme));
42     else {
43       long value = Long.parseLong(lexeme);
44
45       return new LongExpr(value);
46     }
47   }
48
49   private NumberExpr() {}
50
51   /**
52    * Returns the cost based on the given FromList.
53    */
54   public long subCost(ArrayList JavaDoc<FromItem> fromList)
55   {
56     return 0;
57   }
58 }
59
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