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Java > Open Source Codes > smallsql > database > ExpressionFunctionReturnP1StringAndBinary


1 /* =============================================================
2  * SmallSQL : a free Java DBMS library for the Java(tm) platform
3  * =============================================================
4  *
5  * (C) Copyright 2004-2006, by Volker Berlin.
6  *
7  * Project Info: http://www.smallsql.de/
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ---------------
28  * ExpressionFunctionReturnP1StringAndBinary.java
29  * ---------------
30  * Author: Volker Berlin
31  *
32  * Created on 17.06.2006
33  */
34 package smallsql.database;
35
36
37 /**
38  * Super Class for String and binary functions which extends the metadata from the first parameter.
39  * @author Volker Berlin
40  */
41 abstract class ExpressionFunctionReturnP1StringAndBinary extends ExpressionFunctionReturnP1 {
42
43
44     final boolean getBoolean() throws Exception JavaDoc {
45         if(isNull()) return false;
46         return Utils.string2boolean(getString().trim());
47     }
48
49
50     final int getInt() throws Exception JavaDoc {
51         if(isNull()) return 0;
52         return Integer.parseInt(getString().trim());
53     }
54
55
56     final long getLong() throws Exception JavaDoc {
57         if(isNull()) return 0;
58         return Long.parseLong(getString().trim());
59     }
60
61
62     final float getFloat() throws Exception JavaDoc {
63         if(isNull()) return 0;
64         return Float.parseFloat(getString().trim());
65     }
66
67
68     final double getDouble() throws Exception JavaDoc {
69         if(isNull()) return 0;
70         return Double.parseDouble(getString().trim());
71     }
72
73
74     final long getMoney() throws Exception JavaDoc {
75         if(isNull()) return 0;
76         return Money.parseMoney(getString().trim());
77     }
78
79
80     final MutableNumeric getNumeric() throws Exception JavaDoc {
81         if(isNull()) return null;
82         return new MutableNumeric(getString().trim());
83     }
84
85
86     final Object JavaDoc getObject() throws Exception JavaDoc {
87         if(SSResultSetMetaData.isBinaryDataType(param1.getDataType()))
88             return getBytes();
89         return getString();
90     }
91 }
92
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