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Java > Open Source Codes > smallsql > database > ExpressionFunctionRepeat


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  * ExpressionFunctionRepeat.java
29  * ---------------
30  * Author: Volker Berlin
31  *
32  * Created on 24.06.2006
33  */
34 package smallsql.database;
35
36 import java.io.ByteArrayOutputStream JavaDoc;
37
38
39 /**
40  * @author Volker Berlin
41  */
42 public class ExpressionFunctionRepeat extends ExpressionFunctionReturnP1StringAndBinary {
43
44     final int getFunction() {
45         return SQLTokenizer.REPEAT;
46     }
47
48
49     final byte[] getBytes() throws Exception JavaDoc{
50         if(isNull()) return null;
51         byte[] bytes = param1.getBytes();
52         int count = param2.getInt();
53         ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
54         for(int i=0; i<count; i++){
55             buffer.write(bytes);
56         }
57         return buffer.toByteArray();
58     }
59     
60     
61     final String JavaDoc getString() throws Exception JavaDoc {
62         if(isNull()) return null;
63         String JavaDoc str = param1.getString();
64         int count = param2.getInt();
65         StringBuffer JavaDoc buffer = new StringBuffer JavaDoc();
66         for(int i=0; i<count; i++){
67             buffer.append(str);
68         }
69         return buffer.toString();
70     }
71
72
73     int getPrecision() {
74         return SSResultSetMetaData.getDataTypePrecision( getDataType(), -1 );
75     }
76
77     
78
79 }
80
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