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Java > Open Source Codes > org > xquark > extractor > mysql > sql > SfRowidToChar


1 /*
2  * This file belongs to the XQuark distribution.
3  * Copyright (C) 2003 Universite de Versailles Saint-Quentin.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307.
18  * You can also get it at http://www.gnu.org/licenses/lgpl.html
19  *
20  * For more information on this software, see http://www.xquark.org.
21  */
22
23 package org.xquark.extractor.mysql.sql;
24
25 import org.xquark.extractor.common.Debug;
26 import org.xquark.extractor.sql.Context;
27 import org.xquark.extractor.sql.SqlExpression;
28 import org.xquark.extractor.sql.SqlFunction;
29
30 public class SfRowidToChar extends SqlFunction {
31     private static final String JavaDoc RCSRevision = "$Revision: 1.4 $";
32     private static final String JavaDoc RCSName = "$Name: $";
33
34
35     public SfRowidToChar() {
36     }
37
38     public SfRowidToChar(SqlExpression expr) {
39         super();
40         setArgument(0, expr);
41     }
42
43
44     public String JavaDoc toSql (Context context)
45     {
46         //Trace.enter(this,"toSql");
47 StringBuffer JavaDoc retVal = new StringBuffer JavaDoc();
48
49         SqlExpression expr = getArgument(0);
50
51         Debug.assertTrue(expr instanceof SqlAttributeExpression, "expr instanceof SqlAttributeExpression");
52         String JavaDoc attrName = ((SqlAttributeExpression)expr).getAttribute();
53         Debug.assertTrue (attrName.equalsIgnoreCase("rowid"),"attrName.equalsIgnoreCase('rowid')");
54
55         retVal.append("ROWIDTOCHAR(");
56         retVal.append(expr.toSql(context));
57         retVal.append(")");
58
59         //Trace.exit(this,"toSql");
60 return retVal.toString();
61     }
62
63 }
64
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