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


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
26 import java.util.List JavaDoc;
27
28 import org.xquark.extractor.common.Debug;
29 import org.xquark.extractor.sql.Context;
30 import org.xquark.extractor.sql.SqlExpression;
31
32 public class SfConcat extends org.xquark.extractor.sql.SfConcat
33 {
34
35     private static final String JavaDoc RCSRevision = "$Revision: 1.3 $";
36     private static final String JavaDoc RCSName = "$Name: $";
37
38
39     public SfConcat() {
40         super();
41     }
42
43     public SfConcat(List JavaDoc arguments) {
44         super(arguments);
45     }
46
47     public String JavaDoc toSql (Context context)
48     {
49         //Trace.enter(this,"toSql(Context context)");
50
51         StringBuffer JavaDoc retVal = new StringBuffer JavaDoc();
52         retVal.append("CONCAT(");
53         List JavaDoc args = getArguments();
54         Debug.assertTrue( 1<args.size(),"1<args.size()");
55
56         for (int i = 0; i < args.size(); i++) {
57             if (i!=0) retVal.append(",");
58             SqlExpression item = (SqlExpression)args.get(i);
59             retVal.append(item.toSql(context));
60             //retVal.append(" || ");
61 }
62         //retVal.delete(retVal.length()-4,retVal.length()-1);
63 retVal.append(")");
64         
65         //Trace.exit(this,"toSql(Context context)");
66 return retVal.toString();
67     }
68
69 }
70
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