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Java > Open Source Codes > org > apache > commons > dbutils > handlers > MapListHandler


1 /*
2  * $Header: /home/cvs/jakarta-commons/dbutils/src/java/org/apache/commons/dbutils/handlers/MapListHandler.java,v 1.1 2003/11/02 19:15:24 dgraham Exp $
3  * $Revision: 1.1 $
4  * $Date: 2003/11/02 19:15:24 $
5  *
6  * ====================================================================
7  *
8  * The Apache Software License, Version 1.1
9  *
10  * Copyright (c) 2003 The Apache Software Foundation. All rights
11  * reserved.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  *
17  * 1. Redistributions of source code must retain the above copyright
18  * notice, this list of conditions and the following disclaimer.
19  *
20  * 2. Redistributions in binary form must reproduce the above copyright
21  * notice, this list of conditions and the following disclaimer in
22  * the documentation and/or other materials provided with the
23  * distribution.
24  *
25  * 3. The end-user documentation included with the redistribution, if
26  * any, must include the following acknowledgement:
27  * "This product includes software developed by the
28  * Apache Software Foundation (http://www.apache.org/)."
29  * Alternately, this acknowledgement may appear in the software itself,
30  * if and wherever such third-party acknowledgements normally appear.
31  *
32  * 4. The names "The Jakarta Project", "Commons", and "Apache Software
33  * Foundation" must not be used to endorse or promote products derived
34  * from this software without prior written permission. For written
35  * permission, please contact apache@apache.org.
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37  * 5. Products derived from this software may not be called "Apache"
38  * nor may "Apache" appear in their names without prior written
39  * permission of the Apache Software Foundation.
40  *
41  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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45  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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52  * SUCH DAMAGE.
53  * ====================================================================
54  *
55  * This software consists of voluntary contributions made by many
56  * individuals on behalf of the Apache Software Foundation. For more
57  * information on the Apache Software Foundation, please see
58  * <http://www.apache.org/>.
59  *
60  */
61
62 package org.apache.commons.dbutils.handlers;
63
64 import java.sql.ResultSet JavaDoc;
65 import java.sql.SQLException JavaDoc;
66 import java.util.ArrayList JavaDoc;
67 import java.util.List JavaDoc;
68
69 import org.apache.commons.dbutils.BasicRowProcessor;
70 import org.apache.commons.dbutils.ResultSetHandler;
71 import org.apache.commons.dbutils.RowProcessor;
72
73 /**
74  * <code>ResultSetHandler</code> implementation that converts a
75  * <code>ResultSet</code> into a <code>List</code> of <code>Map</code>s.
76  * This class is thread safe.
77  *
78  * @see ResultSetHandler
79  *
80  * @author David Graham
81  */
82 public class MapListHandler implements ResultSetHandler {
83
84     /**
85      * The RowProcessor implementation to use when converting rows
86      * into Maps.
87      */
88     private RowProcessor convert = BasicRowProcessor.instance();
89
90     /**
91      * Creates a new instance of MapListHandler using a
92      * <code>BasicRowProcessor</code> for conversion.
93      */
94     public MapListHandler() {
95         super();
96     }
97
98     /**
99      * Creates a new instance of MapListHandler.
100      *
101      * @param convert The <code>RowProcessor</code> implementation
102      * to use when converting rows into Maps.
103      */
104     public MapListHandler(RowProcessor convert) {
105         super();
106         this.convert = convert;
107     }
108
109     /**
110      * Converts the <code>ResultSet</code> rows into a <code>List</code> of
111      * <code>Map</code> objects.
112      *
113      * @return A <code>List</code> of <code>Map</code>s, never null.
114      *
115      * @throws SQLException
116      *
117      * @see org.apache.commons.dbutils.ResultSetHandler#handle(java.sql.ResultSet)
118      */
119     public Object JavaDoc handle(ResultSet JavaDoc rs) throws SQLException JavaDoc {
120
121         List JavaDoc results = new ArrayList JavaDoc();
122
123         while (rs.next()) {
124             results.add(this.convert.toMap(rs));
125         }
126
127         return results;
128     }
129
130 }
131
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