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Java > Open Source Codes > org > apache > ojb > broker > accesslayer > SqlBasedReportQueryRsIterator


1 package org.apache.ojb.broker.accesslayer;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 import java.sql.ResultSetMetaData JavaDoc;
19 import java.sql.SQLException JavaDoc;
20
21 import org.apache.ojb.broker.PersistenceBrokerException;
22 import org.apache.ojb.broker.core.PersistenceBrokerImpl;
23 import org.apache.ojb.broker.metadata.JdbcTypesHelper;
24
25 /**
26  * ReporQueryRsIterator based on SQL-Statement
27  *
28  * @author <a HREF="mailto:jbraeuchi@hotmail.com">Jakob Braeuchi</a>
29  * @version $Id: SqlBasedReportQueryRsIterator.java,v 1.11.2.2 2005/12/21 22:22:58 tomdz Exp $
30  */
31 public class SqlBasedReportQueryRsIterator extends SqlBasedRsIterator
32 {
33     private ResultSetMetaData JavaDoc rsMetaData;
34     private int columnCount;
35
36     /**
37      * SqlBasedRsIterator constructor.
38      */
39     public SqlBasedReportQueryRsIterator(RsQueryObject queryObject, PersistenceBrokerImpl broker)
40             throws PersistenceBrokerException
41     {
42
43         super(queryObject, broker);
44         try
45         {
46             rsMetaData = getRsAndStmt().m_rs.getMetaData();
47             columnCount = rsMetaData.getColumnCount();
48         }
49         catch (SQLException JavaDoc e)
50         {
51             throw new PersistenceBrokerException(e);
52         }
53     }
54
55     /**
56      * returns an Object[] representing the columns of the current ResultSet row.
57      * There is no OJB object materialization, Proxy generation etc. involved
58      * to maximize performance.
59      */
60     protected Object JavaDoc getObjectFromResultSet() throws PersistenceBrokerException
61     {
62         Object JavaDoc[] result = new Object JavaDoc[columnCount];
63         for (int i = 0; i < columnCount; i++)
64         {
65             try
66             {
67                 int jdbcType = rsMetaData.getColumnType(i + 1);
68                 Object JavaDoc item = JdbcTypesHelper.getObjectFromColumn(getRsAndStmt().m_rs, new Integer JavaDoc(jdbcType), i + 1);
69                 result[i] = item;
70             }
71             catch (SQLException JavaDoc e)
72             {
73                 throw new PersistenceBrokerException(e);
74             }
75         }
76         return result;
77     }
78
79 }
80
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