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Java > Open Source Codes > org > springframework > jdbc > support > nativejdbc > XAPoolNativeJdbcExtractor


1 /*
2  * Copyright 2002-2005 the original author or authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.springframework.jdbc.support.nativejdbc;
18
19 import java.sql.Connection JavaDoc;
20 import java.sql.PreparedStatement JavaDoc;
21 import java.sql.SQLException JavaDoc;
22
23 import org.enhydra.jdbc.core.CoreConnection;
24 import org.enhydra.jdbc.core.CorePreparedStatement;
25
26 /**
27  * Implementation of the NativeJdbcExtractor interface for ObjectWeb's XAPool.
28  *
29  * <p>Returns underlying native Connections and native PreparedStatements to
30  * application code instead of XAPool's wrapper implementations; unwraps the
31  * Connection for native Statements and native CallableStatements.
32  * The returned JDBC classes can then safely be cast, e.g. to
33  * <code>oracle.jdbc.OracleConnection</code>.
34  *
35  * <p>This NativeJdbcExtractor can be set just to <i>allow</i> working with
36  * an XAPool DataSource: If a given object is not an XAPool wrapper, it will
37  * be returned as-is.
38  *
39  * @author Juergen Hoeller
40  * @since 06.02.2004
41  */
42 public class XAPoolNativeJdbcExtractor extends NativeJdbcExtractorAdapter {
43
44     /**
45      * Return <code>true</code>, as CoreStatement does not allow access to the
46      * underlying Connection.
47      */
48     public boolean isNativeConnectionNecessaryForNativeStatements() {
49         return true;
50     }
51
52     /**
53      * Return <code>true</code>, as CoreCallableStatement does not allow access to the
54      * underlying Connection.
55      */
56     public boolean isNativeConnectionNecessaryForNativeCallableStatements() {
57         return true;
58     }
59
60     protected Connection JavaDoc doGetNativeConnection(Connection JavaDoc con) throws SQLException JavaDoc {
61         if (con instanceof CoreConnection) {
62             return ((CoreConnection) con).con;
63         }
64         return con;
65     }
66
67     public PreparedStatement JavaDoc getNativePreparedStatement(PreparedStatement JavaDoc ps) throws SQLException JavaDoc {
68         if (ps instanceof CorePreparedStatement) {
69             return ((CorePreparedStatement) ps).ps;
70         }
71         return ps;
72     }
73
74 }
75
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