ConnectionProxy


1   /*
2    * Copyright 2002-2007 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.datasource;
18  
19  import java.sql.Connection  ;
20  
21  /**
22   * Subinterface of {@link java.sql.Connection} to be implemented by
23   * Connection proxies. Allows access to the underlying target Connection.
24   *
25   * <p>This interface can be checked when there is a need to cast to a
26   * native JDBC Connection such as Oracle's OracleConnection. Spring's
27   * {@link org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractorAdapter}
28   * automatically detects such proxies before delegating to the actual
29   * unwrapping for a specific connection pool.
30   *
31   * @author Juergen Hoeller
32   * @since 1.1
33   * @see TransactionAwareDataSourceProxy
34   * @see LazyConnectionDataSourceProxy
35   */
36  public interface ConnectionProxy extends Connection   {
37  
38      /**
39       * Return the target Connection of this proxy.
40       * <p>This will typically be the native driver Connection
41       * or a wrapper from a connection pool.
42       * @return the underlying Connection (never <code>null</code>)
43       */
44      Connection   getTargetConnection();
45  
46  }
47

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