01: /*
02:
03: Derby - Class org.apache.derby.jdbc.ClientConnectionPoolDataSource40
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to You under the Apache License, Version 2.0
09: (the "License"); you may not use this file except in compliance with
10: the License. You may obtain a copy of the License at
11:
12: http://www.apache.org/licenses/LICENSE-2.0
13:
14: Unless required by applicable law or agreed to in writing, software
15: distributed under the License is distributed on an "AS IS" BASIS,
16: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: See the License for the specific language governing permissions and
18: limitations under the License.
19:
20: */
21:
22: package org.apache.derby.jdbc;
23:
24: import java.sql.SQLException;
25: import javax.sql.DataSource;
26: import org.apache.derby.client.am.ClientMessageId;
27: import org.apache.derby.client.am.SqlException;
28: import org.apache.derby.shared.common.reference.SQLState;
29:
30: /**
31: * ClientConnectionPoolDataSource40 is a factory for PooledConnection objects.
32: * An object that implements this interface
33: * will typically be registered with a naming service that is based on the
34: * Java Naming and Directory Interface (JNDI). Use this factory
35: * if your application runs under JDBC4.0.
36: * Use
37: * ClientConnectionPoolDataSource, instead, if your application runs under
38: * JDBC3.0 or JDBC2.0, that is, on the following Java Virtual Machines:
39: * <p/>
40: * <UL>
41: * <LI> JDBC 3.0 - Java 2 - JDK 1.4, J2SE 5.0
42: * <LI> JDBC 2.0 - Java 2 - JDK 1.2,1.3
43: * </UL>
44: */
45: public class ClientConnectionPoolDataSource40 extends
46: ClientConnectionPoolDataSource {
47: /**
48: * Returns false unless <code>interfaces</code> is implemented
49: *
50: * @param interfaces a Class defining an interface.
51: * @return true if this implements the interface or
52: * directly or indirectly wraps an object
53: * that does.
54: * @throws java.sql.SQLException if an error occurs while determining
55: * whether this is a wrapper for an object
56: * with the given interface.
57: */
58: public boolean isWrapperFor(Class<?> interfaces)
59: throws SQLException {
60: return interfaces.isInstance(this );
61: }
62:
63: /**
64: * Returns <code>this</code> if this class implements the interface
65: *
66: * @param interfaces a Class defining an interface
67: * @return an object that implements the interface
68: * @throws java.sql.SQLExption if no object if found that implements the
69: * interface
70: */
71: public <T> T unwrap(java.lang.Class<T> interfaces)
72: throws SQLException {
73: try {
74: return interfaces.cast(this );
75: } catch (ClassCastException cce) {
76: throw new SqlException(null, new ClientMessageId(
77: SQLState.UNABLE_TO_UNWRAP), interfaces)
78: .getSQLException();
79: }
80: }
81: }
|