01: package org.apache.ojb.broker.accesslayer;
02:
03: /* Copyright 2002-2005 The Apache Software Foundation
04: *
05: * Licensed under the Apache License, Version 2.0 (the "License");
06: * you may not use this file except in compliance with the License.
07: * You may obtain a copy of the License at
08: *
09: * 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 org.apache.ojb.broker.util.factory.ConfigurableFactory;
19:
20: /**
21: * Factory for {@link org.apache.ojb.broker.accesslayer.ConnectionFactory} implementations.
22: * <br/>
23: * See also {@link org.apache.ojb.broker.accesslayer.ConnectionManagerFactory}
24: *
25: * @version $Id: ConnectionFactoryFactory.java,v 1.10.2.1 2005/12/21 22:22:58 tomdz Exp $
26: */
27: public class ConnectionFactoryFactory extends ConfigurableFactory {
28: private static ConnectionFactoryFactory singleton = new ConnectionFactoryFactory();
29: private ConnectionFactory conFactory;
30:
31: public synchronized static ConnectionFactoryFactory getInstance() {
32: return singleton;
33: }
34:
35: /**
36: * Returns the used {@link ConnectionFactory} implementation. Currently each call
37: * returns the same implementation instance.
38: */
39: public synchronized ConnectionFactory createConnectionFactory() {
40: if (conFactory == null) {
41: conFactory = (ConnectionFactory) createNewInstance();
42: }
43: return conFactory;
44: }
45:
46: protected String getConfigurationKey() {
47: return "ConnectionFactoryClass";
48: }
49: }
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