01: /*
02: * Copyright 2000-2001,2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: /*
18:
19: */
20:
21: package org.apache.wsrp4j.consumer.driver;
22:
23: import java.util.Hashtable;
24: import java.util.Iterator;
25:
26: import org.apache.wsrp4j.consumer.ConsumerEnvironment;
27: import org.apache.wsrp4j.consumer.PortletDriver;
28: import org.apache.wsrp4j.consumer.PortletDriverRegistry;
29: import org.apache.wsrp4j.consumer.WSRPPortlet;
30: import org.apache.wsrp4j.exception.WSRPException;
31:
32: public class PortletDriverRegistryImpl implements PortletDriverRegistry {
33:
34: private static PortletDriverRegistry instance = null;
35:
36: private Hashtable portletDrivers = null;
37:
38: private ConsumerEnvironment consumerEnv = null;
39:
40: private PortletDriverRegistryImpl(ConsumerEnvironment consumerEnv) {
41:
42: this .portletDrivers = new Hashtable();
43: this .consumerEnv = consumerEnv;
44: }
45:
46: public static PortletDriverRegistry getInstance(
47: ConsumerEnvironment consumerEnv) {
48: if (instance == null) {
49: instance = new PortletDriverRegistryImpl(consumerEnv);
50: }
51:
52: return instance;
53: }
54:
55: /**
56: * Get an portlet driver for the given portlet. If there is no portlet driver
57: * object cached a new portlet driver will be created and returned.
58: *
59: * @param portlet The portlet the returned portlet driver is bind to
60: *
61: * @return The portlet driver for this portlet
62: **/
63: public PortletDriver getPortletDriver(WSRPPortlet portlet)
64: throws WSRPException {
65:
66: PortletDriver driver = null;
67:
68: if ((driver = (PortletDriver) portletDrivers.get(portlet
69: .getPortletKey().toString())) == null) {
70: driver = new PortletDriverImpl(portlet, consumerEnv);
71: }
72:
73: return driver;
74: }
75:
76: /**
77: * Get all cached portlet drivers.
78: *
79: * @return Iterator with all portlet drivers in the registry
80: **/
81: public Iterator getAllPortletDrivers() {
82: return portletDrivers.values().iterator();
83: }
84: }
|