1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.orchestra.viewController;
20
21 import org.apache.myfaces.orchestra.frameworkAdapter.FrameworkAdapter;
22
23 /**
24 * Provides facility to look up the ViewControllerManager instance that is used by
25 * Orchestra to invoke lifecycle methods on "controller beans" associated with the
26 * current view.
27 *
28 * @since 1.3
29 */
30 public class ViewControllerManagerFactory
31 {
32 private final static ViewControllerManager DEFAULT_VCM = new DefaultViewControllerManager();
33
34 /**
35 * Returns the singleton ViewControllerManager object.
36 * <p>
37 * If a bean with name "org.apache.myfaces.orchestra.viewController.ViewControllerManager" exists
38 * then this is returned. This bean is expected to be a singleton.
39 * <p>
40 * Otherwise a singleton instance of {@link DefaultViewControllerManager} will be returned.
41 */
42 public static ViewControllerManager getInstance()
43 {
44 ViewControllerManager manager = (ViewControllerManager)
45 FrameworkAdapter.getCurrentInstance().getBean(ViewControllerManager.VIEW_CONTROLLER_MANAGER_NAME);
46 if (manager != null)
47 {
48 return manager;
49 }
50
51 return DEFAULT_VCM;
52 }
53 }