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1   /*
2    * Copyright 2004-2009 the Seasar Foundation and the Others.
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,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.cubby.plugin;
17  
18  import java.util.LinkedHashSet;
19  import java.util.Set;
20  
21  import javax.servlet.ServletContext;
22  
23  import org.seasar.cubby.action.ActionResult;
24  import org.seasar.cubby.routing.PathInfo;
25  import org.seasar.cubby.spi.Provider;
26  
27  /**
28   * プラグインの抽象的な実装です。
29   * 
30   * @author baba
31   */
32  public abstract class AbstractPlugin implements Plugin {
33  
34  	/** プラグインがサポートするサービスのセット。 */
35  	private final Set<Class<? extends Provider>> supportedServices = new LinkedHashSet<Class<? extends Provider>>();
36  
37  	/**
38  	 * プラグインがサポートするサービスを追加します。
39  	 * 
40  	 * @param service
41  	 *            サービス
42  	 */
43  	protected void support(final Class<? extends Provider> service) {
44  		supportedServices.add(service);
45  	}
46  
47  	/**
48  	 * このプラグインが指定されたサービスをサポートするかを示します。
49  	 * 
50  	 * @param service
51  	 *            サービス
52  	 * @return このプラグインが指定されたサービスをサポートする場合は <code>true</code>、そうでない場合は
53  	 *         <code>false</code>
54  	 */
55  	protected boolean isSupport(final Class<? extends Provider> service) {
56  		return supportedServices.contains(service);
57  	}
58  
59  	/**
60  	 * {@inheritDoc}
61  	 */
62  	public void initialize(final ServletContext servletContext)
63  			throws Exception {
64  	}
65  
66  	/**
67  	 * {@inheritDoc}
68  	 */
69  	public Set<Class<? extends Provider>> getSupportedServices() {
70  		return supportedServices;
71  	}
72  
73  	/**
74  	 * {@inheritDoc}
75  	 */
76  	public <S extends Provider> S getProvider(final Class<S> service) {
77  		return null;
78  	}
79  
80  	/**
81  	 * {@inheritDoc}
82  	 */
83  	public void ready() throws Exception {
84  	}
85  
86  	/**
87  	 * {@inheritDoc}
88  	 */
89  	public void destroy() {
90  	}
91  
92  	/**
93  	 * {@inheritDoc}
94  	 */
95  	public PathInfo invokeRouting(final RoutingInvocation invocation)
96  			throws Exception {
97  		return invocation.proceed();
98  	}
99  
100 	/**
101 	 * {@inheritDoc}
102 	 */
103 	public void invokeRequestProcessing(
104 			final RequestProcessingInvocation invocation) throws Exception {
105 		invocation.proceed();
106 	}
107 
108 	/**
109 	 * {@inheritDoc}
110 	 */
111 	public ActionResult invokeAction(final ActionInvocation invocation)
112 			throws Exception {
113 		return invocation.proceed();
114 	}
115 
116 	/**
117 	 * {@inheritDoc}
118 	 */
119 	public void invokeActionResult(final ActionResultInvocation invocation)
120 			throws Exception {
121 		invocation.proceed();
122 	}
123 
124 }