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1   /*
2    * Copyright 2004-2010 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  
17  package org.seasar.cubby.plugins.spring.spi;
18  
19  import org.seasar.cubby.spi.ContainerProvider;
20  import org.seasar.cubby.spi.container.Container;
21  import org.seasar.cubby.spi.container.LookupException;
22  import org.springframework.beans.factory.BeanFactoryUtils;
23  import org.springframework.context.ApplicationContext;
24  import org.springframework.context.ApplicationContextAware;
25  
26  /**
27   * {@link ApplicationContext} による {@link Container} の実装を提供します。
28   * 
29   * @author suzuki-kei
30   * @author someda
31   */
32  public class SpringContainerProvider implements ContainerProvider,
33  		ApplicationContextAware {
34  
35  	/** コンテナ。 */
36  	private Container container;
37  
38  	/**
39  	 * {@inheritDoc}
40  	 */
41  	public Container getContainer() {
42  		return container;
43  	}
44  
45  	/**
46  	 * アプリケーションコンテキストを設定します。
47  	 * 
48  	 * @param applicationContext
49  	 *            アプリケーションコンテキスト
50  	 */
51  	public void setApplicationContext(
52  			final ApplicationContext applicationContext) {
53  		this.container = new SpringContainerImpl(applicationContext);
54  	}
55  
56  	/**
57  	 * {@link ApplicationContext} による {@link Container} の実装です。
58  	 */
59  	private static class SpringContainerImpl implements Container {
60  
61  		private final ApplicationContext applicationContext;
62  
63  		public SpringContainerImpl(final ApplicationContext applicationContext) {
64  			this.applicationContext = applicationContext;
65  		}
66  
67  		public <T> T lookup(final Class<T> type) throws LookupException {
68  			String[] names = BeanFactoryUtils
69  					.beanNamesForTypeIncludingAncestors(applicationContext,
70  							type);
71  			if (names == null || names.length < 1) {
72  				throw new LookupException(type + " component not found.");
73  			}
74  			return type.cast(applicationContext.getBean(names[0], type));
75  		}
76  
77  	}
78  
79  }