LocalBeanInvokingAction


1   /*
2    * Copyright 2002-2006 the original author or authors.
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, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.springframework.webflow.action;
17  
18  import java.io.Serializable  ;
19  
20  import org.springframework.binding.method.MethodSignature;
21  import org.springframework.util.Assert;
22  import org.springframework.webflow.execution.RequestContext;
23  
24  /**
25   * Thin action proxy that delegates to a method on an arbitrary bean. The bean
26   * instance is managed locally by this Action in an instance variable.
27   * 
28   * @author Keith Donald
29   */
30  class LocalBeanInvokingAction extends AbstractBeanInvokingAction implements Serializable   {
31  
32      /**
33       * The target bean (any POJO) to invoke.
34       */
35      private Object   bean;
36  
37      /**
38       * Creates a bean invoking action that invokes a method on the specified bean.
39       * The bean may be a proxy providing a layer of indirection if necessary.
40       * @param bean the bean to invoke
41       */
42      public LocalBeanInvokingAction(MethodSignature methodSignature, Object   bean) {
43          super(methodSignature);
44          Assert.notNull(bean, "The bean to invoke by this action cannot be null");
45          this.bean = bean;
46      }
47  
48      /**
49       * Returns the target bean to invoke methods on.
50       */
51      public Object   getBean() {
52          return bean;
53      }
54  
55      protected Object   getBean(RequestContext context) throws Exception   {
56          return getBean();
57      }
58  }
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