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1   /*
2    * Copyright 2002,2004 The Apache Software Foundation.
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  
17  package org.apache.commons.jexl.util.introspection;
18  
19  
20  
21  /***
22   *  Method used for regular method invocation
23   *
24   *    $foo.bar()
25   *
26   *
27   * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
28   * @version $Id: VelMethod.java,v 1.3 2004/02/28 13:45:22 yoavs Exp $
29   */
30  public interface VelMethod
31  {
32      /***
33       *  invocation method - called when the method invocationshould be
34       *  preformed and a value returned
35       */
36      public Object invoke(Object o, Object[] params)
37          throws Exception;
38  
39      /***
40       *  specifies if this VelMethod is cacheable and able to be
41       *  reused for this class of object it was returned for
42       *
43       *  @return true if can be reused for this class, false if not
44       */
45      public boolean isCacheable();
46  
47      /***
48       *  returns the method name used
49       */
50      public String getMethodName();
51  
52      /***
53       *  returns the return type of the method invoked
54       */
55      public Class getReturnType();
56  }