01: /*
02: * Copyright 2002,2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: * Method used for regular method invocation.
21: *
22: * $foo.bar()
23: *
24: *
25: * @since 1.0
26: * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
27: * @version $Id: VelMethod.java 398513 2006-05-01 03:42:52Z dion $
28: */
29: public interface VelMethod {
30: /**
31: * invocation method - called when the method invocation should be performed
32: * and a value returned.
33:
34: * @param o the object
35: * @param params method parameters.
36: * @return the result
37: * @throws Exception on any error.
38: */
39: Object invoke(Object o, Object[] params) throws Exception;
40:
41: /**
42: * specifies if this VelMethod is cacheable and able to be reused for this
43: * class of object it was returned for.
44: *
45: * @return true if can be reused for this class, false if not
46: */
47: boolean isCacheable();
48:
49: /**
50: * Gets the method name used.
51: * @return method name
52: */
53: String getMethodName();
54:
55: /**
56: * returns the return type of the method invoked.
57: * @return return type
58: */
59: Class getReturnType();
60: }
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