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Java > Open Source Codes > org > apache > hivemind > service > MethodFab


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.service;
16
17 /**
18  * Represents a created method on a class; used to add catch handlers.
19  *
20  * @see org.apache.hivemind.service.ClassFab#addMethod(int, MethodSignature, String)
21  */
22 public interface MethodFab
23 {
24     /**
25      * Adds a catch to the method. The body must end with a return or throw. The special Javassist
26      * varaiable <code>$e</code> represents the caught exception.
27      */
28     public void addCatch(Class JavaDoc exceptionClass, String JavaDoc catchBody);
29
30     /**
31      * Extends the existing method with additional code. The new body can reference the return value
32      * generated by the existing body using the special variable <code>$_</code>, for example
33      * <code>$_ = 2 * $_</code>.
34      *
35      * @param body
36      * a block to execute after any existing code in the method
37      * @param asFinally
38      * if true, the block provided wil execute as with a finally block (even if an
39      * exception is thrown)
40      */
41
42     public void extend(String JavaDoc body, boolean asFinally);
43 }
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