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Java > Open Source Codes > org > apache > bcel > verifier > structurals > ExceptionHandler


1 /*
2  * Copyright 2000-2004 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.bcel.verifier.structurals;
18
19
20 import org.apache.bcel.generic.InstructionHandle;
21 import org.apache.bcel.generic.ObjectType;
22
23 /**
24  * This class represents an exception handler; that is, an ObjectType
25  * representing a subclass of java.lang.Throwable and the instruction
26  * the handler starts off (represented by an InstructionContext).
27  *
28  * @version $Id: ExceptionHandler.java 371539 2006-01-23 14:08:00Z tcurdt $
29  * @author Enver Haase
30  */
31 public class ExceptionHandler{
32     /** The type of the exception to catch. NULL means ANY. */
33     private ObjectType catchtype;
34     
35     /** The InstructionHandle where the handling begins. */
36     private InstructionHandle handlerpc;
37
38     /** Leave instance creation to JustIce. */
39     ExceptionHandler(ObjectType catch_type, InstructionHandle handler_pc){
40         catchtype = catch_type;
41         handlerpc = handler_pc;
42     }
43
44     /**
45      * Returns the type of the exception that's handled. <B>'null' means 'ANY'.</B>
46      */
47     public ObjectType getExceptionType(){
48         return catchtype;
49     }
50
51     /**
52      * Returns the InstructionHandle where the handler starts off.
53      */
54     public InstructionHandle getHandlerStart(){
55         return handlerpc;
56     }
57 }
58
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