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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   *  Unless required by applicable law or agreed to in writing, software
12   *  distributed under the License is distributed on an "AS IS" BASIS,
13   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   *  See the License for the specific language governing permissions and
15   *  limitations under the License.
16   *
17   */
18  package org.apache.bcel.verifier.structurals;
19  
20  
21  import org.apache.bcel.generic.InstructionHandle;
22  import org.apache.bcel.generic.ObjectType;
23  
24  /**
25   * This class represents an exception handler; that is, an ObjectType
26   * representing a subclass of java.lang.Throwable and the instruction
27   * the handler starts off (represented by an InstructionContext).
28   *
29   */
30  public class ExceptionHandler{
31      /** The type of the exception to catch. NULL means ANY. */
32      private final ObjectType catchType;
33  
34      /** The InstructionHandle where the handling begins. */
35      private final InstructionHandle handlerPc;
36  
37      /** Leave instance creation to JustIce. */
38      ExceptionHandler(final ObjectType catch_type, final InstructionHandle handler_pc) {
39          catchType = catch_type;
40          handlerPc = handler_pc;
41      }
42  
43      /**
44       * Returns the type of the exception that's handled. <B>'null' means 'ANY'.</B>
45       */
46      public ObjectType getExceptionType() {
47          return catchType;
48      }
49  
50      /**
51       * Returns the InstructionHandle where the handler starts off.
52       */
53      public InstructionHandle getHandlerStart() {
54          return handlerPc;
55      }
56  }