001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.verifier.structurals; 019 020import org.apache.bcel.generic.InstructionHandle; 021import org.apache.bcel.generic.ObjectType; 022 023/** 024 * This class represents an exception handler; that is, an ObjectType representing a subclass of java.lang.Throwable and 025 * the instruction the handler starts off (represented by an InstructionContext). 026 * 027 */ 028public class ExceptionHandler { 029 030 static final ExceptionHandler[] EMPTY_ARRAY = {}; 031 032 /** The type of the exception to catch. NULL means ANY. */ 033 private final ObjectType catchType; 034 035 /** The InstructionHandle where the handling begins. */ 036 private final InstructionHandle handlerPc; 037 038 /** Leave instance creation to JustIce. */ 039 ExceptionHandler(final ObjectType catchType, final InstructionHandle handlerPc) { 040 this.catchType = catchType; 041 this.handlerPc = handlerPc; 042 } 043 044 /** 045 * Returns the type of the exception that's handled. <B>'null' means 'ANY'.</B> 046 */ 047 public ObjectType getExceptionType() { 048 return catchType; 049 } 050 051 /** 052 * Returns the InstructionHandle where the handler starts off. 053 */ 054 public InstructionHandle getHandlerStart() { 055 return handlerPc; 056 } 057}