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
020
021import org.apache.bcel.generic.InstructionHandle;
022import org.apache.bcel.generic.ObjectType;
023
024/**
025 * This class represents an exception handler; that is, an ObjectType
026 * representing a subclass of java.lang.Throwable and the instruction
027 * the handler starts off (represented by an InstructionContext).
028 *
029 */
030public class ExceptionHandler{
031    /** The type of the exception to catch. NULL means ANY. */
032    private final ObjectType catchtype;
033
034    /** The InstructionHandle where the handling begins. */
035    private final InstructionHandle handlerpc;
036
037    /** Leave instance creation to JustIce. */
038    ExceptionHandler(final ObjectType catch_type, final InstructionHandle handler_pc) {
039        catchtype = catch_type;
040        handlerpc = handler_pc;
041    }
042
043    /**
044     * Returns the type of the exception that's handled. <B>'null' means 'ANY'.</B>
045     */
046    public ObjectType getExceptionType() {
047        return catchtype;
048    }
049
050    /**
051     * Returns the InstructionHandle where the handler starts off.
052     */
053    public InstructionHandle getHandlerStart() {
054        return handlerpc;
055    }
056}