| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| package org.apache.bcel.verifier.structurals; |
| |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.bcel.generic.CodeExceptionGen; |
| import org.apache.bcel.generic.InstructionHandle; |
| import org.apache.bcel.generic.MethodGen; |
| |
| /** |
| * This class allows easy access to ExceptionHandler objects. |
| * |
| * @version $Id$ |
| * @author Enver Haase |
| */ |
| public class ExceptionHandlers{ |
| /** |
| * The ExceptionHandler instances. |
| * Key: InstructionHandle objects, Values: HashSet<ExceptionHandler> instances. |
| */ |
| private final Map<InstructionHandle, Set<ExceptionHandler>> exceptionhandlers; |
| |
| /** |
| * Constructor. Creates a new ExceptionHandlers instance. |
| */ |
| public ExceptionHandlers(MethodGen mg){ |
| exceptionhandlers = new HashMap<InstructionHandle, Set<ExceptionHandler>>(); |
| CodeExceptionGen[] cegs = mg.getExceptionHandlers(); |
| for (CodeExceptionGen ceg : cegs) { |
| ExceptionHandler eh = new ExceptionHandler(ceg.getCatchType(), ceg.getHandlerPC()); |
| for (InstructionHandle ih=ceg.getStartPC(); ih != ceg.getEndPC().getNext(); ih=ih.getNext()){ |
| Set<ExceptionHandler> hs; |
| hs = exceptionhandlers.get(ih); |
| if (hs == null){ |
| hs = new HashSet<ExceptionHandler>(); |
| exceptionhandlers.put(ih, hs); |
| } |
| hs.add(eh); |
| } |
| } |
| } |
| |
| /** |
| * Returns all the ExceptionHandler instances representing exception |
| * handlers that protect the instruction ih. |
| */ |
| public ExceptionHandler[] getExceptionHandlers(InstructionHandle ih){ |
| Set<ExceptionHandler> hsSet = exceptionhandlers.get(ih); |
| if (hsSet == null) { |
| return new ExceptionHandler[0]; |
| } |
| return hsSet.toArray(new ExceptionHandler[hsSet.size()]); |
| } |
| |
| } |