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1 package org.apache.bcel.generic; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 import org.apache.bcel.Constants; 57 import org.apache.bcel.generic.InstructionHandle; 58 59 /*** 60 * Returnaddress, the type JSR or JSR_W instructions push upon the stack. 61 * 62 * see vmspec2 §3.3.3 63 * @version $Id: ReturnaddressType.java,v 1.1.1.1 2001/10/29 20:00:26 jvanzyl Exp $ 64 * @author <A HREF="http://www.inf.fu-berlin.de/~ehaase">Enver Haase</A> 65 */ 66 public class ReturnaddressType extends Type { 67 68 public static final ReturnaddressType NO_TARGET = new ReturnaddressType(); 69 private InstructionHandle returnTarget; 70 71 /*** 72 * A Returnaddress [that doesn't know where to return to]. 73 */ 74 private ReturnaddressType(){ 75 super(Constants.T_ADDRESS, "<return address>"); 76 } 77 78 /*** 79 * Creates a ReturnaddressType object with a target. 80 */ 81 public ReturnaddressType(InstructionHandle returnTarget) { 82 super(Constants.T_ADDRESS, "<return address targeting "+returnTarget+">"); 83 this.returnTarget = returnTarget; 84 } 85 86 /*** 87 * Returns if the two Returnaddresses refer to the same target. 88 */ 89 public boolean equals(Object rat){ 90 if(!(rat instanceof ReturnaddressType)) 91 return false; 92 93 return ((ReturnaddressType)rat).returnTarget.equals(this.returnTarget); 94 } 95 96 /*** 97 * @return the target of this ReturnaddressType 98 */ 99 public InstructionHandle getTarget(){ 100 return returnTarget; 101 } 102 }

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