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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.ExceptionConstants; 58 59 /*** 60 * Super class for the xRETURN family of instructions. 61 * 62 * @version $Id: ReturnInstruction.java,v 1.1.1.1 2001/10/29 20:00:26 jvanzyl Exp $ 63 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 64 */ 65 public abstract class ReturnInstruction extends Instruction 66 implements ExceptionThrower, TypedInstruction, StackConsumer { 67 /*** 68 * Empty constructor needed for the Class.newInstance() statement in 69 * Instruction.readInstruction(). Not to be used otherwise. 70 */ 71 ReturnInstruction() {} 72 73 /*** 74 * @param opcode of instruction 75 */ 76 protected ReturnInstruction(short opcode) { 77 super(opcode, (short)1); 78 } 79 80 public Type getType() { 81 switch(opcode) { 82 case Constants.IRETURN: return Type.INT; 83 case Constants.LRETURN: return Type.LONG; 84 case Constants.FRETURN: return Type.FLOAT; 85 case Constants.DRETURN: return Type.DOUBLE; 86 case Constants.ARETURN: return Type.OBJECT; 87 case Constants.RETURN: return Type.VOID; 88 89 default: // Never reached 90 throw new ClassGenException("Unknown type " + opcode); 91 } 92 } 93 94 public Class[] getExceptions() { 95 return new Class[] { ExceptionConstants.ILLEGAL_MONITOR_STATE }; 96 } 97 98 /*** @return type associated with the instruction 99 */ 100 public Type getType(ConstantPoolGen cp) { 101 return getType(); 102 } 103 } 104

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