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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 57 import org.apache.bcel.Constants; 58 import org.apache.bcel.ExceptionConstants; 59 60 /*** 61 * PUTFIELD - Put field in object 62 * <PRE>Stack: ..., objectref, value -> ...</PRE> 63 * OR 64 * <PRE>Stack: ..., objectref, value.word1, value.word2 -> ...</PRE> 65 * 66 * @version $Id: PUTFIELD.java,v 1.3 2001/12/18 14:52:28 jvanzyl Exp $ 67 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 68 */ 69 public class PUTFIELD 70 extends FieldInstruction 71 implements PopInstruction,ExceptionThrower{ 72 /*** 73 * Empty constructor needed for the Class.newInstance() statement in 74 * Instruction.readInstruction(). Not to be used otherwise. 75 */ 76 PUTFIELD() {} 77 78 public PUTFIELD(int index) { 79 super(Constants.PUTFIELD, index); 80 } 81 82 public int consumeStack(ConstantPoolGen cpg) { return getFieldSize(cpg) + 1; } 83 84 public Class[] getExceptions() { 85 Class[] cs = new Class[2 + ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length]; 86 87 System.arraycopy(ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION, 0, 88 cs, 0, ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length); 89 90 cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length+1] = 91 ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR; 92 cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length] = 93 ExceptionConstants.NULL_POINTER_EXCEPTION; 94 95 return cs; 96 } 97 98 99 /*** 100 * Call corresponding visitor method(s). The order is: 101 * Call visitor methods of implemented interfaces first, then 102 * call methods according to the class hierarchy in descending order, 103 * i.e., the most specific visitXXX() call comes last. 104 * 105 * @param v Visitor object 106 */ 107 public void accept(Visitor v) { 108 v.visitExceptionThrower(this); 109 v.visitStackConsumer(this); 110 v.visitPopInstruction(this); 111 v.visitTypedInstruction(this); 112 v.visitLoadClass(this); 113 v.visitCPInstruction(this); 114 v.visitFieldOrMethod(this); 115 v.visitFieldInstruction(this); 116 v.visitPUTFIELD(this); 117 } 118 }

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