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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 /*** 58 * Denotes an unparameterized instruction to load a value from a local 59 * variable, e.g. ILOAD. 60 * 61 * @version $Id: LoadInstruction.java,v 1.1.1.1 2001/10/29 20:00:23 jvanzyl Exp $ 62 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 63 */ 64 public abstract class LoadInstruction extends LocalVariableInstruction 65 implements PushInstruction 66 { 67 /*** 68 * Empty constructor needed for the Class.newInstance() statement in 69 * Instruction.readInstruction(). Not to be used otherwise. 70 * tag and length are defined in readInstruction and initFromFile, respectively. 71 */ 72 LoadInstruction(short canon_tag, short c_tag) { 73 super(canon_tag, c_tag); 74 } 75 76 /*** 77 * @param opcode Instruction opcode 78 * @param c_tag Instruction number for compact version, ALOAD_0, e.g. 79 * @param n local variable index (unsigned short) 80 */ 81 protected LoadInstruction(short opcode, short c_tag, int n) { 82 super(opcode, c_tag, n); 83 } 84 85 /*** 86 * Call corresponding visitor method(s). The order is: 87 * Call visitor methods of implemented interfaces first, then 88 * call methods according to the class hierarchy in descending order, 89 * i.e., the most specific visitXXX() call comes last. 90 * 91 * @param v Visitor object 92 */ 93 public void accept(Visitor v) { 94 v.visitStackProducer(this); 95 v.visitPushInstruction(this); 96 v.visitTypedInstruction(this); 97 v.visitLocalVariableInstruction(this); 98 v.visitLoadInstruction(this); 99 } 100 } 101

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