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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.classfile.*; 59 60 /*** 61 * This class represents a line number within a method, i.e., give an instruction 62 * a line number corresponding to the source code line. 63 * 64 * @version $Id: LineNumberGen.java,v 1.3 2002/07/11 19:39:04 mdahm Exp $ 65 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 66 * @see LineNumber 67 * @see MethodGen 68 */ 69 public class LineNumberGen 70 implements InstructionTargeter, Cloneable, java.io.Serializable 71 { 72 private InstructionHandle ih; 73 private int src_line; 74 75 /*** 76 * Create a line number. 77 * 78 * @param ih instruction handle to reference 79 */ 80 public LineNumberGen(InstructionHandle ih, int src_line) { 81 setInstruction(ih); 82 setSourceLine(src_line); 83 } 84 85 /*** 86 * @return true, if ih is target of this line number 87 */ 88 public boolean containsTarget(InstructionHandle ih) { 89 return this.ih == ih; 90 } 91 92 /*** 93 * @param old_ih old target 94 * @param new_ih new target 95 */ 96 public void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) { 97 if(old_ih != ih) 98 throw new ClassGenException("Not targeting " + old_ih + ", but " + ih + "}"); 99 else 100 setInstruction(new_ih); 101 } 102 103 /*** 104 * Get LineNumber attribute . 105 * 106 * This relies on that the instruction list has already been dumped to byte code or 107 * or that the `setPositions' methods has been called for the instruction list. 108 */ 109 public LineNumber getLineNumber() { 110 return new LineNumber(ih.getPosition(), src_line); 111 } 112 113 public void setInstruction(InstructionHandle ih) { 114 BranchInstruction.notifyTarget(this.ih, ih, this); 115 116 this.ih = ih; 117 } 118 119 public Object clone() { 120 try { 121 return super.clone(); 122 } catch(CloneNotSupportedException e) { 123 System.err.println(e); 124 return null; 125 } 126 } 127 128 public InstructionHandle getInstruction() { return ih; } 129 public void setSourceLine(int src_line) { this.src_line = src_line; } 130 public int getSourceLine() { return src_line; } 131 }

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