| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| package com.sun.org.apache.bcel.internal.generic; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" and |
| * "Apache BCEL" must not be used to endorse or promote products |
| * derived from this software without prior written permission. For |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache BCEL", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| import com.sun.org.apache.bcel.internal.classfile.*; |
| |
| /** |
| * This class represents a line number within a method, i.e., give an instruction |
| * a line number corresponding to the source code line. |
| * |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @see LineNumber |
| * @see MethodGen |
| */ |
| public class LineNumberGen |
| implements InstructionTargeter, Cloneable, java.io.Serializable |
| { |
| private InstructionHandle ih; |
| private int src_line; |
| |
| /** |
| * Create a line number. |
| * |
| * @param ih instruction handle to reference |
| */ |
| public LineNumberGen(InstructionHandle ih, int src_line) { |
| setInstruction(ih); |
| setSourceLine(src_line); |
| } |
| |
| /** |
| * @return true, if ih is target of this line number |
| */ |
| @Override |
| public boolean containsTarget(InstructionHandle ih) { |
| return this.ih == ih; |
| } |
| |
| /** |
| * @param old_ih old target |
| * @param new_ih new target |
| */ |
| @Override |
| public void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) { |
| if(old_ih != ih) |
| throw new ClassGenException("Not targeting " + old_ih + ", but " + ih + "}"); |
| else |
| setInstruction(new_ih); |
| } |
| |
| /** |
| * Get LineNumber attribute . |
| * |
| * This relies on that the instruction list has already been dumped to byte code or |
| * or that the `setPositions' methods has been called for the instruction list. |
| */ |
| public LineNumber getLineNumber() { |
| return new LineNumber(ih.getPosition(), src_line); |
| } |
| |
| public final void setInstruction(InstructionHandle ih) { |
| BranchInstruction.notifyTargetChanging(this.ih, this); |
| this.ih = ih; |
| BranchInstruction.notifyTargetChanged(this.ih, this); |
| } |
| |
| @Override |
| public Object clone() { |
| try { |
| return super.clone(); |
| } catch(CloneNotSupportedException e) { |
| System.err.println(e); |
| return null; |
| } |
| } |
| |
| public InstructionHandle getInstruction() { return ih; } |
| public void setSourceLine(int src_line) { this.src_line = src_line; } |
| public int getSourceLine() { return src_line; } |
| } |