package org.aspectj.apache.bcel.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 org.aspectj.apache.bcel.classfile.LineNumber;
/**
* This class represents a line number within a method, i.e., give an instruction
* a line number corresponding to the source code line.
*
* @version $Id: LineNumberGen.java,v 1.4 2004/11/22 08:31:27 aclement Exp $
* @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
*/
public boolean containsTarget(InstructionHandle ih) {
return this.ih == ih;
}
/**
* @param old_ih old target
* @param new_ih new target
*/
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 void setInstruction(InstructionHandle ih) {
BranchInstruction.notifyTarget(this.ih, ih, this);
this.ih = ih;
}
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; }
}