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/*
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* reserved comment block
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* DO NOT REMOVE OR ALTER!
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*/
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package com.sun.org.apache.bcel.internal.generic;
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/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2001 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" and
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* "Apache BCEL" must not be used to endorse or promote products
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* derived from this software without prior written permission. For
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* written permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* "Apache BCEL", nor may "Apache" appear in their name, without
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* prior written permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*/
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import com.sun.org.apache.bcel.internal.classfile.*;
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/**
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* This class represents a line number within a method, i.e., give an instruction
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* a line number corresponding to the source code line.
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*
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* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
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* @see LineNumber
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* @see MethodGen
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*/
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public class LineNumberGen
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implements InstructionTargeter, Cloneable, java.io.Serializable
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{
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private InstructionHandle ih;
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private int src_line;
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/**
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* Create a line number.
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*
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* @param ih instruction handle to reference
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*/
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public LineNumberGen(InstructionHandle ih, int src_line) {
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setInstruction(ih);
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setSourceLine(src_line);
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}
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/**
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* @return true, if ih is target of this line number
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*/
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17538
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@Override
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public boolean containsTarget(InstructionHandle ih) {
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return this.ih == ih;
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}
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/**
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* @param old_ih old target
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* @param new_ih new target
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*/
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@Override
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public void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) {
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if(old_ih != ih)
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throw new ClassGenException("Not targeting " + old_ih + ", but " + ih + "}");
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else
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setInstruction(new_ih);
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}
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/**
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* Get LineNumber attribute .
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*
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* This relies on that the instruction list has already been dumped to byte code or
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* or that the `setPositions' methods has been called for the instruction list.
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*/
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public LineNumber getLineNumber() {
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return new LineNumber(ih.getPosition(), src_line);
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}
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public final void setInstruction(InstructionHandle ih) {
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BranchInstruction.notifyTargetChanging(this.ih, this);
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this.ih = ih;
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BranchInstruction.notifyTargetChanged(this.ih, this);
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}
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@Override
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public Object clone() {
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try {
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return super.clone();
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} catch(CloneNotSupportedException e) {
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System.err.println(e);
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return null;
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}
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}
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public InstructionHandle getInstruction() { return ih; }
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public void setSourceLine(int src_line) { this.src_line = src_line; }
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public int getSourceLine() { return src_line; }
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}
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