/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.bcel.generic;
import org.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 1152072 2011-07-29 01:54:05Z dbrosius $
* @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
* @see LineNumber
* @see MethodGen
*/
public class LineNumberGen implements InstructionTargeter, Cloneable, java.io.Serializable {
private static final long serialVersionUID = 4939965573936108738L;
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;
}
@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;
}
}