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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.attribute.visitor;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
/**
* This LineNumberInfoVisitor remembers the lowest and the highest line
* numbers that it finds in all the line numbers that it visits. It
* ignores the sources of the line numbers.
*/
public class LineNumberRangeFinder
implements LineNumberInfoVisitor
{
private int lowestLineNumber = Integer.MAX_VALUE;
private int highestLineNumber = 0;
private boolean hasSource;
/**
* Returns the lowest line number that has been visited so far.
*/
public int getLowestLineNumber()
{
return lowestLineNumber;
}
/**
* Returns the highest line number that has been visited so far.
*/
public int getHighestLineNumber()
{
return highestLineNumber;
}
/**
* Returns whether any of the visited line numbers has a non-null source.
*/
public boolean hasSource()
{
return hasSource;
}
// Implementations for LineNumberInfoVisitor.
public void visitLineNumberInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfo lineNumberInfo)
{
int lineNumber = lineNumberInfo.u2lineNumber;
// Remember the lowest line number.
if (lowestLineNumber > lineNumber)
{
lowestLineNumber = lineNumber;
}
// Remember the highest line number.
if (highestLineNumber < lineNumber)
{
highestLineNumber = lineNumber;
}
if (lineNumberInfo.getSource() != null)
{
hasSource = true;
}
}
}
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