gov.sandia.cognition.collection.NumberComparator Maven / Gradle / Ivy
/*
* File: NumberComparator.java
* Authors: Kevin R. Dixon
* Company: Sandia National Laboratories
* Project: Cognitive Foundry
*
* Copyright Feb 2, 2009, Sandia Corporation.
* Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
* license for use of this work by or on behalf of the U.S. Government.
* Export of this program may require a license from the United States
* Government. See CopyrightHistory.txt for complete details.
*
*/
package gov.sandia.cognition.collection;
import gov.sandia.cognition.util.AbstractCloneableSerializable;
import java.util.Comparator;
/**
* Compares two Numbers (base class of Double, Integer, etc.) for sorting.
* @author Kevin R. Dixon
* @since 3.0
*/
public class NumberComparator
extends AbstractCloneableSerializable
implements Comparator
{
/**
* Instance of the NumberComparator.
*/
public static final NumberComparator INSTANCE = new NumberComparator();
/**
* Creates a new instance of NumberComparator
*/
public NumberComparator()
{
}
public int compare(
Number o1,
Number o2 )
{
double v1 = o1.doubleValue();
double v2 = o2.doubleValue();
if( v1 < v2 )
{
return -1;
}
else if( v1 > v2 )
{
return 1;
}
else
{
return 0;
}
}
}