package net.toodarkpark.util.comparison;

import java.util.*;
import org.apache.commons.collections.Predicate;

/*
 * Is one object less than another?
 */
public class LessThanPredicate implements Predicate
{
    protected Object comparisonValue;
    protected Comparator comparator;

    private LessThanPredicate()
    {
        super();

        comparator = null;
        comparisonValue = null;
    }

	public LessThanPredicate( Object aComparisonValue )
	{
		this( null, aComparisonValue );
	}

	public LessThanPredicate( Comparator aComparator, Object aComparisonValue )
    {
        this();

        comparator = aComparator;
        comparisonValue = aComparisonValue;
    }

    public boolean evaluate( Object value ) throws ClassCastException, NullPointerException
    {
		if( comparator != null )
		{
			return comparator.compare( comparisonValue, value ) < 0;
		}
		else
		{
			return (Comparable)comparisonValue.compare( value ) < 0;
		}
    }
}