Application: gvSIG desktop

package org.gvsig.expressionevaluator.swing.impl;

import java.util.Comparator;

import java.util.Objects;

import org.apache.commons.lang3.math.NumberUtils;

/*

 * To change this license header, choose License Headers in Project Properties.

 * To change this template file, choose Tools | Templates

 * and open the template in the editor.

 */

/**

 *

 * @author jjdelcerro

 */

public class ComparatorUtils {

    public static Comparator naturalComparator() {

        return new Comparator() {

            @Override

            public int compare(Object o1, Object o2) {

                if (o1 instanceof Double) {

                    return Double.compare((Double) o1, (Double) o2);

                } else if (o1 instanceof Float) {

                    return Double.compare((Float) o1, (Float) o2);

                } else if (o1 instanceof Number) {

                    return Double.compare( getLong((Number) o1), getLong((Number) o2));

                } else {

                    return Objects.toString(o1, "").compareTo(Objects.toString(o2, ""));

                }

            }

        };

    }

    private static long getLong(Number n) {

        if( n==null ) {

            return 0;

        }

        return n.longValue();

    }

}