package com.floreantpos.util;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.NumberFormat;
import java.text.ParseException;

import org.apache.commons.lang.StringUtils;

public class NumberUtil {
	private final static NumberFormat numberFormat = NumberFormat.getNumberInstance();

	static {
		numberFormat.setMinimumFractionDigits(2);
		numberFormat.setMaximumFractionDigits(2);
	}

	public static double roundToTwoDigit(double value) {
	    BigDecimal bd = new BigDecimal(value);
	    bd = bd.setScale(2, RoundingMode.HALF_UP);
	    return bd.doubleValue();
	}

	public static String formatNumber(Double number) {
		if(number == null) {
			return numberFormat.format(0);
		}

		String value = numberFormat.format(number);

		if(value.startsWith("-")) { //$NON-NLS-1$
			return numberFormat.format(0);
		}

		return value;
	}

	public static Number parse(String number) throws ParseException {
		if(StringUtils.isEmpty(number)) {
			return 0;
		}

		return numberFormat.parse(number);
	}
}