package com.air.web.util;

import java.util.Date;

import com.air.util.VacDateUtil;

public final class VacHelper
{
	private VacHelper()
	{
	}
	private static class VacHelperHolder
	{
		static final VacHelper vacHelper = new VacHelper();
	}
	/**
	 * @return an instance of VacHelper
	 */
	public static VacHelper getInstance()
	{
		return VacHelperHolder.vacHelper;
	}
	public double getBalance( double entdays, double useddays, Date expiredate )
	{
		double douval = 0.0;
		if ( ( entdays - useddays ) > 0  )
		{
			if( expiredate != null )
			{
				if( VacDateUtil.getInstance().isAfterNow( expiredate ) )
				{
					douval = entdays - useddays;
				}
			}
			else
			{
				douval = entdays - useddays;
			}
		}
		return douval;
	}
	public double getBalancebyreqdate( double entdays, double useddays, Date expiredate, Date requestdate  )
	{
		double douval = 0.0;
		if ( ( entdays - useddays ) > 0  )
		{
			if( expiredate != null )
			{
				if( requestdate.before(expiredate))
				{
					douval = entdays - useddays;
				}
			}
			else
			{
				douval = entdays - useddays;
			}
		}
		return douval;
	}
}