package routines;
import java.text.SimpleDateFormat;
import java.util.Date;
/*
 * getDateFromEpoch: return yyyyMMdd from timestamp epoch
 * 
 * 
 * {talendTypes} Long
 * 
 * {Category} User Defined
 * 
 * {param} Long(Long) input: The timestamp to convert
 * 
 * {example} getDateFromEpoch(epoch)
 */
public class JavaDateEpoch {
	/**
     * get part of date. like YEAR, MONTH, HOUR, or DAY_OF_WEEK, WEEK_OF_MONTH, WEEK_OF_YEAR, TIMEZONE and so on
     *
     * @param partName which part to get.
     * @param date the date value.
     * @return the specified part value.
     *
     * {talendTypes} Long
	 * 
	 * {Category} User Defined
	 * 
	 * {param} Long(Long) input: The timestamp to convert
	 * 
	 * {example} getDateFromEpoch(epoch)
     *
     */
    public static Long getDateFromEpoch(Long timeAsLong){
    	Long returnVal = null;
    	
    	if(timeAsLong!=null){
        	SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        	String v = sdf.format(new Date(timeAsLong)); 
        	returnVal = Long.parseLong(v);
        }
    	return returnVal;
    }
}