Annotation of /src/main/java/eu/smartlm/abs/portal/data/aggregation/TimeCalculation.java

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1 :	dgarcia	1	package eu.smartlm.abs.portal.data.aggregation;
2 :
3 :			import java.util.Calendar;
4 :			import java.util.Date;
5 :
6 :			/**
7 :			* Performs different time calculations with the dates of the Usage Records
8 :			* @author David García Pérez - CESGA
9 :			*/
10 :			public class TimeCalculation {
11 :
12 :			/**
13 :			* This class performs a time difference between two formated dates, if the dates are wrongly formated, it returns -1
14 :			* @param formatedDate1 On of the dates to be used in the calculation
15 :			* @param formatedDate2 The other date to be used in the calculation
16 :			* @return returns the difference in miliseconds between formatedDate1 and formatedDate2, if they are wrongly formated it returns -1
17 :			*/
18 :			public static long timeDifferenceInMiliSeconds(Calendar calendar1, Calendar calendar2) {
19 :
20 :			Date date1 = calendar1.getTime();
21 :			Date date2 = calendar2.getTime();
22 :
23 :			//Calculating the difference
24 :			if(date1.after(date2))
25 :			return date1.getTime() - date2.getTime();
26 :			else
27 :			return date2.getTime() - date1.getTime();
28 :			}
29 :
30 :			/**
31 :			* This method performs the time difference between two UsageRecord dates in hours
32 :			* @param formatedDate1 formated usage record date to use in the calculation
33 :			* @param formatedDate2 formated usage record date to use in the calculation
34 :			* @return the difference in hours between formatedDate1 and formatedDate2, -1 if one or both dates are wrongly formatted
35 :			*/
36 :			public static double timeDifferenceInHours(Calendar date1, Calendar date2) {
37 :
38 :			long differenceInMiliSeconds = timeDifferenceInMiliSeconds(date1, date2);
39 :
40 :			if(differenceInMiliSeconds != -1)
41 :			return ((double) differenceInMiliSeconds) / (1000.0 * 60.0 * 60.0);
42 :			else
43 :			return -1.0;
44 :			}
45 :
46 :			}

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