User Defined Java Class
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User Defined Java Class
This Java code is part of a class or method that processes rows of data.
Let's break it down:
Import Statements:
import java.util.*;These statements import the java.util package, which includes various utility classes like Calendar.
Private Fields:
private int yearIndex;
private Calendar calendar;These are private instance fields of the class. yearIndex is an integer, and calendar is an instance of the Calendar class.
processRow Method: This method is used to process rows of data. It takes two parameters, StepMetaInterface smi and StepDataInterface sdi, and it may throw a KettleException.
It checks if there is a row available for processing using getRow(). If there is no row, it marks the output as done and returns false.
The if (first) block initializes some variables the first time this method is called. It finds the index of a field named "YEAR" in the input data, creates a Calendar instance, and clears it.
It resizes the outputRowData array to match the output row's metadata size.
It extracts the year value from the input row using getInteger and calculates the Easter date using the easterDate method.
It adds the Easter date to the output row data and puts it into the output stream using putRow.
easterDate Method: This method calculates the date of Easter for a given year using the algorithm to determine the date of Easter Sunday.
It takes the year as a parameter.
It performs several mathematical calculations to determine the day, month, and year of Easter based on the input year.
Finally, it sets the calculated date in the calendar instance and returns the Date object representing the Easter date.
Overall, this code is part of a data processing routine, and the easterDate method calculates the date of Easter for a given year using a well-known algorithm for determining Easter's date.
