
Understanding the Problem: Dealing with time zones and DST can be challenging due to the variability across regions. Our goal is to create a function that can accurately determine whether a given date and time fall within DST for a specific timezone.
The Solution Approach: We'll utilize Groovy's flexibility and simplicity to implement the DST check function. The function DSTTimeCheck takes an input date-time string and returns 'YES' if DST is in effect for the specified timezone (America/New_York in this example), otherwise 'NO'.
import java.text.SimpleDateFormat
import java.util.TimeZone
import java.util.Calendar
import java.util.Locale
// Function signature
def String DSTTimeCheck(String inputDateTimeString) {
// Define the date-time format
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.ENGLISH)
sdf.setTimeZone(TimeZone.getTimeZone('UTC')) // Set to UTC if the input is in UTC
// Parse the input date-time string
Date inputDate = sdf.parse(inputDateTimeString)
// Define the timezone for New York
TimeZone timeZone = TimeZone.getTimeZone('America/New_York')
Calendar calendar = Calendar.getInstance(timeZone)
calendar.setTime(inputDate)
// Check if daylight saving time is in effect for the input date-time
return timeZone.inDaylightTime(calendar.getTime()) ? 'YES' : 'NO'
}
Explanation:
Example:
Here's an example of how you can use the function for March 11th and March 9th in Eastern Standard Time (EST):
// Example usage of DSTTimeCheck function
def march11 = "2024-03-11T12:00:00" // March 11th, 2024 at 12:00:00 PM
def march09 = "2024-03-09T12:00:00" // March 9th, 2024 at 12:00:00 PM
// Call DSTTimeCheck function for March 11th and March 9th in EST
def resultMarch11 = DSTTimeCheck(march11)
def resultMarch09 = DSTTimeCheck(march09)
// Output the results
println "DST status for March 11th in EST: $resultMarch11"
println "DST status for March 9th in EST: $resultMarch09"
Output:
DST status for March 11th in EST: YES
DST status for March 9th in EST: NO
Conclusion: With Groovy's versatility, we've created a concise and efficient function for DST checks within SAP environments. This capability can significantly enhance time-related operations and ensure accurate handling of time zones in our applications.
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