Functions Editor

Use the Functions Editor to develop Java methods that can be called from rule actions and conditions.

Each function contains the same fields:

Function Name—A name for the function.

Description—A brief description of the function.

Implementation—Either Java or Groovy.

Example

This function is used to compare dates. It would be configured as follows:

Name: compareDates
Description: This function is required to compare dates.
Implementation: 
import java.util.Date;
import java.text.SimpleDateFormat;

function int _GRS_compareDate(String a, String b) {
            // Compare two dates and returns:
            // -99 : invalid/bogus input
            //  -1 : if a < b
            //   0 : if a = b
            //   1 : if a > b
            
            SimpleDateFormat dtFormat = new SimpleDateFormat(“dd-MMM-yyyy”);
            try {
                  Date dt1= dtFormat.parse(a);
                  Date dt2= dtFormat.parse(b);
                  return dt1.compareTo(dt2);
            } catch (Exception e) {
                  return -99;
            }
      }

For user-supplied classes, the .jar file must be in the CLASSPATH for both GRAT and the GRE.