Custom date field (Action Due date) needs to update the custom text field(Action due week)e.g. 16W07

[CHALLA SWAMY]

I am already having the same function with Fields Due date and Release Week

If I update due date with 2019-03-08 the Release Week updates as 1910:5

Same requirement I need with Custom date field (Action Due date) needs to update the custom text field(Action due week)e.g. 16W07

Here we are using the custom script:

import com.atlassian.jira.issue.CustomFieldManager;
import com.atlassian.jira.issue.fields.CustomField;
import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.issue.ModifiedValue;
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder;
import java.sql.Timestamp;
//import java.util.calendar.*;
//import java.text.SimpleDateFormat;
if(issue.getProjectObject() != null)
if(issue.getProjectObject().getId() != 11016)
{//Update ReleaseWeek with week Except for WH-PCR Project
Date date = issue.getDueDate();
String relYearWeek = "";
Calendar calUK = Calendar.getInstance(Locale.UK);
//Calendar calUS = Calendar.getInstance(Locale.US);
//if(date != null)
if(date)
{
calUK.setTime(date);
// calUS.setTime(date);

String dueDateYearUK = calUK.getWeekYear().toString().substring(2);
String dueDateWeekUK = calUK.get(Calendar.WEEK_OF_YEAR).toString();
String dueDateDayOfWeekUK = calUK.get(Calendar.DAY_OF_WEEK).toString();
String dayOfWeek = "";
if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.MONDAY)
dayOfWeek = ":1";
else if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.TUESDAY)
dayOfWeek = ":2";
else if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.WEDNESDAY)
dayOfWeek = ":3";
else if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.THURSDAY)
dayOfWeek = ":4";
else if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.FRIDAY)
dayOfWeek = ":5";
else if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY)
dayOfWeek = ":6";
else if(calUK.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY)
dayOfWeek = ":7";

//relYearWeek = calUK.getWeekYear().toString().substring(2) + dueDateWeekUK.padLeft(2, "0") + ":" +;
relYearWeek = dueDateYearUK + dueDateWeekUK.padLeft(2, "0") + dayOfWeek;//":" + dueDateDayOfWeekUK;

// String dueDateWeekUS = calUS.get(Calendar.WEEK_OF_YEAR).toString();
// String relYearWeekUS = calUS.getWeekYear().toString().substring(2) + dueDateWeekUS.padLeft(2, "0");
// return "EU:" + relYearWeek + ", US:" + relYearWeekUS;
// relYearWeek = "EU:" + relYearWeek + ", US:" + relYearWeekUS;
}
def cfManager = ComponentAccessor.getCustomFieldManager();
def relWeek = cfManager.getCustomFieldObjectByName("Release Week");
if(relYearWeek != "" || (relYearWeek == "" && issue.getCustomFieldValue(relWeek).toString() != ""))
relWeek.updateValue(null, issue, new ModifiedValue(issue.getCustomFieldValue(relWeek), relYearWeek), new DefaultIssueChangeHolder());
}

If I am replacing the Date date = issue.getDueDate(); with Action Due Date I am getting an error