// Initially set generateRow to true for each input row.
generateRow = true;

// Initially set isRoot to false for each input row.
isRoot = false;

// Check if input employee id and name is null.
if (isNull ("EMP_ID") || isNull ("EMP_NAME"))
{
    incrementErrorCount(1);
  
    // If input employee id and/or name is null, don't generate a output row for this
    // input row.
    generateRow = false;

} else {
  
    // Set the output field values.
    EMP_ID_OUT = EMP_ID;
    EMP_NAME_OUT = EMP_NAME;
}

if (isNull ("EMP_DESC"))
{
    setNull("EMP_DESC_OUT");
} else {
    EMP_DESC_OUT = EMP_DESC;
}

boolean isParentEmpIdNull = isNull("EMP_PARENT_EMPID");

if(isParentEmpIdNull)
{
    // This employee is the root for the hierarchy.
    isRoot = true;
    logInfo("This is the root for this hierarchy.");
    setNull("EMP_PARENT_EMPNAME");
}

synchronized(lock)

{
    // If the employee is not the root for this hierarchy, get the corresponding 
    // parent ID.
    if(!isParentEmpIdNull)
    EMP_PARENT_EMPNAME = (String) (empMap.get(new Integer (EMP_PARENT_EMPID)));
  
    // Add employee to the map for future reference.
    empMap.put (new Integer(EMP_ID), EMP_NAME);
}

// Generate row if generateRow is true.
if(generateRow)
    generateRow();