public void setParent ( ProjectCalendar calendar ) { // I've seen a malformed MSPDI file which sets the parent calendar to itself. // Silently ignore this here. if ( calendar != this ) { if ( getParent ( ) != null ) { getParent ( ) . removeDerivedCalendar ( this ) ; } super . setParent ( calendar ) ; if ( calendar != null ) { calendar . addDerivedCalendar ( this ) ; } clearWorkingDateCache ( ) ; } }
Sets the ProjectCalendar instance from which this calendar is derived .