public void invalidateAll(){
  if (m_tuples == null)   return;
  for (int i=0; i < m_tuples.length; ++i)   invalidate(i);
}

public void invalidateAll ( ) { if ( m_tuples == null ) return ; for ( int i = 0 ; i < m_tuples . length ; ++ i ) invalidate ( i ) ; }
invalidate all tuples managed by this tuplemanager
