if ( ( n_terminal == null ) || ( c_terminal == null ) ) {
throw new IllegalArgumentException( "attempt to create binary domain combination using null" );
}
- _id_0 = n_terminal.getId();
- _id_1 = c_terminal.getId();
+ //_id_0 = n_terminal.getId();
+ //_id_1 = c_terminal.getId();
+ _data = n_terminal.getId() + BinaryDomainCombination.SEPARATOR + c_terminal.getId();
}
public DirectedBinaryDomainCombination( final String n_terminal, final String c_terminal ) {