boolean visitScalarParameter( ScalarParameterHandle param, HashMap values )
boolean visitScalarParameter( ScalarParameterHandle param )
			boolean visitScalarParameter( ScalarParameterHandle param,					HashMap values )			{				String name = param.getName( );				String expr = param.getDefaultValue( );				String type = param.getDataType( );				Object value = evaluate( expr, type );				values.put( name, value );				return true;			}