org.jpmml.evaluator

Interface HasGroupFields

All Superinterfaces:

HasActiveFields

All Known Implementing Classes:

AssociationModelEvaluator

public interface HasGroupFields
extends HasActiveFields

A marker interface for models that expect the application to group many scalar-valued data records to a single collection-valued data record. The grouping is applied to active field values.

Aggregating data records:

 Evaluator evaluator = ...;
 List<? extends Map<FieldName, ?>> preparedRecords = ...;
 if(evaluator instanceof HasGroupFields){
   HasGroupFields hasGroupFields = (HasGroupFields)evaluator;
   preparedRecords = EvaluatorUtil.groupRows(hasGroupFields, preparedRecords);
 }
 

See Also:

EvaluatorUtil.groupRows(HasGroupFields, List)

Method Summary

Methods

Modifier and Type	Method and Description
List<InputField>	getGroupFields() Gets the group fields of a Model from its MiningSchema.

Methods inherited from interface org.jpmml.evaluator.HasActiveFields

getActiveFields

Method Detail

getGroupFields

List<InputField> getGroupFields()

Gets the group fields of a Model from its MiningSchema.

This field set is relevant for association rules model type only.