HasGroupFields (JPMML evaluator 1.7.3 API)

All Superinterfaces:

HasInputFields

All Known Implementing Classes:

AssociationModelEvaluator
```
public interface HasGroupFields
extends HasInputFields
```
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 = ...;
 Table table = ...;
 if(evaluator instanceof HasGroupFields){
   HasGroupFields hasGroupFields = (HasGroupFields)evaluator;
   table = EvaluatorUtil.groupRows(hasGroupFields, table);
 }
 
```
See Also:

EvaluatorUtil.groupRows(HasGroupFields, Table)

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  List<InputField> getGroupFields()
  Gets the group fields of a Model from its MiningSchema.
  - Methods inherited from interface org.jpmml.evaluator.HasInputFields
    getActiveFields, getInputFields, getResidualFields, getSupplementaryFields

- 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.