Interface FieldsExposingAggregationOperation

All Superinterfaces:

AggregationOperation

All Known Subinterfaces:

FieldsExposingAggregationOperation.InheritsFieldsAggregationOperation

All Known Implementing Classes:

AddFieldsOperation, BucketAutoOperation, BucketOperation, BucketOperationSupport, CountOperation, FacetOperation, GraphLookupOperation, GroupOperation, LookupOperation, MergeOperation, ProjectionOperation, ReplaceRootOperation, ReplaceRootOperation.ReplaceRootDocumentOperation, ReplaceWithOperation, SetOperation, SetWindowFieldsOperation, UnsetOperation, UnwindOperation

public interface FieldsExposingAggregationOperation
extends AggregationOperation

AggregationOperation that exposes ExposedFields that can be used for later aggregation pipeline AggregationOperations. A FieldsExposingAggregationOperation implementing the FieldsExposingAggregationOperation.InheritsFieldsAggregationOperation will expose fields from its parent operations. Not implementing FieldsExposingAggregationOperation.InheritsFieldsAggregationOperation will replace existing exposed fields.

Author:

Thomas Darimont, Mark Paluch

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	FieldsExposingAggregationOperation.InheritsFieldsAggregationOperation	Marker interface for AggregationOperation that inherits fields from previous operations.

Method Summary

Modifier and Type	Method	Description
ExposedFields	getFields()	Returns the fields exposed by the AggregationOperation.
default boolean	inheritsFields()

Methods inherited from interface AggregationOperation

getOperator, toDocument, toPipelineStages

Method Details

getFields

ExposedFields getFields()

Returns the fields exposed by the AggregationOperation.

Returns:

will never be null.

inheritsFields

default boolean inheritsFields()

Returns:

true to conditionally inherit fields from previous operations.

Since:

2.0.6