org.springframework.data.mongodb.core.aggregation
Class ExposedFieldsAggregationOperationContext

java.lang.Object
  org.springframework.data.mongodb.core.aggregation.ExposedFieldsAggregationOperationContext

All Implemented Interfaces:

AggregationOperationContext

Direct Known Subclasses:

GroupOperation, ProjectionOperation, UnwindOperation

public abstract class ExposedFieldsAggregationOperationContext
extends Object
implements AggregationOperationContext

Support class to implement AggregationOperations that will become an AggregationOperationContext as well defining ExposedFields.

Since:

1.3

Author:

Oliver Gierke

Constructor Summary

ExposedFieldsAggregationOperationContext()

Method Summary

protected abstract ExposedFields	getFields()
com.mongodb.DBObject	getMappedObject(com.mongodb.DBObject dbObject) Returns the mapped DBObject, potentially converting the source considering mapping metadata etc.
org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference	getReference(Field field) Returns a ExposedFields.FieldReference for the given field or null if the context does not expose the given field.
org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference	getReference(String name) Returns the ExposedFields.FieldReference for the field with the given name or null if the context does not expose a field with the given name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExposedFieldsAggregationOperationContext

public ExposedFieldsAggregationOperationContext()

Method Detail

getMappedObject

public com.mongodb.DBObject getMappedObject(com.mongodb.DBObject dbObject)

Description copied from interface: AggregationOperationContext

Returns the mapped DBObject, potentially converting the source considering mapping metadata etc.

Specified by:

getMappedObject in interface AggregationOperationContext

Parameters:

dbObject - will never be null.

Returns:

must not be null.

getReference

public org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference getReference(Field field)

Description copied from interface: AggregationOperationContext

Returns a ExposedFields.FieldReference for the given field or null if the context does not expose the given field.

Specified by:

getReference in interface AggregationOperationContext

Parameters:

field - must not be null.

Returns:

getReference

public org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference getReference(String name)

Description copied from interface: AggregationOperationContext

Returns the ExposedFields.FieldReference for the field with the given name or null if the context does not expose a field with the given name.

Specified by:

getReference in interface AggregationOperationContext

Parameters:

name - must not be null or empty.

Returns:

getFields

protected abstract ExposedFields getFields()