org.springframework.data.mongodb.core.aggregation

Class BucketOperationSupport.OperationOutput

java.lang.Object

org.springframework.data.mongodb.core.aggregation.BucketOperationSupport.Output

org.springframework.data.mongodb.core.aggregation.BucketOperationSupport.OperationOutput

All Implemented Interfaces:

AggregationExpression

Enclosing class:

BucketOperationSupport<T extends BucketOperationSupport<T,B>,B extends BucketOperationSupport.OutputBuilder<B,T>>

protected static class BucketOperationSupport.OperationOutput
extends BucketOperationSupport.Output

Output field that uses a Mongo operation (expression object) to generate an output field value.
BucketOperationSupport.OperationOutput is used either with a regular field name or an operation keyword (e.g. $sum, $count).

Author:

Mark Paluch

Constructor Summary

Constructors

Constructor and Description
OperationOutput(String operation, Collection<? extends Object> values) Creates a new BucketOperationSupport.Output for the given field.

Method Summary

Modifier and Type	Method and Description
protected Field	getField() Returns the field that holds the ProjectionOperationBuilder.OperationProjection.
protected List<Object>	getOperationArguments(AggregationOperationContext context)
com.mongodb.DBObject	toDbObject(AggregationOperationContext context) Turns the AggregationExpression into a DBObject within the given AggregationOperationContext.
BucketOperationSupport.OperationOutput	withAlias(String alias) Creates a new instance of this BucketOperationSupport.OperationOutput with the given alias.

Methods inherited from class org.springframework.data.mongodb.core.aggregation.BucketOperationSupport.Output

getExposedField

Methods inherited from class java.lang.Object

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

Constructor Detail

OperationOutput

public OperationOutput(String operation,
                       Collection<? extends Object> values)

Creates a new BucketOperationSupport.Output for the given field.

Parameters:

operation - the actual operation key, must not be null or empty.

values - the values to pass into the operation, must not be null.

Method Detail

toDbObject

public com.mongodb.DBObject toDbObject(AggregationOperationContext context)

Description copied from interface: AggregationExpression

Turns the AggregationExpression into a DBObject within the given AggregationOperationContext.

Returns:

getOperationArguments

protected List<Object> getOperationArguments(AggregationOperationContext context)

getField

protected Field getField()

Returns the field that holds the ProjectionOperationBuilder.OperationProjection.

Returns:

withAlias

public BucketOperationSupport.OperationOutput withAlias(String alias)

Creates a new instance of this BucketOperationSupport.OperationOutput with the given alias.

Parameters:

alias - the alias to set

Returns: