org.springframework.data.mongodb.core

Interface ReactiveAggregationOperation

All Known Subinterfaces:

ReactiveFluentMongoOperations, ReactiveMongoOperations

All Known Implementing Classes:

ReactiveMongoTemplate

public interface ReactiveAggregationOperation

ReactiveAggregationOperation allows creation and execution of reactive MongoDB aggregation operations in a fluent API style.
The starting domainType is used for mapping the Aggregation provided via by into the MongoDB specific representation, as well as mapping back the resulting Document. An alternative input type for mapping the Aggregation can be provided by using TypedAggregation.

     
         aggregateAndReturn(Jedi.class)
             .by(newAggregation(Human.class, project("These are not the droids you are looking for")))
             .all();
     
 

Since:

2.0

Author:

Mark Paluch, Christoph Strobl

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ReactiveAggregationOperation.AggregationOperationWithAggregation<T> Define the aggregation with pipeline stages.
static interface	ReactiveAggregationOperation.AggregationOperationWithCollection<T> Collection override (optional).
static interface	ReactiveAggregationOperation.ReactiveAggregation<T>
static interface	ReactiveAggregationOperation.TerminatingAggregationOperation<T> Trigger execution by calling one of the terminating methods.

Method Summary

Modifier and Type	Method and Description
<T> ReactiveAggregationOperation.ReactiveAggregation<T>	aggregateAndReturn(Class<T> domainType) Start creating an aggregation operation that returns results mapped to the given domain type.

Method Detail

aggregateAndReturn

<T> ReactiveAggregationOperation.ReactiveAggregation<T> aggregateAndReturn(Class<T> domainType)

Start creating an aggregation operation that returns results mapped to the given domain type.
Use TypedAggregation to specify a potentially different input type for he aggregation.

Parameters:

domainType - must not be null.

Returns:

new instance of ReactiveAggregationOperation.ReactiveAggregation. Never null.

Throws:

IllegalArgumentException - if domainType is null.