org.springframework.data.mongodb.core

Interface ExecutableAggregationOperation

All Known Subinterfaces:

FluentMongoOperations, MongoOperations

All Known Implementing Classes:

MongoTemplate

public interface ExecutableAggregationOperation

ExecutableAggregationOperation allows creation and execution of 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:

Christoph Strobl, Mark Paluch

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ExecutableAggregationOperation.AggregationWithAggregation<T> Define the aggregation with pipeline stages.
static interface	ExecutableAggregationOperation.AggregationWithCollection<T> Collection override (Optional).
static interface	ExecutableAggregationOperation.ExecutableAggregation<T>
static interface	ExecutableAggregationOperation.TerminatingAggregation<T> Trigger execution by calling one of the terminating methods.

Method Summary

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

Method Detail

aggregateAndReturn

<T> ExecutableAggregationOperation.ExecutableAggregation<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 ExecutableAggregationOperation.ExecutableAggregation.

Throws:

IllegalArgumentException - if domainType is null.