Class ArrayOperators.Reduce

java.lang.Object

org.springframework.data.mongodb.core.aggregation.ArrayOperators.Reduce

All Implemented Interfaces:

AggregationExpression, MongoExpression

Enclosing class:

ArrayOperators

public static class ArrayOperators.Reduce
extends Object
implements AggregationExpression

AggregationExpression for $reduce.

Since:

1.0

Author:

Christoph Strobl

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ArrayOperators.Reduce.InitialValueBuilder
static class	ArrayOperators.Reduce.PropertyExpression
static interface	ArrayOperators.Reduce.ReduceBuilder
static enum	ArrayOperators.Reduce.Variable

Method Summary

Modifier and Type	Method	Description
static ArrayOperators.Reduce.InitialValueBuilder	arrayOf(String fieldReference)	Start creating new ArrayOperators.Reduce.
static ArrayOperators.Reduce.InitialValueBuilder	arrayOf(AggregationExpression arrayValueExpression)	Start creating new ArrayOperators.Reduce.
org.bson.Document	toDocument(AggregationOperationContext context)	Turns the AggregationExpression into a Document within the given AggregationOperationContext.

Methods inherited from class Object

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

Methods inherited from interface AggregationExpression

toDocument

Method Details

toDocument

public org.bson.Document toDocument(AggregationOperationContext context)

Description copied from interface: AggregationExpression

Turns the AggregationExpression into a Document within the given AggregationOperationContext.

Specified by:

toDocument in interface AggregationExpression

Parameters:

context - must not be null.

Returns:

the MongoDB native (Document) form of the expression.

arrayOf

public static ArrayOperators.Reduce.InitialValueBuilder arrayOf(String fieldReference)

Start creating new ArrayOperators.Reduce.

Parameters:

fieldReference - must not be null.

Returns:

new instance of ArrayOperators.Reduce.InitialValueBuilder to create ArrayOperators.Reduce.

arrayOf

public static ArrayOperators.Reduce.InitialValueBuilder arrayOf(AggregationExpression arrayValueExpression)

Start creating new ArrayOperators.Reduce.

Parameters:

arrayValueExpression - must not be null.

Returns:

new instance of ArrayOperators.Reduce.InitialValueBuilder to create ArrayOperators.Reduce.