Class VariableOperators

java.lang.Object

org.springframework.data.mongodb.core.aggregation.VariableOperators

public class VariableOperators
extends Object

Gateway to variable aggregation operations.

Since:

1.10

Author:

Christoph Strobl, Mark Paluch

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	VariableOperators.Let	AggregationExpression for $let that binds AggregationExpression to variables for use in the specified in expression, and returns the result of the expression.
static class	VariableOperators.Map	AggregationExpression for $map.

Constructor Summary

Constructors

Constructor	Description
VariableOperators()

Method Summary

Modifier and Type	Method	Description
static VariableOperators.Let.LetBuilder	define(Collection<VariableOperators.Let.ExpressionVariable> variables)	Start creating new VariableOperators.Let that allows definition of VariableOperators.Let.ExpressionVariable that can be used within a nested AggregationExpression.
static VariableOperators.Let.LetBuilder	define(VariableOperators.Let.ExpressionVariable... variables)	Start creating new VariableOperators.Let that allows definition of VariableOperators.Let.ExpressionVariable that can be used within a nested AggregationExpression.
static VariableOperators.Map.AsBuilder	mapItemsOf(String fieldReference)	Starts building new VariableOperators.Map that applies an AggregationExpression to each item of a referenced array and returns an array with the applied results.
static VariableOperators.Map.AsBuilder	mapItemsOf(AggregationExpression expression)	Starts building new VariableOperators.Map that applies an AggregationExpression to each item of a referenced array and returns an array with the applied results.

Methods inherited from class Object

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

Constructor Details

VariableOperators

public VariableOperators()

Method Details

mapItemsOf

public static VariableOperators.Map.AsBuilder mapItemsOf(String fieldReference)

Starts building new VariableOperators.Map that applies an AggregationExpression to each item of a referenced array and returns an array with the applied results.

Parameters:

fieldReference - must not be null.

Returns:

mapItemsOf

public static VariableOperators.Map.AsBuilder mapItemsOf(AggregationExpression expression)

Starts building new VariableOperators.Map that applies an AggregationExpression to each item of a referenced array and returns an array with the applied results.

Parameters:

expression - must not be null.

Returns:

define

public static VariableOperators.Let.LetBuilder define(VariableOperators.Let.ExpressionVariable... variables)

Start creating new VariableOperators.Let that allows definition of VariableOperators.Let.ExpressionVariable that can be used within a nested AggregationExpression.

Parameters:

variables - must not be null.

Returns:

define

public static VariableOperators.Let.LetBuilder define(Collection<VariableOperators.Let.ExpressionVariable> variables)

Start creating new VariableOperators.Let that allows definition of VariableOperators.Let.ExpressionVariable that can be used within a nested AggregationExpression.

Parameters:

variables - must not be null.

Returns: