MongoDB request DSL • opensavvy.ktmongo.dsl.aggregation.accumulators • ValueAccumulators

ValueAccumulators

interface ValueAccumulators<From : Any, Into : Any> : ValueOperators, CompoundBsonNode

Supertype for all interface operators describing accumulation operators.

To register a custom accumulator, use accept.

Most of the time, end-users will be using the subtype AccumulationOperators instead of this interface.

Because accumulation operators are valued from aggregation operators, this interface extends ValueOperators.

Inheritors

• AccumulationOperators
• ArithmeticValueAccumulators

Properties

context

abstract val context: 

field

open val <Root, Type> KProperty1<Root, Type>.field: Field<Root, Type>

Converts a Kotlin property into a Field.

Functions

accept

abstract override fun accept(node: BsonNode)

Adds a new node as a child of this one.

acceptAll

fun <N : Node> CompoundNode<N>.acceptAll(nodes: Iterable<N>)

Adds any number of nodes into this one.

div

open operator fun <Context : Any, Root, Child> Value<Context, Root>.div(field: KProperty1<Root, Child>): Value<Context, Child>

Refers to field as a nested field of the current value.

open operator fun <Context : Any, Root, Child> Value<Context, Root>.div(field: Field<Root, Child>): Value<Context, Child>

Refers to field as a nested field of the current value.

open operator fun <Root, Parent, Child> KProperty1<Root, Parent>.div(child: KProperty1<Parent & Any, Child>): Field<Root, Child>

Refers to child as a nested field of the current field.

freeze

abstract override fun freeze()

Makes this expression immutable.

get

open operator fun <Root, Type> KProperty1<Root, Collection<Type>>.get(index: Int): Field<Root, Type>

Refers to a specific item in an array, by its index.

open operator fun <Root, Type> KProperty1<Root, Map<String, Type>>.get(index: String): Field<Root, Type>

Refers to a specific item in a map, by its name.

of

open fun <Result> of(value: Result): Value<Any, Result>

Refers to a Kotlin value within an aggregation value.

open fun of(value: ): Value<Any, >

Refers to a BsonType within an aggregation value.

open fun <Context : Any, Result> of(field: KProperty1<Context, Result>): Value<Context, Result>

Refers to a field within an aggregation value.

open fun <Context : Any, Result> of(field: Field<Context, Result>): Value<Context, Result>

Refers to a field within an aggregation value.

simplify

abstract fun simplify(): BsonNode?

Returns a simplified (but equivalent) expression to the current expression.

toBson

open fun toBson(): 

Writes the result of simplifying to a new Bson.

unsafe

open infix fun <Root, Child> KProperty1<Root, *>.unsafe(child: String): Field<Root, Child>

Refers to a field child of the current field, with no compile-time safety.

open infix fun <Root, Child> KProperty1<Root, *>.unsafe(child: KProperty1<*, Child>): Field<Root, Child>

Refers to a field child of the current field, without checking that it is a field available on the current object.

open infix fun <Root, Child> KProperty1<Root, *>.unsafe(child: Field<*, Child>): Field<Root, Child>

Refers to a field child of the current field, without checking that it is a field available on the current object.

open infix fun <Root, Child> Field<Root, *>.unsafe(child: KProperty1<*, Child>): Field<Root, Child>

Refers to a field child of the current field, without checking that it is a field available on the current object.

open infix fun <Root, Child> Field<Root, *>.unsafe(child: Field<*, Child>): Field<Root, Child>

Refers to a field child of the current field, without checking that it is a field available on the current object.

writeTo

abstract fun writeTo(writer: )

Writes the result of simplifying this expression into writer.