projector

Documentation

Overview

Package projector contains methods and mechanisms for creating and calling projectors.

Index

• func FromDef(definition *mappb.ProjectorDefinition, e mapping.Engine) types.Projector
• func FromFunction(fn interface{}, name string) (types.Projector, error)
• func IsZero(v reflect.Value) bool

Functions

func FromDef

func FromDef(definition *mappb.ProjectorDefinition, e mapping.Engine) types.Projector

FromDef creates a projector from a proto definition. This will not register it.

func FromFunction

func FromFunction(fn interface{}, name string) (types.Projector, error)

FromFunction creates a projector from a given function. The function must have a return type of (JSONObject, error) and all arguments must be assignable to JSONObject. This will not register the projector.

func IsZero

func IsZero(v reflect.Value) bool

IsZero reports whether v is the zero value for its type. It panics if the argument is invalid. This is to backfill for the lack of this method in older versions of Go.