Package org.springframework.data.spel.spi

Interface EvaluationContextExtension

All Superinterfaces:

ExtensionIdAware

public interface EvaluationContextExtension
extends ExtensionIdAware

SPI to allow adding a set of properties and function definitions accessible via the root of an EvaluationContext provided by an ExtensionAwareQueryMethodEvaluationContextProvider.

Extensions can be ordered by following Spring's Ordered conventions.

Since:

1.9

Author:

Thomas Darimont, Oliver Gierke

See Also:

• Ordered
• Order

Method Summary

Modifier and Type	Method	Description
default Map<String,Function>	getFunctions()	Return the functions exposed by the extension.
default Map<String,Object>	getProperties()	Return the properties exposed by the extension.
default Object	getRootObject()	Return the root object to be exposed by the extension.

Methods inherited from interface org.springframework.data.spel.spi.ExtensionIdAware

getExtensionId

Method Details

getProperties

default Map<String,Object> getProperties()

Return the properties exposed by the extension.

Returns:

the properties

getFunctions

default Map<String,Function> getFunctions()

Return the functions exposed by the extension.

Returns:

the functions

getRootObject

@Nullable
default Object getRootObject()

Return the root object to be exposed by the extension. It's strongly recommended to declare the most concrete type possible as return type of the implementation method. This will allow us to obtain the necessary metadata once and not for every evaluation.

Returns:

the root object to be exposed by the extension.