com.inductiveautomation.ignition.gateway.auth.mapper.attr

Interface AttributeMapper<T>

Type Parameters:

T - the expected type of the mapped attribute

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface AttributeMapper<T>

An AttributeMapper maps / massages / transforms an attribute from an AttributeSource

Method Summary

Modifier and Type	Method and Description
java.util.Optional<T>	map(AttributeSource attributeSource) Map an attribute from the given AttributeSource

Method Detail

map

@Nonnull
java.util.Optional<T> map(@Nonnull
                                   AttributeSource attributeSource)
                            throws AttributeMapperException

Map an attribute from the given AttributeSource

Parameters:

attributeSource - the AttributeSource

Returns:

an Optional containing the mapped attribute or an empty Optional if the targeted attributed does not exist on the AttributeSource

Throws:

AttributeMapperException - if there is an unexpected problem mapping the attribute