org.apache.nifi.parameter

Interface ParameterLookup

public interface ParameterLookup

Field Summary

Fields

Modifier and Type	Field and Description
static ParameterLookup	EMPTY

Method Summary

Modifier and Type	Method and Description
Optional<Parameter>	getParameter(String parameterName) Returns the Parameter with the given name, considering the base and all inherited ParameterContexts.
long	getVersion() Indicates the current Version of the Parameter Context.
boolean	isEmpty() Returns false if any Parameters are available, true if no Parameters have been defined in this or any inherited ParameterContexts.

Field Detail

EMPTY

static final ParameterLookup EMPTY

Method Detail

getParameter

Optional<Parameter> getParameter(String parameterName)

Returns the Parameter with the given name, considering the base and all inherited ParameterContexts.

Parameters:

parameterName - the name of the Parameter

Returns:

the Parameter with the given name or an empty Optional if no Parameter exists with that name

isEmpty

boolean isEmpty()

Returns false if any Parameters are available, true if no Parameters have been defined in this or any inherited ParameterContexts.

Returns:

true if empty

getVersion

long getVersion()

Indicates the current Version of the Parameter Context. Each time that the Parameter Context is updated, its version is incremented. This allows other components to know whether or not the values have changed since some other point in time. The version may or may not be persisted across restarts of the application.

Returns:

the current version