org.junit.jupiter.api.extension.support

Class TypeBasedParameterResolver<T>

java.lang.Object

org.junit.jupiter.api.extension.support.TypeBasedParameterResolver<T>

Type Parameters:

T - the type of the parameter supported by this ParameterResolver

All Implemented Interfaces:

Extension, ParameterResolver

@API(status=EXPERIMENTAL,
     since="5.6")
public abstract class TypeBasedParameterResolver<T>
extends java.lang.Object
implements ParameterResolver

ParameterResolver adapter which resolves a parameter based on its exact type.

Since:

5.6

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.reflect.Type	supportedParameterType

Constructor Summary

Constructors

Constructor and Description
TypeBasedParameterResolver()

Method Summary

Modifier and Type	Method and Description
private java.lang.reflect.Type	enclosedTypeOfParameterResolver()
private java.lang.reflect.ParameterizedType	findTypeBasedParameterResolverSuperclass(java.lang.Class<?> clazz)
private java.lang.reflect.Type	getParameterType(ParameterContext parameterContext)
abstract T	resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) Resolve an argument for the Parameter in the supplied ParameterContext for the supplied ExtensionContext.
boolean	supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) Determine if this resolver supports resolution of an argument for the Parameter in the supplied ParameterContext for the supplied ExtensionContext.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

supportedParameterType

private final java.lang.reflect.Type supportedParameterType

Constructor Detail

TypeBasedParameterResolver

public TypeBasedParameterResolver()

Method Detail

supportsParameter

public final boolean supportsParameter(ParameterContext parameterContext,
                                       ExtensionContext extensionContext)

Description copied from interface: ParameterResolver

Determine if this resolver supports resolution of an argument for the Parameter in the supplied ParameterContext for the supplied ExtensionContext.

The Method or Constructor in which the parameter is declared can be retrieved via ParameterContext.getDeclaringExecutable().

Specified by:

supportsParameter in interface ParameterResolver

Parameters:

parameterContext - the context for the parameter for which an argument should be resolved; never null

extensionContext - the extension context for the Executable about to be invoked; never null

Returns:

true if this resolver can resolve an argument for the parameter

See Also:

ParameterResolver.resolveParameter(org.junit.jupiter.api.extension.ParameterContext, org.junit.jupiter.api.extension.ExtensionContext), ParameterContext

resolveParameter

public abstract T resolveParameter(ParameterContext parameterContext,
                                   ExtensionContext extensionContext)
                            throws ParameterResolutionException

Description copied from interface: ParameterResolver

Resolve an argument for the Parameter in the supplied ParameterContext for the supplied ExtensionContext.

This method is only called by the framework if ParameterResolver.supportsParameter(org.junit.jupiter.api.extension.ParameterContext, org.junit.jupiter.api.extension.ExtensionContext) previously returned true for the same ParameterContext and ExtensionContext.

The Method or Constructor in which the parameter is declared can be retrieved via ParameterContext.getDeclaringExecutable().

Specified by:

resolveParameter in interface ParameterResolver

Parameters:

parameterContext - the context for the parameter for which an argument should be resolved; never null

extensionContext - the extension context for the Executable about to be invoked; never null

Returns:

the resolved argument for the parameter; may only be null if the parameter type is not a primitive

Throws:

ParameterResolutionException

See Also:

ParameterResolver.supportsParameter(org.junit.jupiter.api.extension.ParameterContext, org.junit.jupiter.api.extension.ExtensionContext), ParameterContext

getParameterType

private java.lang.reflect.Type getParameterType(ParameterContext parameterContext)

enclosedTypeOfParameterResolver

private java.lang.reflect.Type enclosedTypeOfParameterResolver()

findTypeBasedParameterResolverSuperclass

private java.lang.reflect.ParameterizedType findTypeBasedParameterResolverSuperclass(java.lang.Class<?> clazz)