Interface ParameterResolver
-
- All Superinterfaces:
Extension
- All Known Implementing Classes:
TypeBasedParameterResolver
@API(status=STABLE, since="5.0") public interface ParameterResolver extends ExtensionParameterResolverdefines the API forExtensionsthat wish to dynamically resolve arguments for parameters at runtime.If a constructor for a test class or a
@Test,@BeforeEach,@AfterEach,@BeforeAll, or@AfterAllmethod declares a parameter, an argument for the parameter must be resolved at runtime by aParameterResolver.Constructor Requirements
Consult the documentation in
Extensionfor details on constructor requirements.
-
-
Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description java.lang.ObjectresolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext)Resolve an argument for theParameterin the suppliedParameterContextfor the suppliedExtensionContext.booleansupportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext)Determine if this resolver supports resolution of an argument for theParameterin the suppliedParameterContextfor the suppliedExtensionContext.
-
-
-
Method Detail
-
supportsParameter
boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException
Determine if this resolver supports resolution of an argument for theParameterin the suppliedParameterContextfor the suppliedExtensionContext.The
MethodorConstructorin which the parameter is declared can be retrieved viaParameterContext.getDeclaringExecutable().- Parameters:
parameterContext- the context for the parameter for which an argument should be resolved; nevernullextensionContext- the extension context for theExecutableabout to be invoked; nevernull- Returns:
trueif this resolver can resolve an argument for the parameter- Throws:
ParameterResolutionException- See Also:
resolveParameter(org.junit.jupiter.api.extension.ParameterContext, org.junit.jupiter.api.extension.ExtensionContext),ParameterContext
-
resolveParameter
java.lang.Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException
Resolve an argument for theParameterin the suppliedParameterContextfor the suppliedExtensionContext.This method is only called by the framework if
supportsParameter(org.junit.jupiter.api.extension.ParameterContext, org.junit.jupiter.api.extension.ExtensionContext)previously returnedtruefor the sameParameterContextandExtensionContext.The
MethodorConstructorin which the parameter is declared can be retrieved viaParameterContext.getDeclaringExecutable().- Parameters:
parameterContext- the context for the parameter for which an argument should be resolved; nevernullextensionContext- the extension context for theExecutableabout to be invoked; nevernull- Returns:
- the resolved argument for the parameter; may only be
nullif the parameter type is not a primitive - Throws:
ParameterResolutionException- See Also:
supportsParameter(org.junit.jupiter.api.extension.ParameterContext, org.junit.jupiter.api.extension.ExtensionContext),ParameterContext
-
-