Interface ParameterResolver
- All Superinterfaces:
Extension
- All Known Implementing Classes:
TypeBasedParameterResolver
ParameterResolver defines the API for Extensions
that wish to dynamically resolve arguments for parameters
at runtime.
If a constructor for a test class or a
@Test,
@BeforeEach,
@AfterEach,
@BeforeAll, or
@AfterAll method declares a parameter,
an argument for the parameter must be resolved at runtime by a
ParameterResolver.
Constructor Requirements
Consult the documentation in Extension for details on
constructor requirements.
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Method Summary
Modifier and TypeMethodDescriptionresolveParameter(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.
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Method Details
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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:
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resolveParameter
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:
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