Interface InjectionResolver<T>

Type Parameters:
T - This must be the class of the injection annotation that this resolver will handle
All Known Implementing Classes:
ChildInjectResolverImpl, ConfiguredByInjectionResolver, ThreeThirtyResolver

@Contract public interface InjectionResolver<T>
This class allows users to provide a custom injection target for any annotation (including @Inject). The user would usually only provide a resolver for @Inject if it were specializing the system provided resolver for @Inject. Otherwise, this resolver can be used to provide injection points for any annotation.

An implementation of InjectionResolver must be in the Singleton scope. Implementations of InjectionResolver will be instantiated as soon as they are added to HK2 in order to avoid deadlocks and circular references. Therefore it is recommended that implementations of InjectionResolver make liberal use of Provider or IterableProvider when injecting dependent services so that these services are not instantiated when the InjectionResolver is created

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    This is the name of the system provided resolver for 330 injections
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    This method should return true if the annotation that indicates that this is an injection point can appear in the parameter list of a constructor.
    boolean
    This method should return true if the annotation that indicates that this is an injection point can appear in the parameter list of a method.
    resolve(Injectee injectee, ServiceHandle<?> root)
    This method will return the object that should be injected into the given injection point.
  • Field Details

    • SYSTEM_RESOLVER_NAME

      static final String SYSTEM_RESOLVER_NAME
      This is the name of the system provided resolver for 330 injections
      See Also:
  • Method Details

    • resolve

      Object resolve(Injectee injectee, ServiceHandle<?> root)
      This method will return the object that should be injected into the given injection point. It is the responsiblity of the implementation to ensure that the object returned can be safely injected into the injection point.

      This method should not do the injection themselves

      Parameters:
      injectee - The injection point this value is being injected into
      root - The service handle of the root class being created, which should be used in order to ensure proper destruction of associated invalid input: '&'64;PerLookup scoped objects. This can be null in the case that this is being used for an object not managed by HK2. This will only happen if this object is being created with the create method of ServiceLocator.
      Returns:
      A possibly null value to be injected into the given injection point
    • isConstructorParameterIndicator

      boolean isConstructorParameterIndicator()
      This method should return true if the annotation that indicates that this is an injection point can appear in the parameter list of a constructor.
      Returns:
      true if the injection annotation can appear in the parameter list of a constructor
    • isMethodParameterIndicator

      boolean isMethodParameterIndicator()
      This method should return true if the annotation that indicates that this is an injection point can appear in the parameter list of a method.
      Returns:
      true if the injection annotation can appear in the parameter list of a method