org.apache.cayenne.di.spi

## Class DefaultInjector

- java.lang.Object
- - org.apache.cayenne.di.spi.DefaultInjector

- All Implemented Interfaces:
    Injector

      public class DefaultInjector
      extends Object
      implements Injector

  A default Cayenne implementations of a DI injector.
  Since:
    3.1

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `DefaultInjector(Module... modules)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `<T> T` | `getInstance(Class<T> type)` Returns a service instance bound in the container for a specific type.
    `<T> T` | `getInstance(Key<T> key)` Returns a service instance bound in the container for a specific binding key.
    `<T> Provider<T>` | `getProvider(Class<T> type)`
    `<T> Provider<T>` | `getProvider(Key<T> key)`
    `void` | `injectMembers(Object object)` Performs field injection on a given object, ignoring constructor injection.
    `void` | `shutdown()` A lifecycle method that let's the injector's services to clean up their state and release resources.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### DefaultInjector

          public DefaultInjector(Module... modules)
                          throws DIRuntimeException

      Throws:
        `DIRuntimeException`

  - ### Method Detail

    - #### getInstance

          public <T> T getInstance(Class<T> type)
                            throws DIRuntimeException

      Description copied from interface: `Injector`
      Returns a service instance bound in the container for a specific type. Throws `DIRuntimeException` if the type is not bound, or an instance can not be created.
      Specified by:
        `getInstance` in interface `Injector`
      Throws:
        `DIRuntimeException`

    - #### getInstance

          public <T> T getInstance(Key<T> key)
                            throws DIRuntimeException

      Description copied from interface: `Injector`
      Returns a service instance bound in the container for a specific binding key. Throws `DIRuntimeException` if the key is not bound, or an instance can not be created.
      Specified by:
        `getInstance` in interface `Injector`
      Throws:
        `DIRuntimeException`

    - #### getProvider

          public <T> Provider<T> getProvider(Class<T> type)
                                      throws DIRuntimeException

      Specified by:
        `getProvider` in interface `Injector`
      Throws:
        `DIRuntimeException`

    - #### getProvider

          public <T> Provider<T> getProvider(Key<T> key)
                                      throws DIRuntimeException

      Specified by:
        `getProvider` in interface `Injector`
      Throws:
        `DIRuntimeException`

    - #### injectMembers

          public void injectMembers(Object object)

      Description copied from interface: `Injector`
      Performs field injection on a given object, ignoring constructor injection. Since Cayenne DI injector returns fully injected objects, this method is rarely used directly.

      Note that using this method inside a custom DI `Provider` will most likely result in double injection, as custom provider is wrapped in a field-injecting provider by the DI container. Instead custom providers must initialize object properties manually, obtaining dependencies from Injector.

      Specified by:
        `injectMembers` in interface `Injector`

    - #### shutdown

          public void shutdown()

      Description copied from interface: `Injector`
      A lifecycle method that let's the injector's services to clean up their state and release resources. This method would normally generate a scope end event for the injector's one and only singleton scope.
      Specified by:
        `shutdown` in interface `Injector`

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