Package org.exoplatform.container.spi

Interface ComponentAdapter<T>

All Superinterfaces:
ComponentAdapter<T>
All Known Implementing Classes:
AbstractComponentAdapter, InstanceComponentAdapter, ManageableComponentAdapter, MX4JComponentAdapter
public interface ComponentAdapter<T> extends ComponentAdapter<T>
A component adapter is responsible for providing a specific component instance. An instance of an implementation of this interface is used inside a Container for every registered component or instance. Each ComponentAdapter instance has to have a key which is unique within that container. The key itself is either a class type (normally an interface) or an identifier.
Version:
$Id$
Author:
Nicolas Filotto

  • Method Details

    • getComponentKey

      Object getComponentKey()
      Retrieve the key associated with the component.
      Specified by:
      getComponentKey in interface ComponentAdapter<T>
      Returns:
      the component's key. Should either be a class type (normally an interface) or an identifier that is unique (within the scope of the current Container).

    • getComponentImplementation

      Class<? extends T> getComponentImplementation()
      Retrieve the class of the component.
      Specified by:
      getComponentImplementation in interface ComponentAdapter<T>
      Returns:
      the component's implementation class. Should normally be a concrete class (ie, a class that can be instantiated).

    • getComponentInstance

      T getComponentInstance() throws ContainerException
      Retrieve the component instance. This method will usually create a new instance each time it is called, but that is not required.
      Returns:
      the component instance.
      Throws:
      ContainerException - if the component could not be instantiated. Or if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambiguous situation within the container.

    • isSingleton

      boolean isSingleton()
      Indicates whether or not this adapter is a singleton