Package org.picocontainer.containers

Class EmptyPicoContainer

java.lang.Object
org.picocontainer.containers.EmptyPicoContainer
All Implemented Interfaces:
Serializable, Converting, PicoContainer
public class EmptyPicoContainer extends Object implements PicoContainer, Converting, Serializable
Empty pico container serving as recoil damper in situations where you do not like to check whether container reference supplied to you is null or not
Author:
Konstantin Pribluda
See Also:

  • Constructor Details

    • EmptyPicoContainer

      public EmptyPicoContainer()

  • Method Details

    • getComponent

      public Object getComponent(Object componentKeyOrType)
      Description copied from interface: PicoContainer
      Retrieve a component instance registered with a specific key or type. If a component cannot be found in this container, the parent container (if one exists) will be searched.
      Specified by:
      getComponent in interface PicoContainer
      Parameters:
      componentKeyOrType - the key or Type that the component was registered with.
      Returns:
      an instantiated component, or null if no component has been registered for the specified key.

    • getComponent

      public Object getComponent(Object componentKeyOrType, Type into)
      Specified by:
      getComponent in interface PicoContainer

    • getComponent

      public <T> T getComponent(Class<T> componentType)
      Description copied from interface: PicoContainer
      Retrieve a component keyed by the component type.
      Specified by:
      getComponent in interface PicoContainer
      Parameters:
      componentType - the type of the component
      Returns:
      the typed resulting object instance or null if the object does not exist.

    • getComponent

      public <T> T getComponent(Class<T> componentType, Class<? extends Annotation> binding)
      Description copied from interface: PicoContainer
      Retrieve a component keyed by the component type and binding type.
      Specified by:
      getComponent in interface PicoContainer
      Parameters:
      componentType - the type of the component
      binding - the binding type of the component
      Returns:
      the typed resulting object instance or null if the object does not exist.

    • getComponents

      public List getComponents()
      Description copied from interface: PicoContainer
      Retrieve all the registered component instances in the container, (not including those in the parent container). The components are returned in their order of instantiation, which depends on the dependency order between them.
      Specified by:
      getComponents in interface PicoContainer
      Returns:
      all the components.

    • getParent

      public PicoContainer getParent()
      Description copied from interface: PicoContainer
      Retrieve the parent container of this container.
      Specified by:
      getParent in interface PicoContainer
      Returns:
      a PicoContainer instance, or null if this container does not have a parent.

    • getComponentAdapter

      public ComponentAdapter<?> getComponentAdapter(Object componentKey)
      Description copied from interface: PicoContainer
      Find a component adapter associated with the specified key. If a component adapter cannot be found in this container, the parent container (if one exists) will be searched.
      Specified by:
      getComponentAdapter in interface PicoContainer
      Parameters:
      componentKey - the key that the component was registered with.
      Returns:
      the component adapter associated with this key, or null if no component has been registered for the specified key.

    • getComponentAdapter

      public <T> ComponentAdapter<T> getComponentAdapter(Class<T> componentType, NameBinding componentNameBinding)
      Description copied from interface: PicoContainer
      Find a component adapter associated with the specified type and binding name. If a component adapter cannot be found in this container, the parent container (if one exists) will be searched.
      Specified by:
      getComponentAdapter in interface PicoContainer
      Parameters:
      componentType - the type of the component.
      componentNameBinding - the name binding to use
      Returns:
      the component adapter associated with this class, or null if no component has been registered for the specified key.

    • getComponentAdapter

      public <T> ComponentAdapter<T> getComponentAdapter(Class<T> componentType, Class<? extends Annotation> binding)
      Description copied from interface: PicoContainer
      Find a component adapter associated with the specified type and binding type. If a component adapter cannot be found in this container, the parent container (if one exists) will be searched.
      Specified by:
      getComponentAdapter in interface PicoContainer
      Parameters:
      componentType - the type of the component.
      binding - the typed binding to use
      Returns:
      the component adapter associated with this class, or null if no component has been registered for the specified key.

    • getComponentAdapters

      public Collection<ComponentAdapter<?>> getComponentAdapters()
      Description copied from interface: PicoContainer
      Retrieve all the component adapters inside this container. The component adapters from the parent container are not returned.
      Specified by:
      getComponentAdapters in interface PicoContainer
      Returns:
      a collection containing all the ComponentAdapters inside this container. The collection will not be modifiable.
      See Also:

    • getComponentAdapters

      public <T> List<ComponentAdapter<T>> getComponentAdapters(Class<T> componentType)
      Description copied from interface: PicoContainer
      Retrieve all component adapters inside this container that are associated with the specified type. The addComponent adapters from the parent container are not returned.
      Specified by:
      getComponentAdapters in interface PicoContainer
      Parameters:
      componentType - the type of the components.
      Returns:
      a collection containing all the ComponentAdapters inside this container that are associated with the specified type. Changes to this collection will not be reflected in the container itself.

    • getComponentAdapters

      public <T> List<ComponentAdapter<T>> getComponentAdapters(Class<T> componentType, Class<? extends Annotation> binding)
      Description copied from interface: PicoContainer
      Retrieve all component adapters inside this container that are associated with the specified type and binding type. The addComponent adapters from the parent container are not returned.
      Specified by:
      getComponentAdapters in interface PicoContainer
      Parameters:
      componentType - the type of the components.
      binding - the typed binding to use
      Returns:
      a collection containing all the ComponentAdapters inside this container that are associated with the specified type. Changes to this collection will not be reflected in the container itself.

    • accept

      public void accept(PicoVisitor visitor)
      we do not have anything to do here.
      Specified by:
      accept in interface PicoContainer
      Parameters:
      visitor - the visitor

    • getComponents

      public <T> List<T> getComponents(Class<T> componentType)
      Returns a List of components of a certain componentType. The list is ordered by instantiation order, starting with the components instantiated first at the beginning.
      Specified by:
      getComponents in interface PicoContainer
      Parameters:
      componentType - the searched type.
      Returns:
      a List of components.

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • getConverters

      public Converters getConverters()
      Description copied from interface: Converting
      Retrieve the set of converters for transforming string parameters into objects.
      Specified by:
      getConverters in interface Converting
      Returns:
      converter set instance.