Package org.picocontainer.behaviors

Class AbstractBehavior<T>

java.lang.Object
org.picocontainer.behaviors.AbstractBehavior<T>
All Implemented Interfaces:
Serializable, Behavior<T>, ComponentAdapter<T>, ComponentLifecycle<T>, ComponentMonitorStrategy, LifecycleStrategy
Direct Known Subclasses:
Automated, Decorated, FieldDecorated, Guarded, HiddenImplementation, Locked, PropertyApplicator, Stored, Synchronized
public abstract class AbstractBehavior<T> extends Object implements Behavior<T>, ComponentMonitorStrategy, LifecycleStrategy, Serializable

Component adapter which decorates another adapter.

This adapter supports a component monitor strategy and will propagate change of monitor to the delegate if the delegate itself support the monitor strategy.

This adapter also supports a lifecycle manager and a lifecycle strategy if the delegate does.

Author:
Jon Tirsen, Aslak Hellesoy, Mauro Talevi
See Also:

  • Field Details

  • Constructor Details

  • Method Details

    • getComponentKey

      public Object getComponentKey()
      Description copied from interface: ComponentAdapter
      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 PicoContainer).

    • getComponentImplementation

      public Class<? extends T> getComponentImplementation()
      Description copied from interface: ComponentAdapter
      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

      public T getComponentInstance(PicoContainer container) throws PicoCompositionException
      Description copied from interface: ComponentAdapter
      Retrieve the component instance. This method will usually create a new instance each time it is called, but that is not required. For example, Cached will always return the same instance.
      Specified by:
      getComponentInstance in interface ComponentAdapter<T>
      Parameters:
      container - the PicoContainer, that is used to resolve any possible dependencies of the instance.
      Returns:
      the component instance.
      Throws:
      PicoCompositionException - if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambigous situation within the container.

    • getComponentInstance

      public T getComponentInstance(PicoContainer container, Type into) throws PicoCompositionException
      Description copied from interface: ComponentAdapter
      Retrieve the component instance. This method will usually create a new instance each time it is called, but that is not required. For example, Cached will always return the same instance.
      Specified by:
      getComponentInstance in interface ComponentAdapter<T>
      Parameters:
      container - the PicoContainer, that is used to resolve any possible dependencies of the instance.
      into - the class that is about to be injected into. Use ComponentAdapter.NOTHING.class if this is not important to you.
      Returns:
      the component instance.
      Throws:
      PicoCompositionException - if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambiguous situation within the container.

    • verify

      public void verify(PicoContainer container) throws PicoCompositionException
      Description copied from interface: ComponentAdapter
      Verify that all dependencies for this adapter can be satisfied. Normally, the adapter should verify this by checking that the associated PicoContainer contains all the needed dependencies.
      Specified by:
      verify in interface ComponentAdapter<T>
      Parameters:
      container - the PicoContainer, that is used to resolve any possible dependencies of the instance.
      Throws:
      PicoCompositionException - if one or more dependencies cannot be resolved.

    • getDelegate

      public final ComponentAdapter<T> getDelegate()
      Description copied from interface: ComponentAdapter
      Component adapters may be nested in a chain, and this method is used to grab the next ComponentAdapter in the chain.
      Specified by:
      getDelegate in interface ComponentAdapter<T>
      Returns:
      the next component adapter in line or null if there is no delegate ComponentAdapter.

    • findAdapterOfType

      public final <U extends ComponentAdapter> U findAdapterOfType(Class<U> adapterType)
      Description copied from interface: ComponentAdapter
      Locates a component adapter of type componentAdapterType in the ComponentAdapter chain. Will return null if there is no adapter of the given type.
      Specified by:
      findAdapterOfType in interface ComponentAdapter<T>
      Type Parameters:
      U - the type of ComponentAdapter being located.
      Parameters:
      adapterType - the class of the adapter type being located. Never null.
      Returns:
      the appropriate component adapter of type U. May return null if the component adapter type is not returned.

    • accept

      public void accept(PicoVisitor visitor)
      Description copied from interface: ComponentAdapter
      Accepts a visitor for this ComponentAdapter. The method is normally called by visiting a PicoContainer, that cascades the visitor also down to all its ComponentAdapter instances.
      Specified by:
      accept in interface ComponentAdapter<T>
      Parameters:
      visitor - the visitor.

    • changeMonitor

      public void changeMonitor(ComponentMonitor monitor)
      Delegates change of monitor if the delegate supports a component monitor strategy. Changes the component monitor used
      Specified by:
      changeMonitor in interface ComponentMonitorStrategy
      Parameters:
      monitor - the new ComponentMonitor to use

    • currentMonitor

      public ComponentMonitor currentMonitor()
      Returns delegate's current monitor if the delegate supports a component monitor strategy. Returns the monitor currently used
      Specified by:
      currentMonitor in interface ComponentMonitorStrategy
      Returns:
      The ComponentMonitor currently used
      Throws:
      PicoCompositionException - if no component monitor is found in delegate

    • start

      public void start(PicoContainer container)
      Invokes delegate start method if the delegate is a Behavior Invoke the "start" method on the component.
      Specified by:
      start in interface ComponentLifecycle<T>
      Parameters:
      container - the container to "start" the component

    • stop

      public void stop(PicoContainer container)
      Invokes delegate stop method if the delegate is a Behavior Invoke the "stop" method on the component.
      Specified by:
      stop in interface ComponentLifecycle<T>
      Parameters:
      container - the container to "stop" the component

    • dispose

      public void dispose(PicoContainer container)
      Invokes delegate dispose method if the delegate is a Behavior Invoke the "dispose" method on the component.
      Specified by:
      dispose in interface ComponentLifecycle<T>
      Parameters:
      container - the container to "dispose" the component

    • componentHasLifecycle

      public boolean componentHasLifecycle()
      Invokes delegate hasLifecycle method if the delegate is a Behavior Test if a component honors a lifecycle.
      Specified by:
      componentHasLifecycle in interface ComponentLifecycle<T>
      Returns:
      true if the component has a lifecycle

    • isStarted

      public boolean isStarted()
      Specified by:
      isStarted in interface ComponentLifecycle<T>

    • start

      public void start(Object component)
      Invokes delegate start method if the delegate is a LifecycleStrategy Invoke the "start" method on the component instance if this is startable. It is up to the implementation of the strategy what "start" and "startable" means.
      Specified by:
      start in interface LifecycleStrategy
      Parameters:
      component - the instance of the component to start

    • stop

      public void stop(Object component)
      Invokes delegate stop method if the delegate is a LifecycleStrategy Invoke the "stop" method on the component instance if this is stoppable. It is up to the implementation of the strategy what "stop" and "stoppable" means.
      Specified by:
      stop in interface LifecycleStrategy
      Parameters:
      component - the instance of the component to stop

    • dispose

      public void dispose(Object component)
      Invokes delegate dispose method if the delegate is a LifecycleStrategy Invoke the "dispose" method on the component instance if this is disposable. It is up to the implementation of the strategy what "dispose" and "disposable" means.
      Specified by:
      dispose in interface LifecycleStrategy
      Parameters:
      component - the instance of the component to dispose

    • hasLifecycle

      public boolean hasLifecycle(Class<?> type)
      Invokes delegate hasLifecycle(Class) method if the delegate is a LifecycleStrategy Test if a component instance has a lifecycle.
      Specified by:
      hasLifecycle in interface LifecycleStrategy
      Parameters:
      type - the component's type
      Returns:
      true if the component has a lifecycle

    • isLazy

      public boolean isLazy(ComponentAdapter<?> adapter)
      Description copied from interface: LifecycleStrategy
      Is a component eager (not lazy) in that it should start when start() or equivalent is called, or lazy (it will only start on first getComponent() ). The default is the first of those two.
      Specified by:
      isLazy in interface LifecycleStrategy
      Parameters:
      adapter -
      Returns:
      true if lazy, false if not lazy

    • toString

      public String toString()
      Overrides:
      toString in class Object