org.picocontainer.behaviors
Class Guarded<T>

java.lang.Object
  org.picocontainer.behaviors.AbstractBehavior<T>
      org.picocontainer.behaviors.Guarded<T>

Type Parameters:

T -

All Implemented Interfaces:

Serializable, Behavior<T>, ComponentAdapter<T>, ComponentLifecycle<T>, ComponentMonitorStrategy, LifecycleStrategy

public class Guarded<T>
extends AbstractBehavior<T>

behaviour for allows components to be guarded by another component

Author:

Paul Hammant

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.picocontainer.ComponentAdapter

ComponentAdapter.NOTHING

Field Summary

Fields inherited from class org.picocontainer.behaviors.AbstractBehavior

delegate

Constructor Summary

Guarded(ComponentAdapter delegate, String guard)

Method Summary

T	getComponentInstance(PicoContainer container, Type into) Retrieve the component instance.
String	getDescriptor() Get a string key descriptor of the component adapter for use in toString()

Methods inherited from class org.picocontainer.behaviors.AbstractBehavior

accept, changeMonitor, componentHasLifecycle, currentMonitor, dispose, dispose, findAdapterOfType, getComponentImplementation, getComponentInstance, getComponentKey, getDelegate, hasLifecycle, isLazy, isStarted, start, start, stop, stop, toString, verify

Methods inherited from class java.lang.Object

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

Constructor Detail

Guarded

public Guarded(ComponentAdapter delegate,
               String guard)

Method Detail

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>

Overrides:

getComponentInstance in class AbstractBehavior<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.

getDescriptor

public String getDescriptor()

Description copied from interface: ComponentAdapter

Get a string key descriptor of the component adapter for use in toString()

Returns:

the descriptor