org.picocontainer.behaviors
Class Guarded<T>

java.lang.Object
  extended by org.picocontainer.behaviors.AbstractBehavior<T>
      extended by 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


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