Class HiddenImplementation<T>

  extended by org.picocontainer.behaviors.AbstractBehavior<T>
      extended by org.picocontainer.behaviors.HiddenImplementation<T>
All Implemented Interfaces:
Serializable, Behavior<T>, ComponentAdapter<T>, ComponentLifecycle<T>, ComponentMonitorStrategy, LifecycleStrategy
Direct Known Subclasses:

public class HiddenImplementation<T>
extends AbstractBehavior<T>

This component adapter makes it possible to hide the implementation of a real subject (behind a proxy) provided the key is an interface.

This class exists here, because a) it has no deps on external jars, b) dynamic proxy is quite easy. The user is prompted to look at picocontainer-gems for alternate and bigger implementations.

Aslak Hellesøy, Paul Hammant
See Also:
for a more feature-rich version of this class., Serialized Form

Nested Class Summary
Nested classes/interfaces inherited from interface org.picocontainer.ComponentAdapter
Field Summary
Fields inherited from class org.picocontainer.behaviors.AbstractBehavior
Constructor Summary
HiddenImplementation(ComponentAdapter<T> delegate)
          Creates an ImplementationHidingComponentAdapter with a delegate
Method Summary
protected  T createProxy(Class[] interfaces, PicoContainer container, ClassLoader classLoader)
 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()
protected  Object invokeMethod(Object componentInstance, Method method, Object[] args, PicoContainer container)
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


public HiddenImplementation(ComponentAdapter<T> delegate)
Creates an ImplementationHidingComponentAdapter with a delegate

delegate - the component adapter to which this adapter delegates
Method Detail


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>
getComponentInstance in class AbstractBehavior<T>
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.
the component instance.
PicoCompositionException - if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambiguous situation within the container.


public String getDescriptor()
Description copied from interface: ComponentAdapter
Get a string key descriptor of the component adapter for use in toString()

the descriptor


protected T createProxy(Class[] interfaces,
                        PicoContainer container,
                        ClassLoader classLoader)


protected Object invokeMethod(Object componentInstance,
                              Method method,
                              Object[] args,
                              PicoContainer container)
                       throws Throwable

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