org.picocontainer.behaviors
Class HiddenImplementation<T>

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

All Implemented Interfaces:

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

Direct Known Subclasses:

Intercepted

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.

Author:

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

ComponentAdapter.NOTHING

Field Summary

Fields inherited from class org.picocontainer.behaviors.AbstractBehavior

delegate

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

HiddenImplementation

public HiddenImplementation(ComponentAdapter<T> delegate)

Creates an ImplementationHidingComponentAdapter with a delegate

Parameters:

delegate - the component adapter to which this adapter delegates

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

createProxy

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

invokeMethod

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

Throws:

Throwable