org.picocontainer.defaults

Class ImplementationHidingComponentAdapter

java.lang.Object

org.picocontainer.defaults.DecoratingComponentAdapter

org.picocontainer.defaults.ImplementationHidingComponentAdapter

All Implemented Interfaces:

java.io.Serializable, ComponentAdapter, ComponentMonitorStrategy, LifecycleStrategy, LifecycleManager

Direct Known Subclasses:

ImplementationHidingComponentAdapter

public class ImplementationHidingComponentAdapter
extends DecoratingComponentAdapter

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.

Since:

1.2, moved from package org.picocontainer.alternatives

Author:

Aslak Hellesøy, Paul Hammant

See Also:

for a more feature-rich version of this class., Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	strict

Constructor Summary

Constructors

Constructor and Description
ImplementationHidingComponentAdapter(ComponentAdapter delegate, boolean strict) Creates an ImplementationHidingComponentAdapter with a delegate

Method Summary

Methods

Modifier and Type	Method and Description
private java.lang.Object	createProxy(java.lang.Class[] interfaces, PicoContainer container, java.lang.ClassLoader classLoader)
java.lang.Object	getComponentInstance(PicoContainer container) Retrieve the component instance.
private java.lang.Class[]	verifyInterfacesOnly(java.lang.Class[] classes)

Methods inherited from class org.picocontainer.defaults.DecoratingComponentAdapter

accept, changeMonitor, currentMonitor, dispose, dispose, getComponentImplementation, getComponentKey, getDelegate, hasLifecycle, hasLifecycle, start, start, stop, stop, toString, verify

Methods inherited from class java.lang.Object

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

Field Detail

strict

private final boolean strict

Constructor Detail

ImplementationHidingComponentAdapter

public ImplementationHidingComponentAdapter(ComponentAdapter delegate,
                                    boolean strict)

Creates an ImplementationHidingComponentAdapter with a delegate

Parameters:

delegate - the component adapter to which this adapter delegates

strict - the scrict mode boolean

Method Detail

getComponentInstance

public java.lang.Object getComponentInstance(PicoContainer container)
                                      throws PicoInitializationException,
                                             PicoIntrospectionException,
                                             AssignabilityRegistrationException,
                                             NotConcreteRegistrationException

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, CachingComponentAdapter will always return the same instance.

Specified by:

getComponentInstance in interface ComponentAdapter

Overrides:

getComponentInstance in class DecoratingComponentAdapter

Parameters:

container - the PicoContainer, that is used to resolve any possible dependencies of the instance.

Returns:

the component instance.

Throws:

PicoInitializationException - if the component could not be instantiated.

PicoIntrospectionException - if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambigous situation within the container.

AssignabilityRegistrationException

NotConcreteRegistrationException

createProxy

private java.lang.Object createProxy(java.lang.Class[] interfaces,
                           PicoContainer container,
                           java.lang.ClassLoader classLoader)

verifyInterfacesOnly

private java.lang.Class[] verifyInterfacesOnly(java.lang.Class[] classes)