net.sf.composite.specialize.specializers
Class BaseSpecializer

java.lang.Object
  net.sf.composite.specialize.specializers.BaseSpecializer

All Implemented Interfaces:

Specializer

Direct Known Subclasses:

CachingSpecializerProxy, CloningSpecializer, Jdk13ProxySpecializer

public abstract class BaseSpecializer
extends java.lang.Object
implements Specializer

A convenient base class for specializers. This base class takes care of exception handling, argument validation and logging.

Since:

Mar 11, 2005

Author:

Matt Sgarlata

Field Summary

protected org.apache.commons.logging.Log

log

Constructor Summary

BaseSpecializer()

Method Summary

ComponentAccessor	getComponentAccessor()
boolean	isSpecializable(java.lang.Object composite, java.lang.Class specializedType) Determines whether the components in the composite can be used to create a specialized version of the composite that implements specializedType.
protected abstract boolean	isSpecializableImpl(java.lang.Object composite, java.lang.Class specializedType) Implementation template method.
void	setComponentAccessor(ComponentAccessor componentExtractor)
java.lang.Object	specialize(java.lang.Object composite, java.lang.Class specializedType) Uses the components in the composite to create a composite that implements specializedType and is composed only those
protected abstract java.lang.Object	specializeImpl(java.lang.Object composite, java.lang.Class specializedType)

Methods inherited from class java.lang.Object

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

Field Detail

log

protected final org.apache.commons.logging.Log log

Constructor Detail

BaseSpecializer

public BaseSpecializer()

Method Detail

isSpecializableImpl

protected abstract boolean isSpecializableImpl(java.lang.Object composite,
                                               java.lang.Class specializedType)
                                        throws java.lang.Exception

Implementation template method.

Parameters:

composite -

specializedType -

Returns:

boolean

Throws:

java.lang.Exception

isSpecializable

public final boolean isSpecializable(java.lang.Object composite,
                                     java.lang.Class specializedType)
                              throws SpecializationException

Description copied from interface: Specializer

Determines whether the components in the composite can be used to create a specialized version of the composite that implements specializedType.

Specified by:

isSpecializable in interface Specializer

Parameters:

composite - the composite from which the components will be extracted

specializedType - the type to be exposed

Throws:

SpecializationException - if the new, specialized, composite could not be created

specializeImpl

protected abstract java.lang.Object specializeImpl(java.lang.Object composite,
                                                   java.lang.Class specializedType)
                                            throws java.lang.Exception

Throws:

java.lang.Exception

specialize

public final java.lang.Object specialize(java.lang.Object composite,
                                         java.lang.Class specializedType)
                                  throws SpecializationException

Description copied from interface: Specializer

Uses the components in the composite to create a composite that implements specializedType and is composed only those

Specified by:

specialize in interface Specializer

Parameters:

composite - the composite from which the components will be extracted

specializedType - the type to be exposed

Throws:

SpecializationException - if the new, specialized, composite could not be created

getComponentAccessor

public ComponentAccessor getComponentAccessor()

setComponentAccessor

public void setComponentAccessor(ComponentAccessor componentExtractor)