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org.apache.cocoon.components.elementprocessor.impl
Class AbstractElementProcessorFactory

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.components.elementprocessor.impl.AbstractElementProcessorFactory

All Implemented Interfaces:

Component, LogEnabled, ElementProcessorFactory

Direct Known Subclasses:

HSSFElementProcessorFactory

public abstract class AbstractElementProcessorFactory
extends AbstractLogEnabled
implements ElementProcessorFactory, Component

Create instances of specific ElementProcessor implementations to handle specific XML elements and their content.

Version:

CVS $Id: AbstractElementProcessorFactory.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Marc Johnson (marc_johnson27591@hotmail.com)

Field Summary

Fields inherited from interface org.apache.cocoon.components.elementprocessor.ElementProcessorFactory

ROLE

Constructor Summary

protected

AbstractElementProcessorFactory() Protected default constructor

Method Summary

protected void	addElementProcessorProgenitor(String name, Object progenitor) A method for extending classes to populate the map.
protected ElementProcessor	constructElementProcessor(Constructor progenitor) A reference implementation of doCreateElementProcessor that can be used by an extending class whose progenitors are Constructor objects that can create new instances of ElementProcessor implementations.
ElementProcessor	createElementProcessor(String name) Given an XML element name, create and return an appropriate ElementProcessor.
protected ElementProcessor	createNewElementProcessorInstance(Class progenitor) A reference implementation of doCreateElementProcessor that can be used by an extending class whose progenitors are Class objects for ElementProcessor implementations.
protected abstract ElementProcessor	doCreateElementProcessor(Object progenitor) The method that a concrete extension of AbstractElementProcessorFactory must implement.
protected Object	lookupElementProcessorProgenitor(String name) A method to get the progenitor value associated with a specified element name.

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractElementProcessorFactory

protected AbstractElementProcessorFactory()

Protected default constructor

Method Detail

createElementProcessor

public ElementProcessor createElementProcessor(String name)
                                        throws CannotCreateElementProcessorException

Given an XML element name, create and return an appropriate ElementProcessor.

Specified by:

createElementProcessor in interface ElementProcessorFactory

Parameters:

name - element name

Returns:

the specified ElementProcessor

Throws:

CannotCreateElementProcessorException - if there is no ElementProcessor available for the specified name

addElementProcessorProgenitor

protected void addElementProcessorProgenitor(String name,
                                             Object progenitor)

A method for extending classes to populate the map.

Parameters:

name - the element name for this progenitor; cannot be null ot empty

progenitor - an object that can be used to generate an appropriate ElementProcessor; cannot be nukk

Throws:

IllegalArgumentException - if name is already in the map or progenitor is null.

lookupElementProcessorProgenitor

protected Object lookupElementProcessorProgenitor(String name)

A method to get the progenitor value associated with a specified element name.

Parameters:

name - the element name

Returns:

the associated ElementProcessor progenitor; will be null if the element name has not yet been associated with a progenitor.

doCreateElementProcessor

protected abstract ElementProcessor doCreateElementProcessor(Object progenitor)
                                                      throws CannotCreateElementProcessorException

The method that a concrete extension of AbstractElementProcessorFactory must implement. When this method is called, the element name has already been looked up in the map and a progenitor Object has been acquired. The progenitor is guaranteed not to be null.

Parameters:

progenitor - the object from which to create an ElementProcessor

Returns:

freshly created ElementProcessor

Throws:

CannotCreateElementProcessorException - if the specified ElementProcessor cannot be created.

createNewElementProcessorInstance

protected ElementProcessor createNewElementProcessorInstance(Class progenitor)
                                                      throws CannotCreateElementProcessorException

A reference implementation of doCreateElementProcessor that can be used by an extending class whose progenitors are Class objects for ElementProcessor implementations.

Parameters:

progenitor - a Class representing an ElementProcessor

Returns:

the new ElementProcessor instance

Throws:

CannotCreateElementProcessorException - if the ElementProcessor cannot be created.

constructElementProcessor

protected ElementProcessor constructElementProcessor(Constructor progenitor)
                                              throws CannotCreateElementProcessorException

A reference implementation of doCreateElementProcessor that can be used by an extending class whose progenitors are Constructor objects that can create new instances of ElementProcessor implementations.

Parameters:

progenitor - a Constructor of an ElementProcessor

Returns:

the newly created ElementProcessor

Throws:

CannotCreateElementProcessorException - if the ElementProcessor cannot be created.