Metadata handling in the FolderImpl class

[Gonzalo Aguilar Delgado <ga...@aguilardelgado.com>]

Hi Randy, 

I just taking a look on how to implement metadata for the objects of the
CMS. 

I found one curious thing, maybe you can tell me what's the objetive of
this:
----- FolderImpl -------
FolderImpl
#FolderMetaDataImpl (property)
->AbstractNode
  #PageMetadataImpl (property)
  ...
------------------------

----- FolderMetaDataImpl -------
FolderMetaDataImpl
->DocumentImpl
  ->AbstractNode
    #PageMetadataImpl (property)
--------------------------------
-> ===> Extends
#  ===> Property


It confuses me that a property of an object extends from the same class
of the owner class.

I mean, if you need a PageMetadata inside a Folder then PageMetadata  is
really a generic metadata. Why do you need a PageMetadata inside a
folder metadata?


Anyway, main questions are:

Why do you need the metadata to be a DocumentImpl?
 
Wouldn't it be better to be a simple object for storing metadata?

Thank you




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