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From Erik Hatcher <>
Subject Re: Why is Document final?
Date Fri, 23 Dec 2005 10:31:04 GMT

On Dec 23, 2005, at 5:00 AM, Steven Pannell wrote:
> Can someone please tell my why the Document class has no interface  
> and is
> final?

Primarily because Lucene controls the construction of Document  
instances returned from Hits.

> I want to create some documents that have some standard fields (eg:  
> creation
> date), and I don't want to keep repeating my code.  This way I  
> ensure some
> standard conventions in all my documents.

You could ensure this by writing a wrapping method or class that  
creates Documents for you.

> What's the reason behind this? What's the argument against making an
> interface and not having the document final?

How would Lucene reconstruct the Document instance from Hits using  
your own implementation?


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