custom query response writer

[Erik Hatcher]

I'm now implementing a custom QueryResponseWriter in order to inject  
some additional information into the output.  I still am generating  
XML output, for the time being, but just with more information per  
document (it will read field information from other documents that  
are linked to the one being written, think relationships here).  I'm  
having difficulty customizing the output because XMLWriter's  
constructor is package protected.  Is there a performance or API  
reason we need this class to be uninstantiable from other packages?   
Having it still final is ok, I believe, but making the constructor  
public would help me write a custom query response writer.

Objections?
Or are there alternatives to consider to keep writing XML and  
leverage the built-in support such that SchemaField.write() provides?

Thanks,
        Erik