Re: "working with Dom input and output" pattern but with DOM objects created with NEW

[David N Bertoni/Cambridge/IBM <da...@us.ibm.com>]

You can create a DOM_Document instance with new, but you shouldn't.  It
will work, but it defeats the purpose of DOM_Document, which is a
smart-pointer to an underlying implementation instance.  If you do this,
you must make sure you _never_ make a copy of the pointer, which is a
difficult promise to keep.

It's best to ask questions related solely to Xerces on the Xerces-C list.

Dave



                                                                                                                               
                      "Tankel, Ifat"                                                                                           
                      <Ifat_Tankel@ico         To:      xalan-c-users@xml.apache.org                                           
                      mverse.com>              cc:      (bcc: David N Bertoni/Cambridge/IBM)                                   
                                               Subject: "working with Dom input and output" pattern but with  DOM objects      
                      05/28/2002 10:39         created with NEW                                                                
                      PM                                                                                                       
                                                                                                                               
                                                                                                                               



Hi,
I am using the first part of usage pattern named "working with Dom input
and output"
to create a XalanDocument. This is done in an init method of a class I
wrote (in c++)


// some of the members of my class
static DOMParser *_domParser;
static XercesParserLiaison * _parserLiaison;
DOM_Document * _domDocument;
XalanDocument * _xalanReelDoc;


// initiating the class members
_domParser=new DOMParser();
_parserLiaison = new XercesParserLiaison();
_domDocument =new DOMDocument();


_domParser->parse( xmlfileSource);
*_domDocument= _domParser->getDocument();
_xalanRealDoc= _parserLiaison->createDocument(*_domDocument)





The difference is that I use "new" to create the DOMParser,
XercesParserLiaison and DOMDocument.


I wrote a program that use this class and everything works.


but then I entered Xercess DOM programming guide and I read this:
"Never "new" a DOM object into the heap or make an ordinary C pointer
variable to one, as this will greatly confuse the automatic memory
management.


way "newing" a DOM object do that ?
will I get an exception when this happened?


Ifat


ifat.tankel@comverse.com
Comverse Divisional Developer