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From Anil Pathak <anilj...@gmail.com>
Subject Re: Fw: RE: [OT] Re: xmlparser simple question
Date Thu, 25 Aug 2005 05:37:58 GMT
Create your InputStream that extends the stream you are using for the
xml retrival. The stream feeds root's starting at begning let it be
<root> and than your xml data ... and </root> end. You provide your
stream to the SAX parser.



On 8/24/05, erikweber@mindspring.com <erikweber@mindspring.com> wrote:
> Sorry, I'm using web mail, and I keep sending responses directly to the sender by accident.
> 
> Erik
> 
> 
> -----Forwarded Message-----
> From: erikweber@mindspring.com
> Sent: Aug 24, 2005 4:26 PM
> To: "Gilbert, Antoine" <AGilbert@korem.com>
> Subject: RE: [OT] Re: xmlparser simple question
> 
> Well, as I said, if you use SAX you won't be loading the entire file into memory.
> 
> The missing root element is another problem. I think SAX parsers that I have used require
the document to be well-formed, whether it's valid or not. I think a missing root element
means the document is not well-formed, however, I cannot confirm that with any references
right off hand. If it's true, however, surely you can figure out a way to wrap your document
stream, and add in the mock root element tags, right?
> 
> Also you might want to look at XMLPullParser, which is what some XMPP (Jabber) packet
libraries use (another low-memory alternative to DOM). However, even the XMPP packets I can
think of are all technically well-formed . . . I don't know of a parser implementation right
off that lets you turn off the well-formed constraint, but there sure oughta be one . . .
As someone else mentioned, perhaps Jakarta Digester can deal with this?
> 
> Erik
> 
> 
> -----Original Message-----
> From: "Gilbert, Antoine" <AGilbert@korem.com>
> Sent: Aug 24, 2005 4:09 PM
> To: Struts Users Mailing List <user@struts.apache.org>, erikweber@mindspring.com
> Subject: RE: [OT] Re: xmlparser simple question
> 
> My file is something like that
> 
> <a>x</a>
> <b>y</b>
> 
> There is no root tags, and I cant modify this file. I would like to be
> able to parse it without loading it entirely in memory (buffer) or
> without make a copy of this file to add the root tags...
> 
> -----Original Message-----
> From: erikweber@mindspring.com [mailto:erikweber@mindspring.com]
> Sent: August 24, 2005 4:09 PM
> To: Struts Users Mailing List
> Subject: [OT] Re: xmlparser simple question
> 
> Gilbert,
> 
> SAX works on an event based model. Memory is not an issue unless *you*
> are caching information as you receive events in your parser handler.
> 
> The parser starts reading the stream. Each time it encounters the
> beginning of an element or an attribute, or the value of an element or
> attribute, or the end of an element or attribute, it simply fires an
> event. Your parser handler receives the event. At that point, the parser
> forgets that part of the stream and moves on to the next part. At any
> one time, the most it's going to cache is a single element or attribute
> name or value.
> 
> I'm not sure though what you mean by "add the root in the parsing
> processing". Perhaps you could explain further.
> 
> Erik
> 
> 
> -----Original Message-----
> From: "Gilbert, Antoine" <AGilbert@korem.com>
> Sent: Aug 24, 2005 3:59 PM
> To: Struts Users Mailing List <user@struts.apache.org>
> Subject: xmlparser simple question
> 
> Hi
> 
> 
> 
> I want to read an xml file using a SAXReader combined with a
> ParserHandler. The file have n o XML root, so I have to find how to add
> it in the parsing processing. Assuming that the file can be pretty big,
> how I can do it without at any time having the entire file in memory ?
> 
> 
> 
> 
> 
> 
> 
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