[jdom-interest] JDOM and very large files

Todd O'Bryan toddobryan at mac.com
Fri Oct 10 02:18:03 PDT 2003

When I had to parse sections of a large file, I wrote a utility class  
that would load the next element of the kind I was concerned with. For  
instance, if the document was of the form

		lots of stuff
		lots of stuff
		lots of stuff

I subclassed a Reader that would return the next <bar> element and used  
JDOM to parse and manipulate it. If your document is less  
straightforward, that might not be possible, but recall that the point  
of JDOM is that you get the whole XML tree in memory to manipulate and  
play with at once. If you don't want that, you have to decide which  
parts to leave out.


On Friday, October 10, 2003, at 01:07  AM, Daryl Handley wrote:

> Hi everyone,
> I am trying to parse a very large file (1.3 Gb) using JDOM. I have  
> used JDOM
> before with smaller files, but never large ones. It seems like the  
> builder
> attempts to read the whole file into memory and build the document. Is  
> there
> a way to read only part of the document into memory ? I only beed to  
> read
> through the file sequentially, random access to parts of the doc is not
> important. Does anyone have any suggestions how to do this with JDOM ?  
> Java
> in general ? Any other language ?
> Otherwise I may have to write my own parser to do it in PERL. The  
> document
> structure is fairly simple (just huge) so this shouldn't be too hard,  
> but I
> would prefer to do it with JDOM if possible.
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