[jdom-interest] Comparing two XML files using JDOM

[Michael Kay]

First you need to define what you mean by duplicate - ie. what variations
you want to tolerate (e.g. order of attributes, choice of namespace
prefixes, insignificant whitespace, whether to ignore comments, use or
non-use of entities, Unicode normalization).
 
For many purposes a good approach is to convert both documents into XML
Canonical Form and then compare them lexically.
 
There's the deep-equal() function in XPath which defines one particular set
of rules, and Saxon has a saxon:deep-equal() function that allows you more
choice over the rules you want to apply.
 
Michael Kay
http://www.saxonica.com/


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From: jdom-interest-bounces at jdom.org [mailto:jdom-interest-bounces at jdom.org]
On Behalf Of vijayaraghavan.subramaniam at wipro.com
Sent: 18 March 2008 13:59
To: paul at activemath.org; frode at fritid.as; jdom-interest at jdom.org
Subject: RE: [jdom-interest] Comparing two XML files using JDOM



My objective to find duplicate xml files or elements & generate a report
(PDF)

 


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From: jdom-interest-bounces at jdom.org [mailto:jdom-interest-bounces at jdom.org]
On Behalf Of Paul Libbrecht
Sent: Tuesday, March 18, 2008 6:31 PM
To: frode at fritid.as; jdom-interest at jdom.org interest
Subject: Re: [jdom-interest] Comparing two XML files using JDOM

 

Oh but if it's just about equality, and not reporting differences, then I
have already implemented one.

 

Vijay, what was your objective?

 

paul

 

 

Le 18 mars 08 à 13:10, frode at fritid.as a écrit :





XMLUnit does comparisons, and you can plug in differnce-listners that can
'simulate' equal values even if they're not

 

 



Paul Libbrecht <paul at activemath.org>
Sent by: jdom-interest-bounces at jdom.org
03/18/2008 11:09 AM

 To   <vijayaraghavan.subramaniam at wipro.com>
 cc   jdom-interest at jdom.org
 bcc   
 Subject   Re: [jdom-interest] Comparing two XML files using JDOM
  

Mmmh... I doubt there... it's all loaded in memory, just as JDOM. Both seem
to be somewhat lightweight though (compared to monsters such as Xerces'
DOM).
You'd need quite an elaborate diff engine to do something that does not load
in memory, SAX or even StAX parsing is not enough there since you may need
to go backwards.

I have made no tests with big files.
Do you have a solution to propose?
Do others?

paul

Le 18 mars 08 à 09:47, <vijayaraghavan.subramaniam at wipro.com> a écrit :

Paul,
How about performance for  parsing/comparing two large XML documents using
3dm tool?
Vijay


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From: Paul Libbrecht [mailto:paul at activemath.org]
Sent: Tue 3/18/2008 2:08 PM
To: Vijayaraghavan Subramaniam (WT01 -
Technology,Media,Transportation&Services)
Cc: jdom-interest at jdom.org
Subject: Re: [jdom-interest] Comparing two XML files using JDOM

I've never found such but 3dm is a tool that can do XML diffing and with a
few lines of code you plug the jdom document through a sax stream into 3dm.

paul


Le 18 mars 08 à 07:50, <vijayaraghavan.subramaniam at wipro.com> a écrit :

Hi All,
Is there any utility class exists in JDOM to compare two XML files.
Regards,
Vijay

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