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Recursing XML data using REXML

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Carl Bourne

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Dec 11, 2007, 6:59:28 PM12/11/07
to
Hi,

I would like to process an XML file using REXML and recurse down through
some sub elements, e.g. the "group" and "cond" elements in the following
XML:

<rule>
<name>Test Rule</name>
<description>This is a test rule</description>
<order>2</order>
<group operator="all">
<cond name="condition1"/>
<group operator="not">
<cond name="condition2"/>
<group operator="not">
<cond name="condition3"/>
</group>
</group>
</group>
</rule>

However, I need to produce output that maintains the hierarchy so it can
be displayed as a nested list such as:-

<h1>Rule Name - Test Rule</h1>
<h1>Rule Description - Test Rule</h1>
<ul>
<li>group operator is all - condition name is condition 1
<ul>
<li>group operator is not - condition name is condition 2
<ul>
<li>group operator is not - condition name is condition 3</li>
</ul>
</li>
</ul>
</li>
</ul>

I can't seem to find any examples of doing this, would somebody be so
kind as to provide me with an example of how I could do this?

Regards,

Carl
--
Posted via http://www.ruby-forum.com/.

Phrogz

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Dec 11, 2007, 7:05:36 PM12/11/07
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On Dec 11, 4:59 pm, Carl Bourne <carl.bou...@intellect.co.uk> wrote:
> I would like to process an XML file using REXML and recurse down through
> some sub elements, e.g. the "group" and "cond" elements in the following
> XML:
[snip]

> However, I need to produce output that maintains the hierarchy so it can
> be displayed as a nested list such as:-

def show_element( element, level=0 )
print " "*level

# do something with the element here

# Depth-first recursion
element.children.each{ |child|
show_element( child, level+1 )
}
end

Gavin Kistner

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Dec 12, 2007, 9:51:45 AM12/12/07
to
Answer here:
http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/5a948a058d3fac18

Carl Bourne

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Dec 12, 2007, 11:18:20 AM12/12/07
to
Gavin Kistner wrote:
> Answer here:
> http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/5a948a058d3fac18

Thanks for this Gavin, however the link to this seems to be broken.
Please could you confirm it.

Best Regards,

Carl

Gavin Kistner

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Dec 12, 2007, 11:30:16 AM12/12/07
to
Carl Bourne wrote:
> Gavin Kistner wrote:
>> Answer here:
>> http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/5a948a058d3fac18
>
> Thanks for this Gavin, however the link to this seems to be broken.
> Please could you confirm it.

It works for me. If it's not for you, you can also go to:
http://groups.google.com/group/comp.lang.ruby
and find the message titled "Recursing XML data using REXML".

Carl Bourne

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Dec 12, 2007, 11:36:23 AM12/12/07
to
Carl Bourne wrote:
> Gavin Kistner wrote:
>> Answer here:
>> http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/5a948a058d3fac18
>
> Thanks for this Gavin, however the link to this seems to be broken.
> Please could you confirm it.
>
> Best Regards,
>
> Carl

Thanks Gavin,

Seems to work OK now - will give it a try. Thanks again!

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