Re: [Vtd-xml-users] Random Access Proposal (take 2)

[Jimmy Z. <cra...@co...>]

I believe you can relative location path for that
instead of using /ccc/*
you only need to say         ccc
(relative location path is basically loation paths
that don't start from root)
----- Original Message ----- 
From: "Mark Swanson" <ma...@Sc...>
To: "Rodrigo Cunha" <rn...@gm...>
Cc: <vtd...@li...>
Sent: Wednesday, February 28, 2007 6:56 PM
Subject: Re: [Vtd-xml-users] Random Access Proposal (take 2)


> Rodrigo Cunha wrote:
>> For a SimpleContext, or something similar:
>>
>> The comparison operator could just compare the arrays containing the
>> internal state of Navigator.
>>
>> The hashcode would be the XOR of all elements in the array, that
>> implements java hashcode and equals in a compatible way with the assumed
>> rules in java libraries.
>>
>> Jimmy, I think my "SimpleContext" or whatever you want to call it, if
>> properly implemented and perhaps with a few extra functions  could solve
>> all the problems of random access.
>>
>> I think we just want something with the functionality of push() and
>> pop() but that can be extracted and kept outside, memorizing the
>> equivalent of a single stack position, and perhaps with a bit more
>> functionality.
>
> It will be interesting to see how much / little info we can get away
> with saving and still be able to start an XPath expression from an
> arbitrary point.
>
> Important: it may make the implementation easier if we make the
> arbitrary starting point the new document root - just for xpath
> evaluation purposes. I think this is perfect, actually. I don't want
> anything except for the node and its children - that's why I'm
> explicitly pointing there in the first place.
>
> F.E.
> (forgive the illegal simplified syntax..)
>
> aaa
>   bbb
>     ccc    <- Index saved, new root for xpath eval.
>       eee
>       fff
>     /ccc
>     dd
> ...
>
> I'd want to say something like this:
>
> vtdNav.toElement(cccIndex); // reset cursor to ccc
> ap.selectXPath("/ccc/*")
>
> Cheers.
>
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