libxmlplusplus-general

[libxml++] xmlpp::DomParser w/ multiple files

[Daniel H. <dhe...@po...>]

G'day, 
 
     Your group's project is great and I'm helping by using the libraries 
and giving feedback.  I'm not sure if 
there is already something implemented in xmlpp yet but it would be great 
if you could be able to "detach" or 
copy a node (ie. the root node) from the parser so when the parser goes
to open up a second file that the 
original parsed node tree will still exist? 
 
1.  Open up XML file 1 (xml1) 
2.  Detach the root node from the parser (rn1) 
3.  Open up XML file 2 (xml2) 
4.  still have access to rn1 
 
     Essentially I will be opening up thousands of xml files into memory
at once, each following a single DTD 
and I would not like to really need 1000 instances of the parser (and
thus probably 1000 loaded copies of the 
DTD into memory) open when all I really want is just a nice simple
memory-efficient tree of nodes that I can 
refer back to. 
     I'm sure I could do it by using the libxml2 libraries, but any way
to do it without going that deep?  Thanks.  
Cheers, 
 
 
                                            Daniel Hedlund 
                                            dhe...@po... 

Re: [libxml++] xmlpp::DomParser w/ multiple files

[Christophe de V. <cde...@al...>]

Le Lundi 9 Juin 2003 14:07, Daniel Hedlund a =E9crit :
> G'day,

Hi,

>
>      Your group's project is great and I'm helping by using the libraries
> and giving feedback.

Thanks for your interest in libxml++

>  I'm not sure if
> there is already something implemented in xmlpp yet but it would be great
> if you could be able to "detach" or
> copy a node (ie. the root node) from the parser so when the parser goes
> to open up a second file that the
> original parsed node tree will still exist?
>
> 1.  Open up XML file 1 (xml1)
> 2.  Detach the root node from the parser (rn1)
> 3.  Open up XML file 2 (xml2)
> 4.  still have access to rn1
>

There is no such feature for now.
To do so there is two ways :

1. Add a function to DomParser to detach a Document from the parser and avo=
id=20
it to be released by the DomParser
for example :
	Document DomParser::detach_document()
or
	Document DomParser::release_document()

2. Give the possibility to detach any node (and all its children) from a tr=
ee,=20
and to attach it anywhere we want. These could be done with functions like=
=20
Node::attach_node(Node *) / Node::detach_node(Node *).

The 1. should be quite trivial to implement, a patch would be very welcome.
2. implies more reflexion. If someone has ideas on how to do that and want =
to=20
propose a patch, we can discuss it.

Cheers,

Christophe