hi all!
i need to manipulate with remote rdf data manually.
the aim is to show user some data in a dialog (e.g., set of textboxes)
and then retrieve via js all data modifications being made.
hence i looked for nsIRDFDataSource with the following result: to
access the information in a datasource one should use functions like
GetTarget(), GetSource() etc (?)
but i've not found any (even stale) legible example of using of such
functionality! i've written some snippets but they're barely working.
for example, such code
===========================================================
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
var rdf = Components.classes["@mozilla.org/rdf/rdf-service;1"].getService
(Components.interfaces.nsIRDFService);
var ds = rdf.GetDataSourceBlocking("chrome://somepath/somefile.rdf");
ds = ds.QueryInterface(Components.interfaces.nsIRDFDataSource);
var p = rdf.GetResource('urn:ftdlg:data');
var t = rdf.GetResource('rdf:http://www.foo.by/rdf#car-model');
var explSrc = ds.GetSource(p, t, true );
var counter = 0;
var mysource = ds.GetAllResources();
while( mysource.hasMoreElements() ){
var mydata = mysource.getNext();
counter++;
}
alert("explicit source=" + explSrc + "\ntotal: " + counter);
===========================================================
in [p] and [t] i see 'urn:ftdlg:data' and
'rdf:http://www.foo.by/rdf#car-model' respectively.
perhaps i do something extremely stupid...
the [explSrc] is NULL (?) but [counter] correctly shows the
number of entries in rdf. is there any technique to retrieve a real
data from [mydata] variable?
i can show the rdf file if it helps...
in short, i need to get the data from rdf file via xpcom.
any advices or (and?) code examples would be groundbreaking.
thanx.
_______________________________________________
Mozilla-xpcom mailing list
[EMAIL PROTECTED]
http://mail.mozilla.org/listinfo/mozilla-xpcom
