I have an xsd file and I want to iterate throw an special attribute on the xml belongs to it (Here is my xsd). After creating my classes by codesynthesis like below:
xsdcxx cxx-tree --root-element percolator_output --generate-polymorphic --namespace-map http://per-colator.com/percolator_out/14=xsd pout.xsd
I've writing my main like :
int main (int argc, char* argv[])
{
try
{
auto_ptr<percolator_output> h (percolator_output_ (argv[1]));
//-----percolator_output::peptides_optional& pep (h->peptides ());
for (peptides::peptide_const_iterator i (h->peptides ().begin ()); i != h->peptides ().end (); ++i)
{
cerr << *i << endl;
}
}
catch (const xml_schema::exception& e)
{
cerr << e << endl;
return 1;
}
}
I want to iterate throw the attribute "peptides" on my xml file but the output of h->peptides ()
is percolator_output::peptides_optional
and it's not iterator-able.
The presence of the optional element first need to be confirmed by using the function present()
. If element is present, the function get()
can be used to return a reference to the element. I modified your code as little as possible to make it compile.
#include <iostream>
#include <pout.hxx>
using namespace std;
using namespace xsd;
int main (int argc, char* argv[])
{
try
{
auto_ptr<percolator_output> h (percolator_output_ (argv[1]));
if (h->peptides().present())
{
for (peptides::peptide_const_iterator i (h->peptides ().get().peptide().begin ()); i != h->peptides ().get().peptide().end (); ++i)
{
cerr << *i << endl;
}
}
}
catch (const xml_schema::exception& e)
{
cerr << e << endl;
return 1;
}
}
And also, the command line argument --generate-ostream
was missing to xsdcxx
.
$ xsdcxx cxx-tree --root-element percolator_output --generate-polymorphic --generate-ostream --namespace-map http://per-colator.com/percolator_out/14=xsd pout.xsd
$ g++ -I. main.cc pout.cxx -lxerces-c
$ cat /etc/issue
Ubuntu 12.10 \n \l