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/*
* (C) Copyright 2002, Schlund+Partner AG
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// Local configuration
#include "config.h"
// Implementation
#include "XMLNodeSet.hpp"
// STDC++
#include <cassert>
// Local
#include "XMLTree.hpp"
namespace SP {
namespace GXML {
// Copy of XPathContext from XMLTree.cpp
class XPathContextNS
{
public:
XPathContextNS(xmlDocPtr const doc)
:_context(xmlXPathNewContext(doc))
{
if (!_context)
{
throw XMLException(XMLException::XMLTREE_CREATE_CONTEXT);
}
}
~XPathContextNS()
{
xmlXPathFreeContext(_context);
}
xmlXPathContextPtr get() const
{
return _context;
}
private:
xmlXPathContextPtr const _context;
};
XMLNodeSet::XMLNodeSet( const std::string& xpath, const XMLTree* tree )
{
XPathContextNS context(tree->getDocPtr());
xPathObj_ = xmlXPathEval( (xmlChar*)xpath.c_str(), context.get());
// this seem never to happen...
if ( xPathObj_ == NULL ) {
throw XMLException( XMLException::XMLNODESET_EVAL );
}
assert( xPathObj_ );
// happens if xpath doesn't point to node(s)
if ( xPathObj_->nodesetval == NULL ) {
throw XMLException( XMLException::XMLNODESET_NO_SET );
}
assert( xPathObj_->nodesetval );
// happens if xpath doesn't exist
if ( xPathObj_->nodesetval->nodeNr <= 0 ) {
throw XMLException( XMLException::XMLNODESET_NO_MATCH );
}
assert( xPathObj_->nodesetval->nodeNr > 0 );
}
XMLNodeSet::~XMLNodeSet()
{
xmlXPathFreeObject( xPathObj_ );
}
int
XMLNodeSet::size()
{
assert( xPathObj_ && xPathObj_->nodesetval );
return xPathObj_->nodesetval->nodeNr;
}
XMLNodeSet::Iterator
XMLNodeSet::begin()
{
assert( xPathObj_ && xPathObj_->nodesetval );
return XMLNodeSet::Iterator( xPathObj_->nodesetval );
}
XMLNodeSet::Iterator
XMLNodeSet::end()
{
return XMLNodeSet::Iterator();
}
////////////////////////////////////////////////////////////////////////////////
// NodeSet Iterator
//
XMLNodeSet::Iterator::Iterator()
{
pos_ = 0;
set_ = NULL;
}
XMLNodeSet::Iterator::Iterator( const xmlNodeSetPtr set )
{
pos_ = 0;
set_ = set;
}
XMLNodeSet::Iterator::~Iterator()
{}
XMLNodeSet::Iterator
XMLNodeSet::Iterator::operator ++()
{
assert( set_ );
if ( pos_ < set_->nodeNr - 1 ) {
++pos_;
} else {
pos_ = 0;
set_ = NULL;
}
return *this;
}
bool
XMLNodeSet::Iterator::operator !=( const XMLNodeSet::Iterator& iter )
{
if ( ( this->pos_ != iter.pos_ ) || ( this->set_ != iter.set_ ) ) {
return true;
} else {
return false;
}
}
XMLNode
XMLNodeSet::Iterator::operator *()
{
assert( set_ && set_->nodeTab[pos_] );
XMLNode result( set_->nodeTab[pos_] );
// return copy of XMLNode
return result;
}
int
XMLNodeSet::Iterator::getPosition()
{
assert( set_ );
return pos_;
}
}}
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