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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2006 Artem Pavlenko
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
//$Id$
#include <mapnik/filter_factory.hpp>
#include <mapnik/expression_grammar.hpp>
#include <mapnik/config_error.hpp>
#include <mapnik/unicode.hpp>
// boost
#include <boost/algorithm/string.hpp>
namespace mapnik
{
class filter_factory
{
public:
static expression_ptr compile(std::string const& str,transcoder const& tr)
{
expression_ptr expr(new expr_node(true));
std::string::const_iterator itr = str.begin();
std::string::const_iterator end = str.end();
mapnik::expression_grammar<std::string::const_iterator> g(tr);
bool r = boost::spirit::qi::phrase_parse(itr,end,g, boost::spirit::standard_wide::space,*expr);
if (r && itr==end)
{
return expr;
}
else
{
// Backward compatiblity for version pre 0.8.0
// To be removed in 0.9.0...
if (!boost::algorithm::icontains(str,"'")
&& !boost::algorithm::icontains(str,"[")
&& !boost::algorithm::icontains(str,"]")
&& !boost::algorithm::icontains(str," ")
&& !boost::algorithm::icontains(str,"\""))
{
expression_ptr expr1(new expr_node(true));
mapnik::expression_grammar<std::string::const_iterator> g1(tr);
std::string str1("[" + str + "]");
std::string::const_iterator itr1 = str1.begin();
std::string::const_iterator end1 = str1.end();
bool r1 = boost::spirit::qi::phrase_parse(itr1,end1,g1, boost::spirit::standard_wide::space,*expr1);
if (r1 && itr1==end1)
{
std::clog << "Deprecation Warning: symbolizer value now an expression, please wrap properly in brackets like \"" + str1 + "\"\n";
return expr1;
}
else
{
throw config_error( "Failed to parse expression: \"" + str + "\"" );
}
}
else
{
throw config_error( "Failed to parse expression: \"" + str + "\"" );
}
}
}
};
expression_ptr parse_expression (std::string const& wkt,std::string const& encoding)
{
transcoder tr(encoding);
return filter_factory::compile(wkt,tr);
}
expression_ptr parse_expression (std::string const& wkt)
{
return parse_expression(wkt,"utf8");
}
}
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