implement from_geojson in terms of parse_(feature|geometry)

include/mapnik/json/feature_parser.hpp

@@ -25,25 +25,12 @@
 
 // mapnik
 #include <mapnik/feature.hpp>
-#include <mapnik/json/feature_grammar.hpp>
-
-// boost
-#include <boost/spirit/include/qi.hpp>
-#include <boost/spirit/include/phoenix_core.hpp>
+// stl
+#include <string>
 
 namespace mapnik { namespace json {
 
-inline bool from_geojson(std::string const& json, mapnik::feature_impl & feature)
-{
-    static const mapnik::transcoder tr("utf8");
-    using iterator_type = char const*;
-    static const mapnik::json::feature_grammar<iterator_type,mapnik::feature_impl> g(tr);
-    using namespace boost::spirit;
-    standard::space_type space;
-    iterator_type start = json.c_str();
-    iterator_type end = start + json.length();
-    return qi::phrase_parse(start, end, (g)(boost::phoenix::ref(feature)), space);
-}
+bool from_geojson(std::string const& json, mapnik::feature_impl & feature);
 
 }}
 

src/json/feature_from_geojson.cpp

@@ -0,0 +1,45 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2016 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
+ *
+ *****************************************************************************/
+
+
+// mapnik
+#include <mapnik/json/geometry_parser.hpp>
+#include <mapnik/json/parse_feature.hpp>
+
+namespace mapnik { namespace json {
+
+bool from_geojson(std::string const& json, feature_impl & feature)
+{
+    try
+    {
+        const char* start = json.c_str();
+        const char* end = start + json.length();
+        mapnik::json::parse_feature(start, end, feature);
+    }
+    catch (...)
+    {
+        return false;
+    }
+    return true;
+}
+
+}}

src/json/geometry_from_geojson.cpp

@@ -0,0 +1,49 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2016 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
+ *
+ *****************************************************************************/
+
+
+// mapnik
+#include <mapnik/json/geometry_parser.hpp>
+#include <mapnik/json/parse_feature.hpp>
+#include <mapnik/feature_factory.hpp>
+
+namespace mapnik { namespace json {
+
+bool from_geojson(std::string const& json, mapnik::geometry::geometry<double> & geom)
+{
+    try
+    {
+        mapnik::context_ptr ctx = std::make_shared<mapnik::context_type>();
+        mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx, -1)); // temp geometry holder
+        const char* start = json.c_str();
+        const char* end = start + json.length();
+        mapnik::json::parse_geometry(start, end, *feature);
+        geom = std::move(feature->get_geometry());
+    }
+    catch (...)
+    {
+        return false;
+    }
+    return true;
+}
+
+}}