/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2011 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/geom_util.hpp> // boost #include <boost/version.hpp> #include <boost/format.hpp> #include <boost/algorithm/string.hpp> #include <boost/filesystem/operations.hpp> #include <boost/make_shared.hpp> // stl #include <iostream> #include <fstream> #include <stdexcept> #include "shape_datasource.hpp" #include "shape_featureset.hpp" #include "shape_index_featureset.hpp" DATASOURCE_PLUGIN(shape_datasource) using mapnik::String; using mapnik::Double; using mapnik::Integer; using mapnik::datasource_exception; using mapnik::filter_in_box; using mapnik::filter_at_point; using mapnik::attribute_descriptor; shape_datasource::shape_datasource(const parameters ¶ms, bool bind) : datasource (params), type_(datasource::Vector), file_length_(0), indexed_(false), row_limit_(*params_.get<int>("row_limit",0)), desc_(*params.get<std::string>("type"), *params.get<std::string>("encoding","utf-8")) { boost::optional<std::string> file = params.get<std::string>("file"); if (!file) throw datasource_exception("Shape Plugin: missing <file> parameter"); boost::optional<std::string> base = params.get<std::string>("base"); if (base) shape_name_ = *base + "/" + *file; else shape_name_ = *file; boost::algorithm::ireplace_last(shape_name_,".shp",""); if (bind) { this->bind(); } } void shape_datasource::bind() const { if (is_bound_) return; if (!boost::filesystem::exists(shape_name_ + ".shp")) { throw datasource_exception("Shape Plugin: shapefile '" + shape_name_ + ".shp' does not exist"); } if (boost::filesystem::is_directory(shape_name_ + ".shp")) { throw datasource_exception("Shape Plugin: shapefile '" + shape_name_ + ".shp' appears to be a directory not a file"); } if (!boost::filesystem::exists(shape_name_ + ".dbf")) { throw datasource_exception("Shape Plugin: shapefile '" + shape_name_ + ".dbf' does not exist"); } try { boost::shared_ptr<shape_io> shape_ref = boost::make_shared<shape_io>(shape_name_); init(*shape_ref); for (int i=0;i<shape_ref->dbf().num_fields();++i) { field_descriptor const& fd=shape_ref->dbf().descriptor(i); std::string fld_name=fd.name_; switch (fd.type_) { case 'C': // character case 'D': // Date case 'M': // Memo, a string case 'L': // logical case '@': // timestamp desc_.add_descriptor(attribute_descriptor(fld_name, String)); break; case 'N': case 'O': // double case 'F': // float { if (fd.dec_>0) { desc_.add_descriptor(attribute_descriptor(fld_name,Double,false,8)); } else { desc_.add_descriptor(attribute_descriptor(fld_name,Integer,false,4)); } break; } default: #ifdef MAPNIK_DEBUG // I - long // G - ole // + - autoincrement std::clog << "Shape Plugin: unknown type " << fd.type_ << std::endl; #endif break; } } // for indexed shapefiles we keep open the file descriptor for fast reads if (indexed_) { shape_ = shape_ref; } } catch (const datasource_exception& ex) { std::clog << "Shape Plugin: error processing field attributes, " << ex.what() << std::endl; throw; } catch (const std::exception& ex) { std::clog << "Shape Plugin: error processing field attributes, " << ex.what() << std::endl; throw; } catch (...) // exception: pipe_select_interrupter: Too many open files { std::clog << "Shape Plugin: error processing field attributes" << std::endl; throw; } is_bound_ = true; } shape_datasource::~shape_datasource() {} void shape_datasource::init(shape_io& shape) const { //first read header from *.shp int file_code=shape.shp().read_xdr_integer(); if (file_code!=9994) { //invalid file code throw datasource_exception("Shape Plugin: " + (boost::format("wrong file code : %d") % file_code).str()); } shape.shp().skip(5*4); file_length_=shape.shp().read_xdr_integer(); int version=shape.shp().read_ndr_integer(); if (version!=1000) { //invalid version number throw datasource_exception("Shape Plugin: " + (boost::format("invalid version number: %d") % version).str()); } int shape_type = shape.shp().read_ndr_integer(); if (shape_type == shape_io::shape_multipatch) throw datasource_exception("Shape Plugin: shapefile multipatch type is not supported"); shape.shp().read_envelope(extent_); #ifdef MAPNIK_DEBUG double zmin = shape.shp().read_double(); double zmax = shape.shp().read_double(); double mmin = shape.shp().read_double(); double mmax = shape.shp().read_double(); std::clog << "Shape Plugin: Z min/max " << zmin << "," << zmax << std::endl; std::clog << "Shape Plugin: M min/max " << mmin << "," << mmax << "\n"; #else shape.shp().skip(4*8); #endif // check if we have an index file around indexed_ = shape.has_index(); //std::string index_name(shape_name_+".index"); //std::ifstream file(index_name.c_str(),std::ios::in | std::ios::binary); //if (file) //{ // indexed_=true; // file.close(); //} //else //{ // std::clog << "### Notice: no .index file found for " + shape_name_ + ".shp, use the 'shapeindex' program to build an index for faster rendering\n"; //} #ifdef MAPNIK_DEBUG std::clog << "Shape Plugin: extent=" << extent_ << std::endl; std::clog << "Shape Plugin: file_length=" << file_length_ << std::endl; std::clog << "Shape Plugin: shape_type=" << shape_type << std::endl; #endif } std::string shape_datasource::name() { return "shape"; } int shape_datasource::type() const { return type_; } layer_descriptor shape_datasource::get_descriptor() const { if (!is_bound_) bind(); return desc_; } featureset_ptr shape_datasource::features(const query& q) const { if (!is_bound_) bind(); filter_in_box filter(q.get_bbox()); if (indexed_) { shape_->shp().seek(0); // TODO - use boost::make_shared - #760 return featureset_ptr (new shape_index_featureset<filter_in_box>(filter, *shape_, q.property_names(), desc_.get_encoding(), shape_name_, row_limit_)); } else { return boost::make_shared<shape_featureset<filter_in_box> >(filter, shape_name_, q.property_names(), desc_.get_encoding(), file_length_, row_limit_); } } featureset_ptr shape_datasource::features_at_point(coord2d const& pt) const { if (!is_bound_) bind(); filter_at_point filter(pt); // collect all attribute names std::vector<attribute_descriptor> const& desc_vector = desc_.get_descriptors(); std::vector<attribute_descriptor>::const_iterator itr = desc_vector.begin(); std::vector<attribute_descriptor>::const_iterator end = desc_vector.end(); std::set<std::string> names; while (itr != end) { names.insert(itr->get_name()); ++itr; } if (indexed_) { shape_->shp().seek(0); // TODO - use boost::make_shared - #760 return featureset_ptr (new shape_index_featureset<filter_at_point>(filter, *shape_, names, desc_.get_encoding(), shape_name_, row_limit_)); } else { return boost::make_shared<shape_featureset<filter_at_point> >(filter, shape_name_, names, desc_.get_encoding(), file_length_, row_limit_); } } box2d<double> shape_datasource::envelope() const { if (!is_bound_) bind(); return extent_; }