155 lines
4.3 KiB
C++
155 lines
4.3 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include "shape.hpp"
|
|
#include "shape_featureset.hpp"
|
|
#include "shape_index_featureset.hpp"
|
|
#include "geom_util.hpp"
|
|
|
|
#include <iostream>
|
|
#include <stdexcept>
|
|
|
|
DATASOURCE_PLUGIN(shape_datasource)
|
|
|
|
shape_datasource::shape_datasource(const parameters ¶ms)
|
|
: datasource (params) ,
|
|
shape_name_(params.get("file")),
|
|
type_(datasource::Vector),
|
|
file_length_(0),
|
|
indexed_(false),
|
|
desc_(params.get("name"))
|
|
{
|
|
try
|
|
{
|
|
shape_io shape(shape_name_);
|
|
init(shape);
|
|
for (int i=0;i<shape.dbf().num_fields();++i)
|
|
{
|
|
field_descriptor const& fd=shape.dbf().descriptor(i);
|
|
std::string fld_name=fd.name_;
|
|
switch (fd.type_)
|
|
{
|
|
case 'C':
|
|
case 'D':
|
|
case 'M':
|
|
case 'L':
|
|
desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::String));
|
|
break;
|
|
case 'N':
|
|
case 'F':
|
|
{
|
|
if (fd.dec_>0)
|
|
{
|
|
desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Double,false,8));
|
|
}
|
|
else
|
|
{
|
|
desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Integer,false,4));
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
//
|
|
std::clog << "unknown type "<<fd.type_<<"\n";
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
catch (datasource_exception& ex)
|
|
{
|
|
std::clog<<ex.what()<<std::endl;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
|
|
shape_datasource::~shape_datasource()
|
|
{
|
|
}
|
|
|
|
std::string shape_datasource::name_="shape";
|
|
|
|
void shape_datasource::init(shape_io& shape)
|
|
{
|
|
//first read header from *.shp
|
|
int file_code=shape.shp().read_xdr_integer();
|
|
if (file_code!=9994)
|
|
{
|
|
//invalid
|
|
throw datasource_exception("wrong file code");
|
|
}
|
|
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("invalid version number");
|
|
}
|
|
int shape_type=shape.shp().read_ndr_integer();
|
|
shape.shp().read_envelope(extent_);
|
|
shape.shp().skip(4*8);
|
|
|
|
// check if we have an index file around
|
|
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();
|
|
}
|
|
|
|
std::clog << extent_ << std::endl;
|
|
std::clog << "file_length=" << file_length_ << std::endl;
|
|
std::clog << "shape_type=" << shape_type << std::endl;
|
|
}
|
|
|
|
int shape_datasource::type() const
|
|
{
|
|
return type_;
|
|
}
|
|
|
|
layer_descriptor const& shape_datasource::get_descriptor() const
|
|
{
|
|
return desc_;
|
|
}
|
|
|
|
std::string shape_datasource::name()
|
|
{
|
|
return name_;
|
|
}
|
|
|
|
featureset_ptr shape_datasource::features(const query& q) const
|
|
{
|
|
filter_in_box filter(q.get_bbox());
|
|
if (indexed_)
|
|
{
|
|
return featureset_ptr(new shape_index_featureset<filter_in_box>(filter,shape_name_,q.property_names()));
|
|
}
|
|
return featureset_ptr(new shape_featureset<filter_in_box>(filter,shape_name_,q.property_names(),file_length_));
|
|
}
|
|
|
|
const Envelope<double>& shape_datasource::envelope() const
|
|
{
|
|
return extent_;
|
|
}
|