114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
|
/* This file is part of Mapnik (c++ mapping toolkit)
|
||
|
|
* Copyright (C) 2005 Artem Pavlenko
|
||
|
|
*
|
||
|
|
* Mapnik is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version 2
|
||
|
|
* of the License, or any later version.
|
||
|
|
*
|
||
|
|
* This program 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 General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "shape.hh"
|
||
|
|
#include "shape_featureset.hh"
|
||
|
|
#include "shape_index_featureset.hh"
|
||
|
|
|
||
|
|
#include <iostream>
|
||
|
|
#include <stdexcept>
|
||
|
|
|
||
|
|
DATASOURCE_PLUGIN(shape_datasource);
|
||
|
|
|
||
|
|
shape_datasource::shape_datasource(const Parameters ¶ms)
|
||
|
|
: shape_name_(params.get("file")),
|
||
|
|
type_(datasource::Vector),
|
||
|
|
file_length_(0),
|
||
|
|
indexed_(false)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
shape_io shape(shape_name_);
|
||
|
|
init(shape);
|
||
|
|
}
|
||
|
|
catch (datasource_exception& ex)
|
||
|
|
{
|
||
|
|
std::cerr<<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::cout<<extent_<<std::endl;
|
||
|
|
std::cout<<"file_length="<<file_length_<<std::endl;
|
||
|
|
std::cout<<"shape_type="<<shape_type<<std::endl;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int shape_datasource::type() const
|
||
|
|
{
|
||
|
|
return type_;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
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_;
|
||
|
|
}
|