shape_datasource::shape_datasource(const parameters ¶ms)
: 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,String));
break;
case 'N':
case 'F':
{
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:
//
std::clog << "unknown type "<<fd.type_<<"\n";
break;
}
}
}
catch (datasource_exception& ex)
{
std::clog<<ex.what()<<std::endl;
throw;
}
}
/// Convenience function to create attribute descriptors with less typing.
static attribute_descriptor
desc(std::string const& name, std::string const& class_name) {
return attribute_descriptor(name, class_name);
}