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use super::mapping::{
GeoShapeFieldType,
GeoShapeMapping,
};
use geojson::Geometry;
use serde::{
Deserialize,
Deserializer,
Serialize,
Serializer,
};
use std::borrow::Borrow;
use std::marker::PhantomData;
#[derive(Debug, Clone, PartialEq)]
pub struct GeoShape<TMapping>
where
TMapping: GeoShapeMapping,
{
value: Geometry,
_m: PhantomData<TMapping>,
}
impl<TMapping> GeoShape<TMapping>
where
TMapping: GeoShapeMapping,
{
pub fn new<I>(geo: I) -> GeoShape<TMapping>
where
I: Into<Geometry>,
{
GeoShape {
value: geo.into(),
_m: PhantomData,
}
}
pub fn remap<TNewMapping>(shape: GeoShape<TMapping>) -> GeoShape<TNewMapping>
where
TNewMapping: GeoShapeMapping,
{
GeoShape::new(shape.value)
}
}
impl<TMapping> GeoShapeFieldType<TMapping> for GeoShape<TMapping> where TMapping: GeoShapeMapping {}
impl_mapping_type!(Geometry, GeoShape, GeoShapeMapping);
impl<TMapping> Serialize for GeoShape<TMapping>
where
TMapping: GeoShapeMapping,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
self.value.serialize(serializer)
}
}
impl<'de, TMapping> Deserialize<'de> for GeoShape<TMapping>
where
TMapping: GeoShapeMapping,
{
fn deserialize<D>(deserializer: D) -> Result<GeoShape<TMapping>, D::Error>
where
D: Deserializer<'de>,
{
let t = try!(Geometry::deserialize(deserializer));
Ok(GeoShape::new(t))
}
}
#[cfg(test)]
mod tests {
use serde_json;
use geojson::{
Geometry,
Value,
};
use prelude::*;
#[derive(Default)]
struct MyGeoShapeMapping;
impl GeoShapeMapping for MyGeoShapeMapping {}
#[test]
fn can_change_geo_shape_mapping() {
fn takes_custom_mapping(_: GeoShape<MyGeoShapeMapping>) -> bool {
true
}
let point: GeoShape<DefaultGeoShapeMapping> =
GeoShape::new(Geometry::new(Value::Point(vec![1.0, 1.0])));
assert!(takes_custom_mapping(GeoShape::remap(point)));
}
#[test]
fn serialise_elastic_geo_shape() {
let shape =
GeoShape::<DefaultGeoShapeMapping>::new(Geometry::new(Value::Point(vec![1.0, 1.0])));
let ser = serde_json::to_string(&shape).unwrap();
assert_eq!(
json_str!({
"coordinates": [ 1.0, 1.0 ],
"type": "Point"
}),
ser
);
}
#[test]
fn deserialise_elastic_geo_shape() {
let shape: GeoShape<DefaultGeoShapeMapping> = serde_json::from_str(&json_str!({
"coordinates": [ 1, 1 ],
"type": "Point"
}))
.unwrap();
assert_eq!(Geometry::new(Value::Point(vec![1.0, 1.0])), *shape);
}
}