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convert any geometries to gdal types in geometry methods #366

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28 changes: 18 additions & 10 deletions src/geointerface.jl
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ const lookup_method = Dict{DataType,Function}(
GeoInterface.MultiLineStringTrait => createmultilinestring,
GeoInterface.PolygonTrait => createpolygon,
GeoInterface.MultiPolygonTrait => createmultipolygon,
GeoInterface.GeometryCollectionTrait => creategeomcollection,
)

let pointtypes = (wkbPoint, wkbPoint25D, wkbPointM, wkbPointZM),
Expand Down Expand Up @@ -280,18 +281,25 @@ let pointtypes = (wkbPoint, wkbPoint25D, wkbPointM, wkbPointZM),
return toWKT(geom)
end

function GeoInterface.convert(
::Type{T},
type::GeometryTraits,
geom,
) where {T<:IGeometry}
f = get(lookup_method, typeof(type), nothing)
isnothing(f) && error(
"Cannot convert an object of $(typeof(geom)) with the $(typeof(type)) trait (yet). Please report an issue.",
)
return f(GeoInterface.coordinates(geom))
function GeoInterface.convert(::Type{T}, trait::GeometryTraits, geom) where {T<:IGeometry}
f = get(lookup_method, typeof(trait), nothing)
isnothing(f) && _convert_error(geom, trait)
coords = GeoInterface.coordinates(geom)
return f(coords)
end

function GeoInterface.convert(::Type{T}, trait::GeoInterface.GeometryCollectionTrait, collection) where {T<:IGeometry}
gdal_collection = creategeomcollection()
for geom in GeoInterface.getgeom(collection)
addgeom!(gdal_collection, to_gdal(geom))
end
return gdal_collection
end

@noinline _convert_error(geom, trait) = error(
"Cannot convert an object of $(typeof(geom)) with the $(typeof(trait)) trait (yet). Please report an issue at https://github.com/yeesian/ArchGDAL.jl if you need this",
)

function GeoInterface.geomtrait(
geom::Union{map(T -> AbstractGeometry{T}, pointtypes)...},
)
Expand Down
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