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"""pydantic models for GeoJSON Feature objects."""
from typing import Any, Dict, Generic, Iterator, List, Literal, Optional, TypeVar, Union
from pydantic import BaseModel, Field, StrictInt, StrictStr, field_validator
from geojson_pydantic.base import _GeoJsonBase
from geojson_pydantic.geometries import Geometry
Props = TypeVar("Props", bound=Union[Dict[str, Any], BaseModel])
Geom = TypeVar("Geom", bound=Geometry)
class Feature(_GeoJsonBase, Generic[Geom, Props]):
"""Feature Model"""
type: Literal["Feature"]
geometry: Union[Geom, None] = Field(...)
properties: Union[Props, None] = Field(...)
id: Optional[Union[StrictInt, StrictStr]] = None
__geojson_exclude_if_none__ = {"bbox", "id"}
@field_validator("geometry", mode="before")
def set_geometry(cls, geometry: Any) -> Any:
"""set geometry from geo interface or input"""
if hasattr(geometry, "__geo_interface__"):
return geometry.__geo_interface__
return geometry
Feat = TypeVar("Feat", bound=Feature)
class FeatureCollection(_GeoJsonBase, Generic[Feat]):
"""FeatureCollection Model"""
type: Literal["FeatureCollection"]
features: List[Feat]
def iter(self) -> Iterator[Feat]:
"""iterate over features"""
return iter(self.features)
@property
def length(self) -> int:
"""return features length"""
return len(self.features)
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