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geometry.go
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geometry.go
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package geography
import (
"database/sql/driver"
"encoding/binary"
"strconv"
"github.com/go-courier/geography/encoding/wkb"
"github.com/go-courier/geography/encoding/wkt"
)
func ToGeometry(g Geom) Geometry {
return Geometry{Geom: g}
}
type Geometry struct {
Geom
}
func (g Geometry) ToGeom() Geom {
return g.Geom
}
func (g Geometry) MarshalWKT(w *wkt.WKTWriter) {
if wktMarshaller, ok := g.Geom.(wkt.WKTMarshaller); ok {
wktMarshaller.MarshalWKT(w)
}
}
func (g *Geometry) UnmarshalWKB(r *wkb.WKBReader, order binary.ByteOrder, tpe wkb.GeometryType) error {
switch tpe {
case wkb.PointType:
gg := Point{}
if err := gg.UnmarshalWKB(r, order, tpe); err != nil {
return err
}
g.Geom = gg
case wkb.LineStringType:
gg := LineString{}
if err := gg.UnmarshalWKB(r, order, tpe); err != nil {
return err
}
g.Geom = gg
case wkb.PolygonType:
gg := Polygon{}
if err := gg.UnmarshalWKB(r, order, tpe); err != nil {
return err
}
g.Geom = gg
case wkb.MultiPointType:
gg := MultiPoint{}
if err := gg.UnmarshalWKB(r, order, tpe); err != nil {
return err
}
g.Geom = gg
case wkb.MultiLineStringType:
gg := MultiLineString{}
if err := gg.UnmarshalWKB(r, order, tpe); err != nil {
return err
}
g.Geom = gg
case wkb.MultiPolygonType:
gg := MultiPolygon{}
if err := gg.UnmarshalWKB(r, order, tpe); err != nil {
return err
}
g.Geom = gg
}
return nil
}
func (g Geometry) DataType(driverName string) string {
return "geometry"
}
func (Geometry) ValueEx() string {
return "ST_GeomFromText(?," + strconv.FormatInt(SRS3857, 10) + ")"
}
func (g Geometry) Value() (driver.Value, error) {
return wkt.MarshalWKT(g, SRS3857), nil
}
func (g *Geometry) Scan(src interface{}) error {
return scan(src, g)
}