GeoJSON.Net/src/GeoJSON.Net/Geometry/Polygon.cs at master · deRightDirection/GeoJSON.Net · GitHub

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// --------------------------------------------------------------------------------------------------------------------

// <copyright file="Polygon.cs" company="Joerg Battermann">

// </copyright>

// <summary>

// Defines the <see cref="http://geojson.org/geojson-spec.html#polygon">Polygon</see> type.

// </summary>

// --------------------------------------------------------------------------------------------------------------------

using System;

using System.Collections.Generic;

using System.Linq;

using GeoJSON.Net.Converters;

using Newtonsoft.Json;

namespace GeoJSON.Net.Geometry

{

/// <summary>

/// Defines the <see cref="http://geojson.org/geojson-spec.html#polygon">Polygon</see> type.

/// Coordinates of a Polygon are a list of

/// <see cref="http://geojson.org/geojson-spec.html#linestring">linear rings</see>

/// coordinate arrays. The first element in the array represents the exterior ring. Any subsequent elements

/// represent interior rings (or holes).

/// </summary>

/// <seealso cref="http://geojson.org/geojson-spec.html#polygon" />

public class Polygon : GeoJSONObject, IGeometryObject

{

/// <summary>

/// Initializes a new instance of the <see cref="Polygon" /> class.

/// </summary>

/// <param name="coordinates">

/// The <see cref="http://geojson.org/geojson-spec.html#linestring">linear rings</see> with the first element

/// in the array representing the exterior ring. Any subsequent elements represent interior rings (or holes).

/// </param>

public Polygon(List<LineString> coordinates)

{

if (coordinates == null)

{

throw new ArgumentNullException("coordinates");

}

if (coordinates.Any(linearRing => !linearRing.IsLinearRing()))

{

throw new ArgumentException("All elements must be closed LineStrings with 4 or more positions" +

" (see GeoJSON spec at 'http://geojson.org/geojson-spec.html#linestring').", "coordinates");

}

Coordinates = coordinates;

Type = GeoJSONObjectType.Polygon;

}

/// <summary>

/// Gets the list of points outlining this Polygon.

/// </summary>

[JsonProperty(PropertyName = "coordinates", Required = Required.Always)]

[JsonConverter(typeof(PolygonConverter))]

public List<LineString> Coordinates { get; set; }

public override bool Equals(object obj)

{

if (ReferenceEquals(null, obj))

{

return false;

}

if (ReferenceEquals(this, obj))

{

return true;

}

if (obj.GetType() != GetType())

{

return false;

}

return Equals((Polygon)obj);

}

public override int GetHashCode()

{

return Coordinates.GetHashCode();

}

public static bool operator ==(Polygon left, Polygon right)

{

return Equals(left, right);

}

public static bool operator !=(Polygon left, Polygon right)

{

return !Equals(left, right);

}

protected bool Equals(Polygon other)

{

return base.Equals(other) && Coordinates.SequenceEqual(other.Coordinates);

}

GeoJSON.Net/src/GeoJSON.Net/Geometry/Polygon.cs at master · deRightDirection/GeoJSON.Net · GitHub

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