iframe-proxy | Sunbelt Computer Software

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﻿// Copyright © Joerg Battermann 2014, Matt Hunt 2017
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using GeoJSON.Net.Converters;
using Newtonsoft.Json;
namespace GeoJSON.Net.Geometry
    /// <summary>
    /// Defines the MultiPolygon type.
    /// </summary>
    /// <remarks>
    /// See https://tools.ietf.org/html/rfc7946#section-3.1.7
    /// </remarks>
    public class MultiPolygon : GeoJSONObject, IGeometryObject, IEqualityComparer<MultiPolygon>, IEquatable<MultiPolygon>
        /// <summary>
        /// Initializes a new instance of the <see cref="MultiPolygon" /> class.
        /// </summary>
        /// <param name="polygons">The polygons contained in this MultiPolygon.</param>
        public MultiPolygon(IEnumerable<Polygon> polygons)
            Coordinates = new ReadOnlyCollection<Polygon>(
                polygons?.ToArray() ?? throw new ArgumentNullException(nameof(polygons)));
        /// <summary>
        /// Initializes a new <see cref="MultiPolygon" /> from a 4-d array of <see cref="double" />s
        /// that matches the "coordinates" field in the JSON representation.
        /// </summary>
        [JsonConstructor]
        public MultiPolygon(IEnumerable<IEnumerable<IEnumerable<IEnumerable<double>>>> coordinates)
            : this(coordinates?.Select(polygon => new Polygon(polygon))
                   ?? throw new ArgumentNullException(nameof(coordinates)))
        public override GeoJSONObjectType Type => GeoJSONObjectType.MultiPolygon;
        /// <summary>
        /// The list of Polygons enclosed in this <see cref="MultiPolygon"/>.
        /// </summary>
        [JsonProperty("coordinates", Required = Required.Always)]
        [JsonConverter(typeof(PolygonEnumerableConverter))]
        public ReadOnlyCollection<Polygon> Coordinates { get; }
        #region IEqualityComparer, IEquatable
        /// <summary>
        /// Determines whether the specified object is equal to the current object
        /// </summary>
        public override bool Equals(object obj)
            return Equals(this, obj as MultiPolygon);
        /// <summary>
        /// Determines whether the specified object is equal to the current object
        /// </summary>
        public bool Equals(MultiPolygon other)
            return Equals(this, other);
        /// <summary>
        /// Determines whether the specified object instances are considered equal
        /// </summary>
        public bool Equals(MultiPolygon left, MultiPolygon right)
            if (base.Equals(left, right))
                return left.Coordinates.SequenceEqual(right.Coordinates);
            return false;
        /// <summary>
        /// Determines whether the specified object instances are considered equal
        /// </summary>
        public static bool operator ==(MultiPolygon left, MultiPolygon right)
            if (ReferenceEquals(left, right))
                return true;
            if (ReferenceEquals(null, right))
                return false;
            return left != null && left.Equals(right);
        /// <summary>
        /// Determines whether the specified object instances are not considered equal
        /// </summary>
        public static bool operator !=(MultiPolygon left, MultiPolygon right)
            return !(left == right);
        /// <summary>
        /// Returns the hash code for this instance
        /// </summary>
        public override int GetHashCode()
            int hash = base.GetHashCode();
            foreach (var item in Coordinates)
                hash = (hash * 397) ^ item.GetHashCode();
            return hash;
        /// <summary>
        /// Returns the hash code for the specified object
        /// </summary>
        public int GetHashCode(MultiPolygon other)
            return other.GetHashCode();
        #endregion
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