43 lines
1.6 KiB
C#
43 lines
1.6 KiB
C#
using System;
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namespace Umbraco.Core.Collections
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{
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/// <summary>
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/// Represents a composite key of (int, string) for fast dictionaries.
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/// </summary>
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/// <remarks>
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/// <para>The integer part of the key must be greater than, or equal to, zero.</para>
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/// <para>The string part of the key is case-insensitive.</para>
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/// <para>Null is a valid value for both parts.</para>
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/// </remarks>
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public struct CompositeIntStringKey : IEquatable<CompositeIntStringKey>
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{
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private readonly int _key1;
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private readonly string _key2;
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/// <summary>
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/// Initializes a new instance of the <see cref="CompositeIntStringKey"/> struct.
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/// </summary>
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public CompositeIntStringKey(int? key1, string key2)
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{
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if (key1 < 0) throw new ArgumentOutOfRangeException(nameof(key1));
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_key1 = key1 ?? -1;
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_key2 = key2?.ToLowerInvariant() ?? "NULL";
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}
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public bool Equals(CompositeIntStringKey other)
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=> _key2 == other._key2 && _key1 == other._key1;
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public override bool Equals(object obj)
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=> obj is CompositeIntStringKey other && _key2 == other._key2 && _key1 == other._key1;
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public override int GetHashCode()
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=> _key2.GetHashCode() * 31 + _key1;
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public static bool operator ==(CompositeIntStringKey key1, CompositeIntStringKey key2)
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=> key1._key2 == key2._key2 && key1._key1 == key2._key1;
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public static bool operator !=(CompositeIntStringKey key1, CompositeIntStringKey key2)
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=> key1._key2 != key2._key2 || key1._key1 != key2._key1;
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}
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} |