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//---------------------------------------------------------------------
// <copyright file="Pair.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Linq;
namespace System.Data.Common.Utils
{
internal class Pair<TFirst, TSecond> : InternalBase
{
#region Fields
private readonly TFirst first;
private readonly TSecond second;
#endregion
#region Constructor
internal Pair(TFirst first, TSecond second)
{
this.first = first;
this.second = second;
}
#endregion
#region Properties
internal TFirst First
{
get
{
return first;
}
}
internal TSecond Second
{
get
{
return second;
}
}
#endregion
#region Methods
public override int GetHashCode()
{
return (first.GetHashCode()<<5) ^ second.GetHashCode();
}
public bool Equals(Pair<TFirst, TSecond> other)
{
return first.Equals(other.first) && second.Equals(other.second);
}
public override bool Equals(object other)
{
Pair<TFirst, TSecond> otherPair = other as Pair<TFirst, TSecond>;
return (otherPair != null && Equals(otherPair));
}
#endregion
#region InternalBase
internal override void ToCompactString(StringBuilder builder)
{
builder.Append("<");
builder.Append(first.ToString());
builder.Append(", "+second.ToString());
builder.Append(">");
}
#endregion
internal class PairComparer : IEqualityComparer<Pair<TFirst, TSecond>>
{
private PairComparer() { }
internal static readonly PairComparer Instance = new PairComparer();
private static readonly EqualityComparer<TFirst> firstComparer = EqualityComparer<TFirst>.Default;
private static readonly EqualityComparer<TSecond> secondComparer = EqualityComparer<TSecond>.Default;
public bool Equals(Pair<TFirst, TSecond> x, Pair<TFirst, TSecond> y)
{
return firstComparer.Equals(x.First, y.First) && secondComparer.Equals(x.Second, y.Second);
}
public int GetHashCode(Pair<TFirst, TSecond> source)
{
return source.GetHashCode();
}
}
}
}
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