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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Globalization;
namespace System.Reactive
{
/// <summary>
/// Represents a value associated with time interval information.
/// The time interval can represent the time it took to produce the value, the interval relative to a previous value, the value's delivery time relative to a base, etc.
/// </summary>
/// <typeparam name="T">The type of the value being annotated with time interval information.</typeparam>
#if !NO_SERIALIZABLE
[Serializable]
#endif
public struct TimeInterval<T> : IEquatable<TimeInterval<T>>
{
private readonly TimeSpan _interval;
private readonly T _value;
/// <summary>
/// Constructs a time interval value.
/// </summary>
/// <param name="value">The value to be annotated with a time interval.</param>
/// <param name="interval">Time interval associated with the value.</param>
public TimeInterval(T value, TimeSpan interval)
{
_interval = interval;
_value = value;
}
/// <summary>
/// Gets the value.
/// </summary>
public T Value
{
get { return _value; }
}
/// <summary>
/// Gets the interval.
/// </summary>
public TimeSpan Interval
{
get { return _interval; }
}
/// <summary>
/// Determines whether the current TimeInterval<T> value has the same Value and Interval as a specified TimeInterval<T> value.
/// </summary>
/// <param name="other">An object to compare to the current TimeInterval<T> value.</param>
/// <returns>true if both TimeInterval<T> values have the same Value and Interval; otherwise, false.</returns>
public bool Equals(TimeInterval<T> other)
{
return other.Interval.Equals(Interval) && EqualityComparer<T>.Default.Equals(Value, other.Value);
}
/// <summary>
/// Determines whether the two specified TimeInterval<T> values have the same Value and Interval.
/// </summary>
/// <param name="first">The first TimeInterval<T> value to compare.</param>
/// <param name="second">The second TimeInterval<T> value to compare.</param>
/// <returns>true if the first TimeInterval<T> value has the same Value and Interval as the second TimeInterval<T> value; otherwise, false.</returns>
public static bool operator ==(TimeInterval<T> first, TimeInterval<T> second)
{
return first.Equals(second);
}
/// <summary>
/// Determines whether the two specified TimeInterval<T> values don't have the same Value and Interval.
/// </summary>
/// <param name="first">The first TimeInterval<T> value to compare.</param>
/// <param name="second">The second TimeInterval<T> value to compare.</param>
/// <returns>true if the first TimeInterval<T> value has a different Value or Interval as the second TimeInterval<T> value; otherwise, false.</returns>
public static bool operator !=(TimeInterval<T> first, TimeInterval<T> second)
{
return !first.Equals(second);
}
/// <summary>
/// Determines whether the specified System.Object is equal to the current TimeInterval<T>.
/// </summary>
/// <param name="obj">The System.Object to compare with the current TimeInterval<T>.</param>
/// <returns>true if the specified System.Object is equal to the current TimeInterval<T>; otherwise, false.</returns>
public override bool Equals(object obj)
{
if (!(obj is TimeInterval<T>))
return false;
var other = (TimeInterval<T>)obj;
return this.Equals(other);
}
/// <summary>
/// Returns the hash code for the current TimeInterval<T> value.
/// </summary>
/// <returns>A hash code for the current TimeInterval<T> value.</returns>
public override int GetHashCode()
{
var valueHashCode = Value == null ? 1963 : Value.GetHashCode();
return Interval.GetHashCode() ^ valueHashCode;
}
/// <summary>
/// Returns a string representation of the current TimeInterval<T> value.
/// </summary>
/// <returns>String representation of the current TimeInterval<T> value.</returns>
public override string ToString()
{
return String.Format(CultureInfo.CurrentCulture, "{0}@{1}", Value, Interval);
}
}
}
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