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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;
namespace System.Reactive
{
/// <summary>
/// Represents a .NET event invocation consisting of the weakly typed object that raised the event and the data that was generated by the event.
/// </summary>
/// <typeparam name="TEventArgs">The type of the event data generated by the event.</typeparam>
public class EventPattern<TEventArgs> : EventPattern<object, TEventArgs>
#if !NO_EVENTARGS_CONSTRAINT
where TEventArgs : EventArgs
#endif
{
/// <summary>
/// Creates a new data representation instance of a .NET event invocation with the given sender and event data.
/// </summary>
/// <param name="sender">The sender object that raised the event.</param>
/// <param name="e">The event data that was generated by the event.</param>
public EventPattern(object sender, TEventArgs e)
: base(sender, e)
{
}
}
/// <summary>
/// Represents a .NET event invocation consisting of the strongly typed object that raised the event and the data that was generated by the event.
/// </summary>
/// <typeparam name="TSender">The type of the sender that raised the event.</typeparam>
/// <typeparam name="TEventArgs">The type of the event data generated by the event.</typeparam>
public class EventPattern<TSender, TEventArgs> : IEquatable<EventPattern<TSender, TEventArgs>>, IEventPattern<TSender, TEventArgs>
#if !NO_EVENTARGS_CONSTRAINT
where TEventArgs : EventArgs
#endif
{
/// <summary>
/// Creates a new data representation instance of a .NET event invocation with the given sender and event data.
/// </summary>
/// <param name="sender">The sender object that raised the event.</param>
/// <param name="e">The event data that was generated by the event.</param>
public EventPattern(TSender sender, TEventArgs e)
{
Sender = sender;
EventArgs = e;
}
/// <summary>
/// Gets the sender object that raised the event.
/// </summary>
public TSender Sender { get; private set; }
/// <summary>
/// Gets the event data that was generated by the event.
/// </summary>
public TEventArgs EventArgs { get; private set; }
/// <summary>
/// Determines whether the current EventPattern<TSender, TEventArgs> object represents the same event as a specified EventPattern<TSender, TEventArgs> object.
/// </summary>
/// <param name="other">An object to compare to the current EventPattern<TSender, TEventArgs> object.</param>
/// <returns>true if both EventPattern<TSender, TEventArgs> objects represent the same event; otherwise, false.</returns>
public bool Equals(EventPattern<TSender, TEventArgs> other)
{
if (object.ReferenceEquals(null, other))
return false;
if (object.ReferenceEquals(this, other))
return true;
return EqualityComparer<TSender>.Default.Equals(Sender, other.Sender) && EqualityComparer<TEventArgs>.Default.Equals(EventArgs, other.EventArgs);
}
/// <summary>
/// Determines whether the specified System.Object is equal to the current EventPattern<TSender, TEventArgs>.
/// </summary>
/// <param name="obj">The System.Object to compare with the current EventPattern<TSender, TEventArgs>.</param>
/// <returns>true if the specified System.Object is equal to the current EventPattern<TSender, TEventArgs>; otherwise, false.</returns>
public override bool Equals(object obj)
{
return Equals(obj as EventPattern<TSender, TEventArgs>);
}
/// <summary>
/// Returns the hash code for the current EventPattern<TSender, TEventArgs> instance.
/// </summary>
/// <returns>A hash code for the current EventPattern<TSender, TEventArgs> instance.</returns>
public override int GetHashCode()
{
var x = EqualityComparer<TSender>.Default.GetHashCode(Sender);
var y = EqualityComparer<TEventArgs>.Default.GetHashCode(EventArgs);
return (x << 5) + (x ^ y);
}
/// <summary>
/// Determines whether two specified EventPattern<TSender, TEventArgs> objects represent the same event.
/// </summary>
/// <param name="first">The first EventPattern<TSender, TEventArgs> to compare, or null.</param>
/// <param name="second">The second EventPattern<TSender, TEventArgs> to compare, or null.</param>
/// <returns>true if both EventPattern<TSender, TEventArgs> objects represent the same event; otherwise, false.</returns>
public static bool operator ==(EventPattern<TSender, TEventArgs> first, EventPattern<TSender, TEventArgs> second)
{
return object.Equals(first, second);
}
/// <summary>
/// Determines whether two specified EventPattern<TSender, TEventArgs> objects represent a different event.
/// </summary>
/// <param name="first">The first EventPattern<TSender, TEventArgs> to compare, or null.</param>
/// <param name="second">The second EventPattern<TSender, TEventArgs> to compare, or null.</param>
/// <returns>true if both EventPattern<TSender, TEventArgs> objects don't represent the same event; otherwise, false.</returns>
public static bool operator !=(EventPattern<TSender, TEventArgs> first, EventPattern<TSender, TEventArgs> second)
{
return !object.Equals(first, second);
}
}
}
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