/// <summary>
/// Adds a handler that is called if the item being matched is of type <paramref name="handlesType"/>
/// and <paramref name="shouldHandle"/>, if it has been specified, returns <c>true</c>.
/// <remarks>Note that if a previous added handler handled the item, this <paramref name="handler"/> will not be invoked.</remarks>
/// </summary>
/// <param name="handlesType">The type that it must match in order for <paramref name="handler"/> to be called.</param>
/// <param name="handler">The handler that is invoked when everything matches.</param>
/// <param name="shouldHandle">An optional predicate to test if the item matches. If it returns <c>true</c> the <paramref name="handler"/> is invoked.</param>
/// <exception cref="ArgumentException">
/// This exception is thrown if the given <paramref name="handler"/> cannot handle the given <paramref name="handlesType"/>.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// This exception is thrown if the current state is unknown.
/// </exception>
/// <exception cref="InvalidOperationException">
/// This exception is thrown if a handler that catches all messages has been added or a partial action has already been built.
/// </exception>
public void Match(Type handlesType, Action <TItem> handler, Predicate <TItem> shouldHandle = null)
{
EnsureCanAdd();
EnsureCanHandleType(handlesType);
AddHandler(handlesType, PredicateAndHandler.CreateAction(handler, shouldHandle, true));
if (handlesType == _itemType && shouldHandle == null)
{
_state = State.MatchAnyAdded;
}
}
/// <summary>
/// Adds a handler that is called if the item being matched is of type <typeparamref name="T"/>
/// and <paramref name="shouldHandle"/>, if it has been specified, returns <c>true</c>.
/// <remarks>Note that if a previous added handler handled the item, this <paramref name="handler"/> will not be invoked.</remarks>
/// </summary>
/// <typeparam name="T">The type that it must match in order for <paramref name="handler"/> to be called.</typeparam>
/// <param name="handler">The handler that is invoked when everything matches.</param>
/// <param name="shouldHandle">An optional predicate to test if the item matches. If it returns <c>true</c> the <paramref name="handler"/> is invoked.</param>
/// <exception cref="InvalidOperationException">
/// This exception is thrown if a handler that catches all messages has been added or a partial action has already been built.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// This exception is thrown if the current state is unknown.
/// </exception>
public void Match <T>(Action <T> handler, Predicate <T> shouldHandle = null) where T : TItem
{
EnsureCanAdd();
var handlesType = typeof(T);
AddHandler(handlesType, PredicateAndHandler.CreateAction(handler, shouldHandle));
if (handlesType == _itemType && shouldHandle == null)
{
_state = State.MatchAnyAdded;
}
}