/// <summary>
/// Returns the single policy in this <see cref="IPolicyWrap"/> of type <typeparamref name="TPolicy"/> matching the filter.
/// </summary>
/// <param name="policyWrap">The <see cref="IPolicyWrap"/> for which to search for the policy.</param>
/// <param name="filter">A filter to apply to any policies of type <typeparamref name="TPolicy"/> found.</param>
/// <typeparam name="TPolicy">The type of policy to return.</typeparam>
/// <returns>A matching <typeparamref name="TPolicy"/> if one is found; else null.</returns>
/// <throws>InvalidOperationException, if more than one policy of the type is found in the wrap.</throws>
public static TPolicy GetPolicy <TPolicy>(this IPolicyWrap policyWrap, Func <TPolicy, bool> filter)
{
if (filter == null)
{
throw new ArgumentNullException(nameof(filter));
}
return(policyWrap.GetPolicies().OfType <TPolicy>().SingleOrDefault(filter));
}
/// <summary>
/// Returns all the policies in this <see cref="IPolicyWrap"/> of type <typeparamref name="TPolicy"/> matching the filter, in Outer-to-Inner order.
/// </summary>
/// <param name="policyWrap">The <see cref="IPolicyWrap"/> for which to return policies.</param>
/// <param name="filter">A filter to apply to any policies of type <typeparamref name="TPolicy"/> found.</param>
/// <typeparam name="TPolicy">The type of policies to return.</typeparam>
/// <returns>An <see cref="IEnumerable{TPolicy}"/> of all the policies of the given type, matching the filter.</returns>
public static IEnumerable <TPolicy> GetPolicies <TPolicy>(this IPolicyWrap policyWrap, Func <TPolicy, bool> filter)
{
if (filter == null)
{
throw new ArgumentNullException(nameof(filter));
}
return(policyWrap.GetPolicies().OfType <TPolicy>().Where(filter));
}
/// <summary> /// Returns the single policy in this <see cref="IPolicyWrap"/> of type <typeparamref name="TPolicy"/>. /// </summary> /// <param name="policyWrap">The <see cref="IPolicyWrap"/> for which to search for the policy.</param> /// <typeparam name="TPolicy">The type of policy to return.</typeparam> /// <returns>A <typeparamref name="TPolicy"/> if one is found; else null.</returns> /// <throws>InvalidOperationException, if more than one policy of the type is found in the wrap.</throws> public static TPolicy GetPolicy <TPolicy>(this IPolicyWrap policyWrap) => policyWrap.GetPolicies().OfType <TPolicy>().SingleOrDefault();
/// <summary>
/// Returns all the policies in this <see cref="IPolicyWrap"/> of type <typeparamref name="TPolicy"/>, in Outer-to-Inner order.
/// </summary>
/// <param name="policyWrap">The <see cref="IPolicyWrap"/> for which to return policies.</param>
/// <typeparam name="TPolicy">The type of policies to return.</typeparam>
/// <returns>An <see cref="IEnumerable{TPolicy}"/> of all the policies of the given type.</returns>
public static IEnumerable <TPolicy> GetPolicies <TPolicy>(this IPolicyWrap policyWrap)
=> policyWrap.GetPolicies().OfType <TPolicy>();
/// <summary>
/// Returns all the policies in this <see cref="IPolicyWrap"/> of type <typeparamref name="TPolicy"/>, in Outer-to-Inner order.
/// </summary>
/// <param name="policyWrap">The <see cref="IPolicyWrap"/> for which to return policies.</param>
/// <typeparam name="TPolicy">The type of policies to return.</typeparam>
/// <returns>An <see cref="IEnumerable{TPolicy}"/> of all the policies of the given type.</returns>
public static IEnumerable <TPolicy> GetPolicies <TPolicy>(this IPolicyWrap policyWrap)
{
return(policyWrap.GetPolicies().OfType <TPolicy>());
}