UA-.NETStandard/Libraries/Opc.Ua.Server/Fluent/FluentNodeManagerBuilderExtensions.cs

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using System;

namespace Opc.Ua.Server.Fluent
{
    /// <summary>
    /// Fluent extensions on <see cref="NodeManagerBuilder"/> that let
    /// hand-written managers express the standard
    /// <c>CreateFluentBuilder(ns).Configure(Configure).Seal()</c>
    /// pipeline as a single chained expression rather than an
    /// imperative four-step block.
    /// </summary>
    public static class FluentNodeManagerBuilderExtensions
    {
        /// <summary>
        /// Invokes the supplied <paramref name="configure"/> delegate
        /// with this <paramref name="builder"/>, returning the builder
        /// for further chaining. Equivalent to writing
        /// <c>configure(builder); return builder;</c> at the callsite
        /// but lets the caller compose the fluent pipeline without
        /// breaking the chain.
        /// </summary>
        /// <param name="builder">The fluent node-manager builder.</param>
        /// <param name="configure">
        /// The user's <c>Configure</c> partial (typically the
        /// <c>partial void Configure(INodeManagerBuilder builder)</c>
        /// method group on the manager).
        /// </param>
        /// <returns>The same <paramref name="builder"/>.</returns>
        /// <exception cref="ArgumentNullException">
        /// <paramref name="builder"/> or <paramref name="configure"/> is null.
        /// </exception>
        public static NodeManagerBuilder Configure(
            this NodeManagerBuilder builder,
            Action<INodeManagerBuilder> configure)
        {
            if (builder == null)
            {
                throw new ArgumentNullException(nameof(builder));
            }
            if (configure == null)
            {
                throw new ArgumentNullException(nameof(configure));
            }
            configure(builder);
            return builder;
        }
    }
}