UA-.NETStandard/tools/Opc.Ua.SourceGeneration.Core/Generators/MethodDesignArgumentResolver.cs

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 *
 * OPC Foundation MIT License 1.00
 *
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 * obtaining a copy of this software and associated documentation
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using System;
using Opc.Ua.Schema.Model;

namespace Opc.Ua.SourceGeneration
{
    /// <summary>
    /// Resolves the effective method argument metadata used by generators.
    /// </summary>
    internal static class MethodDesignArgumentResolver
    {
        /// <summary>
        /// Resolves the effective input arguments for a method design.
        /// </summary>
        public static Parameter[] ResolveMethodInputs(MethodDesign method)
        {
            if (method == null)
            {
                throw new ArgumentNullException(nameof(method));
            }

            return ResolveArguments(
                method.InputArguments,
                method.MethodDeclarationNode?.InputArguments,
                method.MethodType?.InputArguments);
        }

        /// <summary>
        /// Resolves the effective output arguments for a method design.
        /// </summary>
        public static Parameter[] ResolveMethodOutputs(MethodDesign method)
        {
            if (method == null)
            {
                throw new ArgumentNullException(nameof(method));
            }

            return ResolveArguments(
                method.OutputArguments,
                method.MethodDeclarationNode?.OutputArguments,
                method.MethodType?.OutputArguments);
        }

        private static Parameter[] ResolveArguments(
            Parameter[] methodArguments,
            Parameter[] declarationArguments,
            Parameter[] methodTypeArguments)
        {
            if (methodArguments is { Length: > 0 })
            {
                return methodArguments;
            }

            if (declarationArguments is { Length: > 0 })
            {
                return declarationArguments;
            }

            if (methodTypeArguments is { Length: > 0 })
            {
                return methodTypeArguments;
            }

            return [];
        }
    }
}