public ExpressionField AddField()

in src/Epam.GraphQL/Configuration/Implementations/BaseObjectGraphTypeConfigurator.cs [157:200]
38 lines of code
4 McCabe index (conditional complexity)

        public ExpressionField<TEntity, TReturnType, TExecutionContext> AddField<TReturnType>(
            Func<IChainConfigurationContextOwner, IChainConfigurationContext> configurationContextFactory,
            string? name,
            Expression<Func<TEntity, TReturnType>> expression,
            string? deprecationReason)
        {
            MethodInfo? addFieldMethodInfo = null;
            if (typeof(TReturnType) == typeof(string))
            {
                _addExpressionStringFieldMethodInfo = ReflectionHelpers.GetMethodInfo<Func<IChainConfigurationContextOwner, IChainConfigurationContext>, string, Expression<Func<TEntity, string>>, string?, ExpressionField<TEntity, string, TExecutionContext>>(
                    AddExpressionField);

                addFieldMethodInfo = _addExpressionStringFieldMethodInfo;
            }
            else if (typeof(TReturnType).IsValueType)
            {
                var unwrappedUnderlyingType = typeof(TReturnType).UnwrapIfNullable();
                var isNullable = typeof(TReturnType) != unwrappedUnderlyingType;

                if (isNullable)
                {
                    _addExpressionNullableFieldMethodInfo ??= ReflectionHelpers.GetMethodInfo<Func<IChainConfigurationContextOwner, IChainConfigurationContext>, string?, Expression<Func<TEntity, int?>>, string?, ExpressionField<TEntity, int?, TExecutionContext>>(
                        AddExpressionField);

                    addFieldMethodInfo = _addExpressionNullableFieldMethodInfo.MakeGenericMethod(unwrappedUnderlyingType);
                }
                else
                {
                    _addExpressionFieldMethodInfo ??= ReflectionHelpers.GetMethodInfo<Func<IChainConfigurationContextOwner, IChainConfigurationContext>, string?, Expression<Func<TEntity, int>>, string?, ExpressionField<TEntity, int, TExecutionContext>>(
                        AddExpressionField);

                    addFieldMethodInfo = _addExpressionFieldMethodInfo.MakeGenericMethod(unwrappedUnderlyingType);
                }
            }
            else
            {
                _addExpressionObjectFieldMethodInfo ??= ReflectionHelpers.GetMethodInfo<Func<IChainConfigurationContextOwner, IChainConfigurationContext>, string, Expression<Func<TEntity, object>>, string?, ExpressionField<TEntity, object, TExecutionContext>>(
                    AddObjectExpressionField);

                addFieldMethodInfo = _addExpressionObjectFieldMethodInfo.MakeGenericMethod(typeof(TReturnType));
            }

            return addFieldMethodInfo.InvokeAndHoistBaseException<ExpressionField<TEntity, TReturnType, TExecutionContext>>(this, configurationContextFactory, name, expression, deprecationReason);
        }