ServiceClientGenerator.GeneratorHelpers.DetermineAWSQueryTestExpression C# (CSharp) Method

        public static string DetermineAWSQueryTestExpression(Member member)
        {
            var isEC2Protocol = member.model.IsEC2Protocol;
            var testExpression = DetermineAWSQueryBaseUnmarshallName(member);
            if (member.IsList)
            {
                if (!member.Shape.IsFlattened)
                {
                    testExpression += "/";
                    if (member.Shape.ListMarshallName != null)
                        testExpression += member.Shape.ListMarshallName;
                    else
                        testExpression += "member";

                    // If the list element shape has a customization replacing it
                    // with another shape, extend the expression with any subexpression
                    // to the value member that the replaced shape has. This allows us to 
                    // handle collections of EC2's AttributeValue shape which is replaced 
                    // by a 'string' and we unmarshall the collection using the shape's 'value' 
                    // member.
                    var listShape = member.Shape.ModelListShape;
                    var substituteShapeData = member.model.Customizations.GetSubstituteShapeData(listShape.Name);
                    if (substituteShapeData != null)
                    {
                        if (substituteShapeData[CustomizationsModel.EmitFromMemberKey] != null)
                        {
                            var valueMember = (string)substituteShapeData[CustomizationsModel.EmitFromMemberKey];
                            if (isEC2Protocol)
                                testExpression += "/" + TransformUnmarshallLocationName(true, valueMember);
                            else
                                testExpression += "/" + valueMember;
                        }
                        else
                        {
                            if (listShape.ValueMarshallName != null)
                                testExpression += "/" + listShape.ValueMarshallName;
                        }
                    }
                }
                else
                {
                    testExpression = member.Shape.ListMarshallName;
                }
            }
            else if (member.IsMap)
            {
                if (!member.Shape.IsFlattened)
                    testExpression += "/entry";
            }
            else
            {
                var substituteShapeData = member.model.Customizations.GetSubstituteShapeData(member.ModelShape.Name);
                if (substituteShapeData != null && substituteShapeData[CustomizationsModel.EmitFromMemberKey] != null)
                {
                    var valueMember = (string)substituteShapeData[CustomizationsModel.EmitFromMemberKey];
                    var subMember = member.ModelShape.Members.Single(m => m.PropertyName.Equals(valueMember, StringComparison.Ordinal));

                    var subExpression = string.IsNullOrEmpty(subMember.MarshallLocationName)
                        ? subMember.MarshallName
                        : subMember.MarshallLocationName;

                    if (!string.IsNullOrEmpty(subExpression))
                        testExpression += "/" + subExpression;
                }
            }

            return testExpression;
        }