Add MappedSourceType to the list

BlueWest.Data/Finance/Currency/Country.cs

@@ -5,7 +5,7 @@ using MapTo;
 namespace BlueWest.Data
 {
    
-    [MapFrom(typeof(CountryUpdate))]
+    [MapFrom(new [] {typeof(CountryUpdate), typeof(CountryCreate)})]
     public partial class Country
     {
         // ISO 3166-1 numeric code

include/BlueWest.MapTo/src/BlueWest.MapTo/Extensions/CommonExtensions.cs

@@ -30,6 +30,7 @@ namespace MapTo.Extensions
 
         internal static SourceBuilder WriteModelInfo(this SourceBuilder builder, MappingModel model)
         {
+            var targetSourceType = model.MappedSourceTypes[0];
             return builder
                         .WriteLine()
                         .WriteComment($" IsTypeUpdatable                {model.IsTypeUpdatable}")
@@ -38,9 +39,9 @@ namespace MapTo.Extensions
                         .WriteComment($" Options                        {model.Options.ToString()}")
                         .WriteComment($" Type                           {model.Type}")
                         .WriteComment($" TypeIdentifierName             {model.TypeIdentifierName}")
-                        .WriteComment($" SourceNamespace                {model.SourceNamespace}")
+                        .WriteComment($" SourceNamespace                {targetSourceType.SourceNamespace}")
-                        .WriteComment($" SourceTypeFullName             {model.SourceTypeFullName}")
+                        .WriteComment($" SourceTypeFullName             {targetSourceType.SourceTypeFullName}")
-                        .WriteComment($" SourceTypeIdentifierName       {model.SourceTypeIdentifierName}");
+                        .WriteComment($" SourceTypeIdentifierName       {targetSourceType.SourceTypeIdentifierName}");
 
         }
 

include/BlueWest.MapTo/src/BlueWest.MapTo/Extensions/CommonSource.cs

@@ -15,6 +15,8 @@ namespace MapTo.Extensions
         {
             const bool writeDebugInfo = true;
 
+            var targetSourceType = model.MappedSourceTypes[0];
+
             using var builder = new SourceBuilder()
                 .WriteLine(GeneratedFilesHeader)
                 .WriteNullableContextOptionIf(model.Options.SupportNullableReferenceTypes)
@@ -31,16 +33,16 @@ namespace MapTo.Extensions
                     .WriteLine()
                     .WriteComment("Type properties")
                     .WriteComment()
-                    .WriteMappedProperties(model.TypeProperties)
+                    .WriteMappedProperties(targetSourceType.TypeProperties)
                     .WriteLine()
                     .WriteComment("Source properties")
                     .WriteLine()
                     .WriteComment("Type fields")
                     .WriteComment()
-                    .WriteMappedProperties(model.TypeFields)
+                    .WriteMappedProperties(targetSourceType.TypeFields)
                     .WriteLine()
                     .WriteComment("Source fields")
-                    .WriteMappedProperties(model.SourceFields)
+                    .WriteMappedProperties(targetSourceType.SourceFields)
                     .WriteLine();
 
             builder
@@ -52,8 +54,8 @@ namespace MapTo.Extensions
                 .GeneratePublicConstructor(model);
 
             if (model.IsJsonExtension) builder.WriteToJsonMethod(model);
-            if (model.IsTypeUpdatable && model.TypeProperties.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
+            if (model.IsTypeUpdatable && targetSourceType.TypeProperties.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
-            if (model.IsTypeUpdatable && model.TypeFields.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
+            if (model.IsTypeUpdatable && targetSourceType.TypeFields.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
 
             builder
                 .WriteLine()
@@ -68,7 +70,8 @@ namespace MapTo.Extensions
 
         private static SourceBuilder GeneratePublicConstructor(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            var targetSourceType = model.MappedSourceTypes[0];
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
             const string mappingContextParameterName = "context";
 
             var baseConstructor = /*model.HasMappedBaseClass ? $" : base({mappingContextParameterName}, {sourceClassParameterName})" :*/ string.Empty;
@@ -77,9 +80,9 @@ namespace MapTo.Extensions
 
             var otherProperties = new List<MappedMember>();
 
-            foreach (var property in model.TypeProperties)
+            foreach (var property in targetSourceType.TypeProperties)
             {
-                if (!model.SourceProperties.IsMappedProperty(property))
+                if (!targetSourceType.SourceProperties.IsMappedProperty(property))
                 {
                     stringBuilder.Append(", ");
                     stringBuilder.Append($"{property.FullyQualifiedType} {property.SourcePropertyName.ToCamelCase()}");
@@ -87,9 +90,9 @@ namespace MapTo.Extensions
                 }
             }
 
-            foreach (var property in model.TypeFields)
+            foreach (var property in targetSourceType.TypeFields)
             {
-                if (!model.SourceFields.IsMappedProperty(property))
+                if (!targetSourceType.SourceFields.IsMappedProperty(property))
                 {
                     stringBuilder.Append(", ");
                     stringBuilder.Append($"{property.FullyQualifiedType} {property.SourcePropertyName.ToCamelCase()}");
@@ -101,7 +104,7 @@ namespace MapTo.Extensions
             var readOnlyPropertiesArguments = stringBuilder.ToString();
 
             builder
-                .WriteLine($"public {model.TypeIdentifierName}({model.SourceType} {sourceClassParameterName}{readOnlyPropertiesArguments}){baseConstructor}")
+                .WriteLine($"public {model.TypeIdentifierName}({targetSourceType.SourceType} {sourceClassParameterName}{readOnlyPropertiesArguments}){baseConstructor}")
                 .WriteOpeningBracket()
                 .WriteAssignmentMethod(model, otherProperties.ToArray().ToImmutableArray(), sourceClassParameterName, mappingContextParameterName, false);
 
@@ -128,7 +131,8 @@ namespace MapTo.Extensions
                 .WriteLine("var stringBuilder = new System.Text.StringBuilder();")
                 .WriteLine(GetStringBuilderAppendNoInterpolation("{"));
 
-            foreach (var property in model.TypeProperties)
+            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var property in targetSourceType.TypeProperties)
             {
                 if (!property.isEnumerable)
                     HandlePropertyEnumerable(builder, property);
@@ -137,7 +141,7 @@ namespace MapTo.Extensions
                     builder = WriteJsonField(builder, property);
                 }
             }
-            foreach (var property in model.TypeFields)
+            foreach (var property in targetSourceType.TypeFields)
             {
                 if (!property.isEnumerable)
                     HandleFieldEnumerable(builder, property);
@@ -227,8 +231,9 @@ namespace MapTo.Extensions
         private static SourceBuilder WriteAssignmentMethod(this SourceBuilder builder, MappingModel model, System.Collections.Immutable.ImmutableArray<MappedMember>? otherProperties,
             string? sourceClassParameterName, string mappingContextParameterName, bool fromUpdate)
         {
+            var targetSourceType = model.MappedSourceTypes[0];
 
-            foreach (var property in model.SourceProperties)
+            foreach (var property in targetSourceType.SourceProperties)
             {
                 if (property.isReadOnly && fromUpdate) continue;
 
@@ -236,7 +241,7 @@ namespace MapTo.Extensions
 
             }
 
-            foreach (var property in model.SourceFields)
+            foreach (var property in targetSourceType.SourceFields)
             {
                 if (property.isReadOnly && fromUpdate) continue;
 
@@ -261,11 +266,12 @@ namespace MapTo.Extensions
 
         private static SourceBuilder GenerateUpdateMethod(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            var targetSourceType = model.MappedSourceTypes[0];
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
             builder
                .GenerateUpdaterMethodsXmlDocs(model, sourceClassParameterName)
-               .WriteLine($"public void Update({model.SourceType} {sourceClassParameterName})")
+               .WriteLine($"public void Update({targetSourceType.SourceType} {sourceClassParameterName})")
                .WriteOpeningBracket()
                .WriteAssignmentMethod(model, null, sourceClassParameterName, "context", true)
                .WriteClosingBracket();
@@ -280,21 +286,25 @@ namespace MapTo.Extensions
                 return builder;
             }
 
+            var targetSourceType = model.MappedSourceTypes[0];
+
             return builder
                 .WriteLine("/// <summary>")
                 .WriteLine($"/// Updates <see cref=\"{model.TypeIdentifierName}\"/> and sets its participating properties")
                 .WriteLine($"/// using the property values from <paramref name=\"{sourceClassParameterName}\"/>.")
                 .WriteLine("/// </summary>")
-                .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{model.SourceType}\"/> to use as source.</param>");
+                .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{targetSourceType.SourceType}\"/> to use as source.</param>");
         }
         
         private static SourceBuilder GenerateEnumerableJsonSourceTypeExtensionMethod(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            var targetSourceType = model.MappedSourceTypes[0];
+
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
             return builder
                 .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
-                .WriteLine($"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static string ToJson(this IEnumerable<{model.SourceType}{model.Options.NullableReferenceSyntax}> {sourceClassParameterName}List)")
+                .WriteLine($"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static string ToJson(this IEnumerable<{targetSourceType.SourceType}{model.Options.NullableReferenceSyntax}> {sourceClassParameterName}List)")
                 .WriteOpeningBracket()
                 .WriteLine($"return {sourceClassParameterName} == null ? null : new {model.TypeIdentifierName}({sourceClassParameterName});")
                 .WriteClosingBracket();

include/BlueWest.MapTo/src/BlueWest.MapTo/MappingContext.cs

@@ -504,21 +504,38 @@ namespace MapTo
                 return null;
             }
             
-            var sourceTypeSymbol = sourceTypeSymbols[0];
-            
-            // Pick first one to avoid errors. TODO: Make possible to use different source types
-
-            _ignoredNamespaces.Add(sourceTypeSymbol.ContainingNamespace.ToDisplayParts().First());
             
             var typeIdentifierName = TypeSyntax.GetIdentifierName();
-            var sourceTypeIdentifierName = sourceTypeSymbol.Name;
             var isTypeInheritFromMappedBaseClass = IsTypeInheritFromMappedBaseClass(semanticModel);
             var isTypeUpdatable = false; //IsTypeUpdatable();
             var hasJsonExtension = false; // HasJsonExtension();
-            var shouldGenerateSecondaryConstructor = ShouldGenerateSecondaryConstructor(semanticModel, sourceTypeSymbol);
 
-            var mappedProperties = GetSourceMappedProperties(typeSymbol, sourceTypeSymbol, isTypeInheritFromMappedBaseClass);
+            List<MappedSourceType> mappedSourceTypes = new List<MappedSourceType>();
-            var mappedFields = GetSourceMappedFields(typeSymbol, sourceTypeSymbol, isTypeInheritFromMappedBaseClass);
+            
+            foreach (var sourceTypeSymbol in sourceTypeSymbols)
+            {
+                _ignoredNamespaces.Add(sourceTypeSymbol.ContainingNamespace.ToDisplayParts().First());
+                var sourceTypeIdentifierName = sourceTypeSymbol.Name;
+                var shouldGenerateSecondaryConstructor = ShouldGenerateSecondaryConstructor(semanticModel, sourceTypeSymbol);
+                var mappedProperties = GetSourceMappedProperties(typeSymbol, sourceTypeSymbol, isTypeInheritFromMappedBaseClass);
+                var mappedFields = GetSourceMappedFields(typeSymbol, sourceTypeSymbol, isTypeInheritFromMappedBaseClass);
+                AddUsingIfRequired(mappedProperties.Any(p => p.IsEnumerable), "System.Linq");
+                var allProperties = GetTypeMappedProperties(sourceTypeSymbol, typeSymbol , isTypeInheritFromMappedBaseClass);
+                var allFields = GetTypeMappedFields(sourceTypeSymbol, typeSymbol, isTypeInheritFromMappedBaseClass);
+                
+                mappedSourceTypes.Add(new MappedSourceType(
+                    sourceTypeSymbol.ContainingNamespace.ToDisplayString(), 
+                    sourceTypeIdentifierName, 
+                    sourceTypeSymbol.ToDisplayString(),
+                    mappedProperties, mappedFields, allProperties, allFields, shouldGenerateSecondaryConstructor));
+            }
+
+            //var sourceTypeSymbol = sourceTypeSymbols[0];
+            
+            // Pick first one to avoid errors. TODO: Make possible to use different source types
+
+
+
 
             /*if (!mappedProperties.Any())
             {
@@ -526,29 +543,17 @@ namespace MapTo
                 return null;
             }*/
             
-            AddUsingIfRequired(mappedProperties.Any(p => p.IsEnumerable), "System.Linq");
-
-            var allProperties = GetTypeMappedProperties(sourceTypeSymbol, typeSymbol , isTypeInheritFromMappedBaseClass);
-            var allFields = GetTypeMappedFields(sourceTypeSymbol, typeSymbol, isTypeInheritFromMappedBaseClass);
-
             return new MappingModel(
                 SourceGenerationOptions,
                 TypeSyntax.GetNamespace(),
                 TypeSyntax.Modifiers,
                 TypeSyntax.Keyword.Text,
                 typeIdentifierName,
-                sourceTypeSymbol.ContainingNamespace.ToDisplayString(),
-                sourceTypeIdentifierName,
-                sourceTypeSymbol.ToDisplayString(),
                 isTypeUpdatable,
                 hasJsonExtension,
-                mappedProperties,
+                mappedSourceTypes.ToImmutableArray(),
-                allProperties,
-                mappedFields,
-                allFields,
                 isTypeInheritFromMappedBaseClass,
-                Usings,
+                Usings);
-                shouldGenerateSecondaryConstructor);
         }
 
        

include/BlueWest.MapTo/src/BlueWest.MapTo/Models.cs

@@ -39,29 +39,35 @@ namespace MapTo
         public bool IsEnumerable => EnumerableTypeArgument is not null;
     }
 
-    internal record MappingModel (
+    internal record MappedSourceType
-        SourceGenerationOptions Options,
+    (
-        string? Namespace,
-        SyntaxTokenList Modifiers,
-        string Type,
-        string TypeIdentifierName,
         string SourceNamespace,
         string SourceTypeIdentifierName,
         string SourceTypeFullName,
-        bool IsTypeUpdatable,
-        bool IsJsonExtension,
         ImmutableArray<MappedMember> SourceProperties,
-        ImmutableArray<MappedMember> TypeProperties,
         ImmutableArray<MappedMember> SourceFields,
+        ImmutableArray<MappedMember> TypeProperties,
         ImmutableArray<MappedMember> TypeFields,
-        bool HasMappedBaseClass,
-        ImmutableArray<string> Usings,
         bool GenerateSecondaryConstructor
     )
     {
         public string SourceType => SourceTypeFullName;
     }
 
+
+    internal record MappingModel(
+        SourceGenerationOptions Options,
+        string? Namespace,
+        SyntaxTokenList Modifiers,
+        string Type,
+        string TypeIdentifierName,
+        bool IsTypeUpdatable,
+        bool IsJsonExtension,
+        ImmutableArray<MappedSourceType> MappedSourceTypes,
+        bool HasMappedBaseClass,
+        ImmutableArray<string> Usings
+    );
+
     internal record SourceGenerationOptions(
         AccessModifier ConstructorAccessModifier,
         AccessModifier GeneratedMethodsAccessModifier,

include/BlueWest.MapTo/src/BlueWest.MapTo/Sources/MapRecordSource.cs

@@ -22,8 +22,10 @@ namespace MapTo.Sources
                 .WriteLine($"partial record {model.TypeIdentifierName}")
                 .WriteOpeningBracket();
 
+            var targetSourceType = model.MappedSourceTypes[0];
+
             // Class body
-            if (model.GenerateSecondaryConstructor)
+            if (targetSourceType.GenerateSecondaryConstructor)
             {
                 builder
                     .GenerateSecondaryConstructor(model)
@@ -52,7 +54,9 @@ namespace MapTo.Sources
 
         private static SourceBuilder GenerateSecondaryConstructor(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            // grab first data from array
+            var targetSourceType = model.MappedSourceTypes[0];
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
             if (model.Options.GenerateXmlDocument)
             {
@@ -65,17 +69,19 @@ namespace MapTo.Sources
             }
 
             return builder
-                .WriteLine($"{model.Options.ConstructorAccessModifier.ToLowercaseString()} {model.TypeIdentifierName}({model.SourceType} {sourceClassParameterName})")
+                .WriteLine($"{model.Options.ConstructorAccessModifier.ToLowercaseString()} {model.TypeIdentifierName}({targetSourceType.SourceType} {sourceClassParameterName})")
                 .WriteLine($"    : this(new {MappingContextSource.ClassName}(), {sourceClassParameterName}) {{ }}");
         }
 
         private static SourceBuilder GeneratePrivateConstructor(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            var targetSourceType = model.MappedSourceTypes[0];
+
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
             const string mappingContextParameterName = "context";
 
             builder
-                .WriteLine($"private protected {model.TypeIdentifierName}({MappingContextSource.ClassName} {mappingContextParameterName}, {model.SourceType} {sourceClassParameterName})")
+                .WriteLine($"private protected {model.TypeIdentifierName}({MappingContextSource.ClassName} {mappingContextParameterName}, {targetSourceType.SourceType} {sourceClassParameterName})")
                 .Indent()
                 .Write(": this(").
 
@@ -96,9 +102,11 @@ namespace MapTo.Sources
         private static SourceBuilder WriteProperties(this SourceBuilder builder, MappingModel model, string sourceClassParameterName,
             string mappingContextParameterName)
         {
-            for (var i = 0; i < model.SourceProperties.Length; i++)
+            var targetSourceType = model.MappedSourceTypes[0];
+
+            for (var i = 0; i < targetSourceType.SourceProperties.Length; i++)
             {
-                var property = model.SourceProperties[i];
+                var property = targetSourceType.SourceProperties[i];
                 if (property.TypeConverter is null)
                 {
                     if (property.IsEnumerable)
@@ -123,7 +131,7 @@ namespace MapTo.Sources
                         $"{property.Name}: new {property.TypeConverter}().Convert({sourceClassParameterName}.{property.SourcePropertyName}, {parameters})");
                 }
 
-                if (i < model.SourceProperties.Length - 1)
+                if (i < targetSourceType.SourceProperties.Length - 1)
                 {
                     builder.Write(", ");
                 }
@@ -134,16 +142,17 @@ namespace MapTo.Sources
 
         private static SourceBuilder GenerateFactoryMethod(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            var targetSourceType = model.MappedSourceTypes[0];
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
             return builder
                 .GenerateConvertorMethodsXmlDocs(model, sourceClassParameterName)
                 .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
                 .WriteLine(
-                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} From({model.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
+                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} From({targetSourceType.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
                 .WriteOpeningBracket()
                 .WriteLine(
-                    $"return {sourceClassParameterName} == null ? null : {MappingContextSource.ClassName}.{MappingContextSource.FactoryMethodName}<{model.SourceType}, {model.TypeIdentifierName}>({sourceClassParameterName});")
+                    $"return {sourceClassParameterName} == null ? null : {MappingContextSource.ClassName}.{MappingContextSource.FactoryMethodName}<{targetSourceType.SourceType}, {model.TypeIdentifierName}>({sourceClassParameterName});")
                 .WriteClosingBracket();
         }
 
@@ -153,22 +162,25 @@ namespace MapTo.Sources
             {
                 return builder;
             }
+            var targetSourceType = model.MappedSourceTypes[0];
 
             return builder
                 .WriteLine("/// <summary>")
                 .WriteLine($"/// Creates a new instance of <see cref=\"{model.TypeIdentifierName}\"/> and sets its participating properties")
                 .WriteLine($"/// using the property values from <paramref name=\"{sourceClassParameterName}\"/>.")
                 .WriteLine("/// </summary>")
-                .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{model.SourceType}\"/> to use as source.</param>")
+                .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{targetSourceType.SourceType}\"/> to use as source.</param>")
                 .WriteLine(
                     $"/// <returns>A new instance of <see cred=\"{model.TypeIdentifierName}\"/> -or- <c>null</c> if <paramref name=\"{sourceClassParameterName}\"/> is <c>null</c>.</returns>");
         }
 
         private static SourceBuilder GenerateSourceTypeExtensionClass(this SourceBuilder builder, MappingModel model)
         {
+            var targetSourceType = model.MappedSourceTypes[0];
+
             return builder
                 .WriteLine(
-                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static partial class {model.SourceTypeIdentifierName}To{model.TypeIdentifierName}Extensions")
+                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static partial class {targetSourceType.SourceTypeIdentifierName}To{model.TypeIdentifierName}Extensions")
                 .WriteOpeningBracket()
                 .GenerateSourceTypeExtensionMethod(model)
                 .WriteClosingBracket();
@@ -176,13 +188,15 @@ namespace MapTo.Sources
 
         private static SourceBuilder GenerateSourceTypeExtensionMethod(this SourceBuilder builder, MappingModel model)
         {
-            var sourceClassParameterName = model.SourceTypeIdentifierName.ToCamelCase();
+            var targetSourceType = model.MappedSourceTypes[0];
+
+            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
             return builder
                 .GenerateConvertorMethodsXmlDocs(model, sourceClassParameterName)
                 .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
                 .WriteLine(
-                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} To{model.TypeIdentifierName}(this {model.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
+                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} To{model.TypeIdentifierName}(this {targetSourceType.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
                 .WriteOpeningBracket()
                 .WriteLine($"return {sourceClassParameterName} == null ? null : new {model.TypeIdentifierName}({sourceClassParameterName});")
                 .WriteClosingBracket();