Added support for serialization and deserialization of 'object' to static code generation

YamlDotNet.Analyzers.StaticGenerator/StaticContextFile.cs

@@ -34,10 +34,48 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
         {
             Write($"public partial class {classSyntaxReceiver.YamlStaticContextType?.Name ?? "StaticContext"} : YamlDotNet.Serialization.StaticContext");
             Write("{"); Indent();
-            Write("public YamlDotNet.Serialization.ObjectFactories.StaticObjectFactory ObjectFactory { get; } = new StaticObjectFactory();");
-            Write("public StaticTypeInspector TypeInspector { get; } = new StaticTypeInspector();");
-            Write("public override YamlDotNet.Serialization.ObjectFactories.StaticObjectFactory GetFactory() => ObjectFactory;");
-            Write("public override YamlDotNet.Serialization.ITypeInspector GetTypeInspector() => TypeInspector;");
+            Write("private readonly YamlDotNet.Serialization.ObjectFactories.StaticObjectFactory _objectFactory;");
+            Write("private readonly YamlDotNet.Serialization.ITypeResolver _typeResolver;");
+            Write("private readonly YamlDotNet.Serialization.ITypeInspector _typeInspector;");
+            Write($"public {classSyntaxReceiver.YamlStaticContextType?.Name ?? "StaticContext"}()");
+            Write("{"); Indent();
+            Write("_objectFactory = new StaticObjectFactory();");
+            Write("_typeResolver = new StaticTypeResolver(this);");
+            Write("_typeInspector = new StaticTypeInspector(_typeResolver);");
+            UnIndent(); Write("}");
+            Write("public override YamlDotNet.Serialization.ObjectFactories.StaticObjectFactory GetFactory() => _objectFactory;");
+            Write("public override YamlDotNet.Serialization.ITypeInspector GetTypeInspector() => _typeInspector;");
+            Write("public override YamlDotNet.Serialization.ITypeResolver GetTypeResolver() => _typeResolver;");
+            Write("public override bool IsKnownType(Type type)");
+            Write("{"); Indent();
+            foreach (var o in classSyntaxReceiver.Classes)
+            {
+                var classObject = o.Value;
+                if (classObject.IsArray)
+                {
+                    Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
+                }
+                else if (classObject.IsList)
+                {
+                    Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
+                }
+                else if (classObject.IsDictionary)
+                {
+                    Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
+                }
+                else
+                {
+                    Write($"if (type == typeof({o.Value.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
+                    //always support a array, list and dictionary of the type
+                    Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}[])) return true;");
+                    Write($"if (type == typeof(System.Collections.Generic.List<{classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return true;");
+                    Write($"if (type == typeof(System.Collections.Generic.Dictionary<string, {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return true;");
+                }
+            }
+            // always support dictionary object
+            Write("if (type == typeof(System.Collections.Generic.Dictionary<object, object>)) return true;");
+            Write("return false;");
+            UnIndent(); Write("}");
             UnIndent(); Write("}");
         }
     }

YamlDotNet.Analyzers.StaticGenerator/StaticObjectFactoryFile.cs

@@ -43,8 +43,12 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
             {
                 var classObject = o.Value;
                 Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return new {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}();");
+                //always support a list and dictionary of the type
                 Write($"if (type == typeof(System.Collections.Generic.List<{classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return new System.Collections.Generic.List<{classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>();");
+                Write($"if (type == typeof(System.Collections.Generic.Dictionary<string, {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return new System.Collections.Generic.Dictionary<string, {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>();");
             }
+            // always support dictionary when deserializing object
+            Write("if (type == typeof(System.Collections.Generic.Dictionary<object, object>)) return new System.Collections.Generic.Dictionary<object, object>();");
             Write($"throw new ArgumentOutOfRangeException(\"Unknown type: \" + type.ToString());");
             UnIndent(); Write("}");
 
@@ -67,10 +71,21 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
 
             Write("public override bool IsDictionary(Type type)");
             Write("{"); Indent();
-            foreach (var o in classSyntaxReceiver.Classes.Where(c => c.Value.IsDictionary))
+            foreach (var o in classSyntaxReceiver.Classes)
             {
-                Write($"if (type == typeof({o.Value.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
+                var classObject = o.Value;
+                if (classObject.IsDictionary)
+                {
+                    Write($"if (type == typeof({o.Value.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
+                }
+                else
+                {
+                    //always support a dictionary of the type
+                    Write($"if (type == typeof(System.Collections.Generic.Dictionary<string, {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return true;");
+                }
             }
+            // always support dictionary object
+            Write("if (type == typeof(System.Collections.Generic.Dictionary<object, object>)) return true;");
             Write("return false;");
             UnIndent(); Write("}");
 
@@ -79,7 +94,7 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
             foreach (var o in classSyntaxReceiver.Classes)
             {
                 var classObject = o.Value;
-                if (o.Value.IsArray)
+                if (classObject.IsArray)
                 {
                     Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return true;");
                 }
@@ -115,20 +130,27 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
             foreach (var o in classSyntaxReceiver.Classes)
             {
                 var classObject = o.Value;
-                if (!classObject.IsDictionary)
+                if (classObject.IsDictionary)
                 {
-                    continue;
-                }
+                    var keyType = "object";
+                    var type = (INamedTypeSymbol)classObject.ModuleSymbol;
 
-                var keyType = "object";
-                var type = (INamedTypeSymbol)classObject.ModuleSymbol;
+                    if (type.IsGenericType)
+                    {
+                        keyType = type.TypeArguments[0].GetFullName().Replace("?", string.Empty);
+                    }
 
-                if (type.IsGenericType)
+                    Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return typeof({keyType});");
+                }
+                else if (!classObject.IsArray && !classObject.IsList)
                 {
-                    keyType = type.TypeArguments[0].GetFullName().Replace("?", string.Empty);
+                    //always support a dictionary of the type
+                    Write($"if (type == typeof(System.Collections.Generic.Dictionary<string, {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)});");
                 }
-                Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return typeof({keyType});");
             }
+
+            // always support dictionary object
+            Write("if (type == typeof(System.Collections.Generic.Dictionary<object, object>)) return typeof(object);");
             Write("throw new ArgumentOutOfRangeException(\"Unknown type: \" + type.ToString());");
             UnIndent(); Write("}");
 
@@ -159,14 +181,16 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
                 Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)})) return typeof({valueType});");
             }
 
-            //always support array and list of all types
+            //always support array, list and dictionary of all types
             foreach (var o in classSyntaxReceiver.Classes)
             {
                 var classObject = o.Value;
                 Write($"if (type == typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}[])) return typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)});");
                 Write($"if (type == typeof(System.Collections.Generic.List<{classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)});");
+                Write($"if (type == typeof(System.Collections.Generic.Dictionary<string, {classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)}>)) return typeof({classObject.ModuleSymbol.GetFullName().Replace("?", string.Empty)});");
             }
 
+            Write("if (type == typeof(System.Collections.Generic.Dictionary<object, object>)) return typeof(object);");
             Write("throw new ArgumentOutOfRangeException(\"Unknown type: \" + type.ToString());");
             UnIndent(); Write("}");
             WriteExecuteMethod(classSyntaxReceiver, "ExecuteOnDeserializing", (c) => c.OnDeserializingMethods);

YamlDotNet.Analyzers.StaticGenerator/StaticPropertyDescriptorFile.cs

@@ -34,6 +34,7 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
         {
             Write("class StaticPropertyDescriptor : YamlDotNet.Serialization.IPropertyDescriptor");
             Write("{"); Indent();
+            Write("private readonly YamlDotNet.Serialization.ITypeResolver _typeResolver;");
             Write("private YamlDotNet.Serialization.IObjectAccessor _accessor;");
             Write("private readonly Attribute[] _attributes;");
             Write("public string Name { get; }");
@@ -52,14 +53,17 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
             UnIndent(); Write("}");
             Write("public YamlDotNet.Serialization.IObjectDescriptor Read(object target)");
             Write("{"); Indent();
-            Write("return new YamlDotNet.Serialization.ObjectDescriptor(_accessor.Read(Name, target), Type, Type, this.ScalarStyle);");
+            Write("var propertyValue = _accessor.Read(Name, target);");
+            Write("var actualType = _typeResolver.Resolve(Type, propertyValue);");
+            Write("return new YamlDotNet.Serialization.ObjectDescriptor(propertyValue, actualType, Type, this.ScalarStyle);");
             UnIndent(); Write("}");
             Write("public void Write(object target, object value)");
             Write("{"); Indent();
             Write("_accessor.Set(Name, target, value);");
             UnIndent(); Write("}");
-            Write("public StaticPropertyDescriptor(YamlDotNet.Serialization.IObjectAccessor accessor, string name, bool canWrite, Type type, Attribute[] attributes)");
+            Write("public StaticPropertyDescriptor(YamlDotNet.Serialization.ITypeResolver typeResolver, YamlDotNet.Serialization.IObjectAccessor accessor, string name, bool canWrite, Type type, Attribute[] attributes)");
             Write("{"); Indent();
+            Write("this._typeResolver = typeResolver;");
             Write("this._accessor = accessor;");
             Write("this._attributes = attributes;");
             Write("this.Name = name;");

YamlDotNet.Analyzers.StaticGenerator/StaticTypeInspectorFile.cs

@@ -38,6 +38,12 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
             Write("public class StaticTypeInspector : YamlDotNet.Serialization.ITypeInspector");
             Write("{"); Indent();
 
+            Write("private readonly YamlDotNet.Serialization.ITypeResolver _typeResolver;");
+            Write("public StaticTypeInspector(YamlDotNet.Serialization.ITypeResolver typeResolver)");
+            Write("{"); Indent();
+            Write("_typeResolver = typeResolver;");
+            UnIndent(); Write("}");
+
             #region GetProperties
             Write("public IEnumerable<YamlDotNet.Serialization.IPropertyDescriptor> GetProperties(Type type, object container)");
             Write("{"); Indent();
@@ -96,7 +102,7 @@ public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
 
         private void WritePropertyDescriptor(string name, ITypeSymbol type, bool isReadonly, ImmutableArray<AttributeData> attributes, char finalChar)
         {
-            Write($"new StaticPropertyDescriptor(accessor, \"{name}\", {(!isReadonly).ToString().ToLower()}, typeof({type.GetFullName().Replace("?", string.Empty)}), new Attribute[] {{");
+            Write($"new StaticPropertyDescriptor(_typeResolver, accessor, \"{name}\", {(!isReadonly).ToString().ToLower()}, typeof({type.GetFullName().Replace("?", string.Empty)}), new Attribute[] {{");
             foreach (var attribute in attributes)
             {
                 switch (attribute.AttributeClass?.ToDisplayString())

YamlDotNet.Analyzers.StaticGenerator/StaticTypeResolverFile.cs

@@ -0,0 +1,51 @@
+// This file is part of YamlDotNet - A .NET library for YAML.
+// Copyright (c) Antoine Aubry and contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+// of the Software, and to permit persons to whom the Software is furnished to do
+// so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+using System;
+using Microsoft.CodeAnalysis;
+
+namespace YamlDotNet.Analyzers.StaticGenerator
+{
+    public class StaticTypeResolverFile : File
+    {
+        public StaticTypeResolverFile(Action<string, bool> write, Action indent, Action unindent, GeneratorExecutionContext context) : base(write, indent, unindent, context)
+        {
+        }
+
+        public override void Write(ClassSyntaxReceiver classSyntaxReceiver)
+        {
+            Write($"class StaticTypeResolver : YamlDotNet.Serialization.TypeResolvers.StaticTypeResolver");
+            Write("{"); Indent();
+            Write("private readonly YamlDotNet.Serialization.StaticContext _context;");
+            Write($"public StaticTypeResolver(YamlDotNet.Serialization.StaticContext context)");
+            Write("{"); Indent();
+            Write("_context = context;");
+            UnIndent(); Write("}");
+            Write("public override Type Resolve(Type staticType, object actualValue)");
+            Write("{"); Indent();
+            Write("var result = base.Resolve(staticType, actualValue);");
+            Write("if (result == staticType && actualValue != null && _context.IsKnownType(actualValue.GetType())) result = actualValue.GetType();");
+            Write("return result;");
+            UnIndent(); Write("}");
+            UnIndent(); Write("}");
+        }
+    }
+}

YamlDotNet.Analyzers.StaticGenerator/TypeFactoryGenerator.cs

@@ -96,6 +96,7 @@ private string GenerateSource(ClassSyntaxReceiver classSyntaxReceiver)
 
                 new StaticContextFile(write, indent, unindent, _context).Write(classSyntaxReceiver);
                 new StaticObjectFactoryFile(write, indent, unindent, _context).Write(classSyntaxReceiver);
+                new StaticTypeResolverFile(write, indent, unindent, _context).Write(classSyntaxReceiver);
                 new StaticPropertyDescriptorFile(write, indent, unindent, _context).Write(classSyntaxReceiver);
                 new StaticTypeInspectorFile(write, indent, unindent, _context).Write(classSyntaxReceiver);
                 new ObjectAccessorFileGenerator(write, indent, unindent, _context).Write(classSyntaxReceiver);

YamlDotNet.Core7AoTCompileTest/Program.cs

@@ -76,6 +76,10 @@
   NotInherited: world
 External:
   Text: hello
+SomeObject: a
+SomeDictionary:
+  a: 1
+  b: 2
 ");
 
 var input = new StringReader(yaml);
@@ -211,6 +215,8 @@ public class PrimitiveTypes
     public List<string>? MyList { get; set; }
     public Inherited Inherited { get; set; }
     public ExternalModel External { get; set; }
+    public object SomeObject { get; set; }
+    public object SomeDictionary { get; set; }
 }
 
 public class InheritedBase

YamlDotNet.Test/Analyzers/StaticGenerator/ObjectTests.cs

@@ -18,6 +18,8 @@
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
+
+using System.Collections.Generic;
 using Xunit;
 using YamlDotNet.Serialization;
 using YamlDotNet.Serialization.Callbacks;
@@ -53,6 +55,15 @@ public void RegularObjectWorks()
   Prop2: 2
 Nested:
   NestedProp: abc
+DictionaryOfArrays:
+  a:
+  - 1
+  b:
+  - 2
+SomeValue: ""abc""
+SomeDictionary:
+  a: 1
+  b: 2
 ";
             var actual = deserializer.Deserialize<RegularObjectOuter>(yaml);
             Assert.Equal("hello", actual.Prop1);
@@ -64,6 +75,11 @@ public void RegularObjectWorks()
             Assert.Equal(2, actual.Inner.Prop2);
             Assert.NotNull(actual.Nested);
             Assert.Equal("abc", actual.Nested.NestedProp);
+            Assert.Equal("1", actual.DictionaryOfArrays["a"][0]);
+            Assert.Equal("2", actual.DictionaryOfArrays["b"][0]);
+            Assert.Equal("abc", actual.SomeValue);
+            Assert.Equal("1", ((IDictionary<object, object>)actual.SomeDictionary)["a"]);
+            Assert.Equal("2", ((IDictionary<object, object>)actual.SomeDictionary)["b"]);
 
             var serializer = new StaticSerializerBuilder(new StaticContext()).Build();
             var actualYaml = serializer.Serialize(actual);
@@ -76,7 +92,15 @@ public void RegularObjectWorks()
   Prop2: 2
 Nested:
   NestedProp: abc
-";
+DictionaryOfArrays:
+  a:
+  - 1
+  b:
+  - 2
+SomeValue: abc
+SomeDictionary:
+  a: 1
+  b: 2";
             Assert.Equal(yaml.NormalizeNewLines().TrimNewLines(), actualYaml.NormalizeNewLines().TrimNewLines());
         }
 
@@ -143,6 +167,12 @@ public class RegularObjectOuter
         public RegularObjectInner Inner { get; set; }
         public NestedClass Nested { get; set; }
 
+        public Dictionary<string, string[]> DictionaryOfArrays { get; set; }
+
+        public object SomeValue { get; set; }
+
+        public object SomeDictionary { get; set; }
+
         [YamlSerializable]
         public class NestedClass
         {