private SyntaxNode MapCollections(SyntaxNode sourceAccess, ITypeSymbol sourceListType, ITypeSymbol targetListType, MappingPath mappingPath)
{
var isReadonlyCollection = ObjectHelper.IsReadonlyCollection(targetListType);
var sourceListElementType = MappingHelper.GetElementType(sourceListType);
var targetListElementType = MappingHelper.GetElementType(targetListType);
if (ObjectHelper.IsSimpleType(sourceListElementType) || sourceListElementType.Equals(targetListElementType))
{
var toListInvocation = AddMaterializeCollectionInvocation(syntaxGenerator, sourceAccess, targetListType);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toListInvocation, isReadonlyCollection, syntaxGenerator));
}
var selectAccess = syntaxGenerator.MemberAccessExpression(sourceAccess, "Select");
var lambdaParameterName = CreateLambdaParameterName(sourceAccess);
var mappingLambda = CreateMappingLambda(lambdaParameterName, sourceListElementType, targetListElementType, mappingPath);
var selectInvocation = syntaxGenerator.InvocationExpression(selectAccess, mappingLambda);
var toList = AddMaterializeCollectionInvocation(syntaxGenerator, selectInvocation, targetListType);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toList, isReadonlyCollection, syntaxGenerator));
}
private SyntaxNode MapCollections(SyntaxNode sourceAccess, ITypeSymbol sourceListType, ITypeSymbol targetListType, MappingPath mappingPath)
{
var isReadonlyCollection = ObjectHelper.IsReadonlyCollection(targetListType);
var sourceListElementType = MappingHelper.GetElementType(sourceListType);
var targetListElementType = MappingHelper.GetElementType(targetListType);
if (ShouldCreateConversionBetweenTypes(targetListElementType, sourceListElementType))
{
var useConvert = CanUseConvert(sourceListType);
var selectAccess = useConvert ? syntaxGenerator.MemberAccessExpression(sourceAccess, "ConvertAll"): syntaxGenerator.MemberAccessExpression(sourceAccess, "Select");
var lambdaParameterName = NameHelper.CreateLambdaParameterName(sourceAccess);
var mappingLambda = CreateMappingLambda(lambdaParameterName, sourceListElementType, targetListElementType, mappingPath);
var selectInvocation = syntaxGenerator.InvocationExpression(selectAccess, mappingLambda);
var toList = useConvert? selectInvocation: AddMaterializeCollectionInvocation(syntaxGenerator, selectInvocation, targetListType);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toList, isReadonlyCollection, syntaxGenerator));
}
var toListInvocation = AddMaterializeCollectionInvocation(syntaxGenerator, sourceAccess, targetListType);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toListInvocation, isReadonlyCollection, syntaxGenerator));
}
internal SyntaxNode GetDefaultExpression(ITypeSymbol type, MappingPath mappingPath)
{
if (mappingPath.AddToMapped(type) == false)
{
return(syntaxGenerator.DefaultExpression(type)
.WithTrailingTrivia(SyntaxFactory.Comment(" /* Stop recursive mapping */")));
}
if (type.TypeKind == TypeKind.Enum && type is INamedTypeSymbol namedTypeSymbol)
{
var enumOptions = namedTypeSymbol.MemberNames.ToList();
if (enumOptions.Count > 0)
{
return(syntaxGenerator.MemberAccessExpression(syntaxGenerator.IdentifierName(namedTypeSymbol.Name), syntaxGenerator.IdentifierName(enumOptions[0])));
}
return(syntaxGenerator.DefaultExpression(type));
}
if (type.SpecialType == SpecialType.None)
{
var objectCreationExpression = (ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(type);
if (MappingHelper.IsCollection(type))
{
var isReadonlyCollection = ObjectHelper.IsReadonlyCollection(type);
if (type is IArrayTypeSymbol)
{
objectCreationExpression = SyntaxFactory.ObjectCreationExpression((TypeSyntax)syntaxGenerator.TypeExpression(type));
}
else if (type.TypeKind == TypeKind.Interface || isReadonlyCollection)
{
var namedType = type as INamedTypeSymbol;
if (namedType.IsGenericType)
{
var typeArgumentListSyntax = SyntaxFactory.TypeArgumentList(SyntaxFactory.SeparatedList(namedType.TypeArguments.Select(x => syntaxGenerator.TypeExpression(x))));
var newType = SyntaxFactory.GenericName(SyntaxFactory.Identifier("List"), typeArgumentListSyntax);
objectCreationExpression = SyntaxFactory.ObjectCreationExpression(newType, SyntaxFactory.ArgumentList(), default(InitializerExpressionSyntax));
}
else
{
var newType = SyntaxFactory.ParseTypeName("ArrayList");
objectCreationExpression = SyntaxFactory.ObjectCreationExpression(newType, SyntaxFactory.ArgumentList(), default(InitializerExpressionSyntax));
}
}
var subType = MappingHelper.GetElementType(type);
var initializationBlockExpressions = new SeparatedSyntaxList <ExpressionSyntax>();
var subTypeDefault = (ExpressionSyntax)GetDefaultExpression(subType, mappingPath.Clone());
if (subTypeDefault != null)
{
initializationBlockExpressions = initializationBlockExpressions.Add(subTypeDefault);
}
var initializerExpressionSyntax = SyntaxFactory.InitializerExpression(SyntaxKind.ObjectInitializerExpression, initializationBlockExpressions).FixInitializerExpressionFormatting(objectCreationExpression);
return(objectCreationExpression
.WithInitializer(initializerExpressionSyntax)
.WrapInReadonlyCollectionIfNecessary(isReadonlyCollection, syntaxGenerator));
}
{
var nt = type as INamedTypeSymbol;
if (nt.TypeKind == TypeKind.Interface)
{
var implementations = SymbolFinder.FindImplementationsAsync(nt, this._document.Project.Solution).Result;
var firstImplementation = implementations.FirstOrDefault();
if (firstImplementation is INamedTypeSymbol == false)
{
return(syntaxGenerator.DefaultExpression(nt)
.WithTrailingTrivia(SyntaxFactory.Comment($" /* Cannot find any type implementing {nt.Name} */")));
}
nt = firstImplementation as INamedTypeSymbol;
objectCreationExpression =
(ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(nt);
}
var hasDefaultConstructor = nt.Constructors.Any(x => x.Parameters.Length == 0);
if (hasDefaultConstructor == false && nt.Constructors.Length > 0)
{
var randomConstructor = nt.Constructors.First();
var constructorArguments = randomConstructor.Parameters.Select(p => GetDefaultExpression(p.Type, mappingPath.Clone())).ToList();
objectCreationExpression = (ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(nt, constructorArguments);
}
var fields = ObjectHelper.GetFieldsThaCanBeSetPublicly(nt);
var assignments = fields.Select(x =>
{
var identifier = (ExpressionSyntax)(SyntaxFactory.IdentifierName(x.Name));
return((ExpressionSyntax)syntaxGenerator.AssignmentStatement(identifier, this.FindMappingSource(x.Type, mappingPath.Clone()).Expression));
}).ToList();
if (assignments.Count == 0)
{
return(objectCreationExpression);
}
var initializerExpressionSyntax = SyntaxFactory.InitializerExpression(SyntaxKind.ObjectInitializerExpression, new SeparatedSyntaxList <ExpressionSyntax>().AddRange(assignments)).FixInitializerExpressionFormatting(objectCreationExpression);
return(objectCreationExpression.WithInitializer(initializerExpressionSyntax));
}
}
switch (type.SpecialType)
{
case SpecialType.System_Boolean:
return(syntaxGenerator.LiteralExpression(true));
case SpecialType.System_SByte:
return(syntaxGenerator.LiteralExpression(1));
case SpecialType.System_Int16:
return(syntaxGenerator.LiteralExpression(16));
case SpecialType.System_Int32:
return(syntaxGenerator.LiteralExpression(32));
case SpecialType.System_Int64:
return(syntaxGenerator.LiteralExpression(64));
case SpecialType.System_Byte:
return(syntaxGenerator.LiteralExpression(1));
case SpecialType.System_UInt16:
return(syntaxGenerator.LiteralExpression(16u));
case SpecialType.System_UInt32:
return(syntaxGenerator.LiteralExpression(32u));
case SpecialType.System_UInt64:
return(syntaxGenerator.LiteralExpression(64u));
case SpecialType.System_Single:
return(syntaxGenerator.LiteralExpression(1.0f));
case SpecialType.System_Double:
return(syntaxGenerator.LiteralExpression(1.0));
case SpecialType.System_Char:
return(syntaxGenerator.LiteralExpression('a'));
case SpecialType.System_String:
return(syntaxGenerator.LiteralExpression("lorem ipsum"));
case SpecialType.System_Decimal:
return(syntaxGenerator.LiteralExpression(2.0m));
case SpecialType.System_Object:
return(SyntaxFactory.ObjectCreationExpression((TypeSyntax)syntaxGenerator.TypeExpression(type), SyntaxFactory.ArgumentList(), default(InitializerExpressionSyntax)));
default:
return(syntaxGenerator.LiteralExpression("ccc"));
}
}
internal SyntaxNode GetDefaultExpression(ITypeSymbol type, MappingPath mappingPath)
{
if (mappingPath.AddToMapped(type) == false)
{
return(syntaxGenerator.DefaultExpression(type)
.WithTrailingTrivia(SyntaxFactory.Comment(" /* Stop recursive mapping */")));
}
if (SymbolHelper.IsNullable(type, out var underlyingType))
{
type = underlyingType;
}
if (type.TypeKind == TypeKind.Enum && type is INamedTypeSymbol namedTypeSymbol)
{
var enumOptions = namedTypeSymbol.MemberNames.Where(x => x != "value__" && x != ".ctor").ToList();
if (enumOptions.Count > 0)
{
return(syntaxGenerator.MemberAccessExpression(syntaxGenerator.IdentifierName(namedTypeSymbol.Name), syntaxGenerator.IdentifierName(enumOptions[0])));
}
return(syntaxGenerator.DefaultExpression(type));
}
if (type.SpecialType == SpecialType.None)
{
var objectCreationExpression = (ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(type);
if (MappingHelper.IsCollection(type))
{
var isReadonlyCollection = ObjectHelper.IsReadonlyCollection(type);
if (type is IArrayTypeSymbol)
{
objectCreationExpression = SyntaxFactory.ObjectCreationExpression((TypeSyntax)syntaxGenerator.TypeExpression(type));
}
else if (type.TypeKind == TypeKind.Interface || isReadonlyCollection)
{
var namedType = type as INamedTypeSymbol;
if (namedType.IsGenericType)
{
var typeArgumentListSyntax = SyntaxFactory.TypeArgumentList(SyntaxFactory.SeparatedList(namedType.TypeArguments.Select(x => syntaxGenerator.TypeExpression(x))));
var newType = SyntaxFactory.GenericName(SyntaxFactory.Identifier("List"), typeArgumentListSyntax);
objectCreationExpression = SyntaxFactory.ObjectCreationExpression(newType, SyntaxFactory.ArgumentList(), default(InitializerExpressionSyntax));
}
else
{
var newType = SyntaxFactory.ParseTypeName("ArrayList");
objectCreationExpression = SyntaxFactory.ObjectCreationExpression(newType, SyntaxFactory.ArgumentList(), default(InitializerExpressionSyntax));
}
}
var subType = MappingHelper.GetElementType(type);
var initializationBlockExpressions = new SeparatedSyntaxList <ExpressionSyntax>();
var subTypeDefault = (ExpressionSyntax)GetDefaultExpression(subType, mappingPath.Clone());
if (subTypeDefault != null)
{
initializationBlockExpressions = initializationBlockExpressions.Add(subTypeDefault);
}
var initializerExpressionSyntax = SyntaxFactory.InitializerExpression(SyntaxKind.ObjectInitializerExpression, initializationBlockExpressions).FixInitializerExpressionFormatting(objectCreationExpression);
return(objectCreationExpression
.WithInitializer(initializerExpressionSyntax)
.WrapInReadonlyCollectionIfNecessary(isReadonlyCollection, syntaxGenerator));
}
{
var nt = type as INamedTypeSymbol;
if (nt == null)
{
var genericTypeConstraints = type.UnwrapGeneric().ToList();
if (genericTypeConstraints.Any() == false)
{
return(GetDefaultForUnknown(type, SyntaxFactory.ParseTypeName("object")));
}
nt = genericTypeConstraints.FirstOrDefault(x => x.TypeKind == TypeKind.Class) as INamedTypeSymbol ??
genericTypeConstraints.FirstOrDefault(x => x.TypeKind == TypeKind.Interface) as INamedTypeSymbol;
}
if (nt == null)
{
return(GetDefaultForUnknownType(type));
}
if (nt.TypeKind == TypeKind.Interface)
{
var implementations = SymbolFinder.FindImplementationsAsync(type, this._document.Project.Solution).Result;
var firstImplementation = implementations.FirstOrDefault();
if (firstImplementation is INamedTypeSymbol == false)
{
return(GetDefaultForUnknownType(type));
}
nt = firstImplementation as INamedTypeSymbol;
objectCreationExpression = (ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(nt);
}
else if (nt.TypeKind == TypeKind.Class && nt.IsAbstract)
{
var randomDerived = SymbolFinder.FindDerivedClassesAsync(nt, this._document.Project.Solution).Result
.FirstOrDefault(x => x.IsAbstract == false);
if (randomDerived != null)
{
nt = randomDerived;
objectCreationExpression = (ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(nt);
}
}
var publicConstructors = nt.Constructors.Where(x =>
x.DeclaredAccessibility == Accessibility.Public ||
(x.DeclaredAccessibility == Accessibility.Internal &&
x.ContainingAssembly.IsSameAssemblyOrHasFriendAccessTo(_contextAssembly))).ToList();
var hasDefaultConstructor = publicConstructors.Any(x => x.Parameters.Length == 0);
if (hasDefaultConstructor == false && publicConstructors.Count > 0)
{
var randomConstructor = publicConstructors.First();
var constructorArguments = randomConstructor.Parameters.Select(p => GetDefaultExpression(p.Type, mappingPath.Clone())).ToList();
objectCreationExpression = (ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(nt, constructorArguments);
}
var fields = ObjectHelper.GetFieldsThaCanBeSetPublicly(nt, _contextAssembly);
var assignments = fields.Select(x =>
{
var identifier = (ExpressionSyntax)(SyntaxFactory.IdentifierName(x.Name));
return((ExpressionSyntax)syntaxGenerator.AssignmentStatement(identifier, this.FindMappingSource(x.Type, mappingPath.Clone()).Expression));
}).ToList();
if (assignments.Count == 0)
{
return(objectCreationExpression);
}
var initializerExpressionSyntax = SyntaxFactory.InitializerExpression(SyntaxKind.ObjectInitializerExpression, new SeparatedSyntaxList <ExpressionSyntax>().AddRange(assignments)).FixInitializerExpressionFormatting(objectCreationExpression);
return(objectCreationExpression.WithInitializer(initializerExpressionSyntax));
}
}
return(GetDefaultForSpecialType(type));
}
protected virtual MappingElement TryToCreateMappingExpression(MappingElement source, ITypeSymbol targetType, MappingPath mappingPath)
{
//TODO: If source expression is method or constructor invocation then we should extract local variable and use it im mappings as a reference
var namedTargetType = targetType as INamedTypeSymbol;
if (namedTargetType != null)
{
var directlyMappingConstructor = namedTargetType.Constructors.FirstOrDefault(c => c.Parameters.Length == 1 && c.Parameters[0].Type.Equals(source.ExpressionType));
if (directlyMappingConstructor != null)
{
var constructorParameters = SyntaxFactory.ArgumentList().AddArguments(SyntaxFactory.Argument(source.Expression));
var creationExpression = syntaxGenerator.ObjectCreationExpression(targetType, constructorParameters.Arguments);
return(new MappingElement()
{
ExpressionType = targetType,
Expression = (ExpressionSyntax)creationExpression
});
}
}
if (MappingHelper.IsMappingBetweenCollections(targetType, source.ExpressionType))
{
return(new MappingElement()
{
ExpressionType = targetType,
Expression = MapCollections(source.Expression, source.ExpressionType, targetType, mappingPath.Clone()) as ExpressionSyntax
});
}
var subMappingSourceFinder = new ObjectMembersMappingSourceFinder(source.ExpressionType, source.Expression, syntaxGenerator);
if (namedTargetType != null)
{
//maybe there is constructor that accepts parameter matching source properties
var constructorOverloadParameterSets = namedTargetType.Constructors.Select(x => x.Parameters);
var matchedOverload = MethodHelper.FindBestParametersMatch(subMappingSourceFinder, constructorOverloadParameterSets);
if (matchedOverload != null)
{
var creationExpression = ((ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(targetType, matchedOverload.ToArgumentListSyntax(this).Arguments));
var matchedSources = matchedOverload.GetMatchedSources();
var restSourceFinder = new IgnorableMappingSourceFinder(subMappingSourceFinder, foundElement =>
{
return(matchedSources.Any(x => x.Expression.IsEquivalentTo(foundElement.Expression)));
});
return(new MappingElement()
{
ExpressionType = targetType,
Expression = AddInitializerWithMapping(creationExpression, restSourceFinder, targetType, mappingPath)
});
}
}
var objectCreationExpressionSyntax = ((ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(targetType));
return(new MappingElement()
{
ExpressionType = targetType,
Expression = AddInitializerWithMapping(objectCreationExpressionSyntax, subMappingSourceFinder, targetType, mappingPath)
});
}