private MappingElement FindSubPropertySource(string targetName, ITypeSymbol containingType, IEnumerable <IPropertySymbol> properties, SyntaxNode currentAccessor, string prefix = null)
{
if (ObjectHelper.IsSimpleType(containingType))
{
return(null);
}
var subProperty = properties.FirstOrDefault(x => targetName.StartsWith($"{prefix}{x.Name}", StringComparison.OrdinalIgnoreCase));
if (subProperty != null)
{
var currentNamePart = $"{prefix}{subProperty.Name}";
var subPropertyAccessor = (ExpressionSyntax)generator.MemberAccessExpression(currentAccessor, subProperty.Name);
if (targetName.Equals(currentNamePart, StringComparison.OrdinalIgnoreCase))
{
return(new MappingElement()
{
Expression = subPropertyAccessor,
ExpressionType = subProperty.Type
});
}
return(FindSubPropertySource(targetName, subProperty.Type, ObjectHelper.GetPublicPropertySymbols(subProperty.Type), subPropertyAccessor, currentNamePart));
}
return(null);
}
private static IEnumerable <SyntaxNode> GenerateMappingCode(IMethodSymbol methodSymbol,
SyntaxGenerator generator, MappingGenerator mappingGenerator, SemanticModel semanticModel)
{
if (SymbolHelper.IsPureMappingFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var targetType = methodSymbol.ReturnType;
return(mappingGenerator.MapTypes(source.Type, targetType, generator.IdentifierName(source.Name)));
}
var isMappingConstructor = SymbolHelper.IsMappingConstructor(methodSymbol);
if (SymbolHelper.IsUpdateThisObjectFunction(methodSymbol) || isMappingConstructor)
{
var source = methodSymbol.Parameters[0];
var targetType = methodSymbol.ContainingType;
return(mappingGenerator.MapTypes(source.Type, targetType, generator.IdentifierName(source.Name), generator.ThisExpression(), targetExists: true, isConstructorContext: isMappingConstructor));
}
if (SymbolHelper.IsUpdateParameterFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var target = methodSymbol.Parameters[1];
return(mappingGenerator.MapTypes(source.Type, target.Type, generator.IdentifierName(source.Name), generator.IdentifierName(target.Name), targetExists: true));
}
var isMultiParameterConstructor = SymbolHelper.IsMultiParameterUpdateThisObjectFunction(methodSymbol);
if (isMultiParameterConstructor || SymbolHelper.IsMultiParameterMappingConstructor(methodSymbol))
{
var sourceFinder = new LocalScopeMappingSourceFinder(semanticModel, methodSymbol.Parameters);
return(ObjectHelper.GetPublicPropertySymbols(methodSymbol.ContainingType)
.Where(property => property.SetMethod != null || (property.CanBeSetOnlyFromConstructor() && isMultiParameterConstructor))
.Select(property => new
{
source = sourceFinder.FindMappingSource(property.Name, property.Type),
target = new MappingElement()
{
Expression = SyntaxFactory.IdentifierName(property.Name),
ExpressionType = property.Type
}
})
.Where(x => x.source != null)
.SelectMany(pair => mappingGenerator.Map(pair.source, pair.target)));
}
return(Enumerable.Empty <SyntaxNode>());
}
private async Task <Document> InitizalizeWithLocals(Document document, InitializerExpressionSyntax objectInitializer, CancellationToken cancellationToken)
{
var semanticModel = await document.GetSemanticModelAsync(cancellationToken);
var objectCreationExpression = objectInitializer.FindContainer <ObjectCreationExpressionSyntax>();
var createdObjectType = ModelExtensions.GetTypeInfo(semanticModel, objectCreationExpression).Type;
var mappingSourceFinder = new LocalScopeMappingSourceFinder(semanticModel, objectInitializer);
var propertiesToSet = ObjectHelper.GetPublicPropertySymbols(createdObjectType).Where(x => x.SetMethod?.DeclaredAccessibility == Accessibility.Public);
var initExpressions = propertiesToSet.Aggregate(objectInitializer.Expressions, (expr, property) =>
{
var mappingSource = mappingSourceFinder.FindMappingSource(property.Name, property.Type);
if (mappingSource != null)
{
var assignmentExpression = SyntaxFactory.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SyntaxFactory.IdentifierName(property.Name), mappingSource.Expression);
return(expr.Add(assignmentExpression));
}
return(expr);
});
return(await document.ReplaceNodes(objectInitializer, objectInitializer.WithExpressions(initExpressions), cancellationToken));
}
public IEnumerable <SyntaxNode> MapTypes(ITypeSymbol sourceType, ITypeSymbol targetType,
SyntaxNode globalSourceAccessor, SyntaxNode globbalTargetAccessor = null, bool targetExists = false,
bool generatorContext = false,
bool isConstructorContext = false)
{
if (IsMappingBetweenCollections(targetType, sourceType))
{
var collectionMapping = MapCollections(globalSourceAccessor, sourceType, targetType);
if (globbalTargetAccessor == null)
{
yield return(generator.ContextualReturnStatement(collectionMapping, generatorContext));
}
else if (targetExists == false)
{
yield return(generator.CompleteAssignmentStatement(globbalTargetAccessor, collectionMapping));
}
yield break;
}
var targetLocalVariableName = globbalTargetAccessor == null?ToLocalVariableName(targetType.Name) : ToLocalVariableName(globbalTargetAccessor.ToFullString());
var mappingSourceFinder = new ObjectMembersMappingSourceFinder(sourceType, globalSourceAccessor, generator, semanticModel);
if (targetExists == false)
{
var mappingConstructorParameters = FindMappingConstructorParameters(targetType, sourceType, mappingSourceFinder, (ExpressionSyntax)globalSourceAccessor);
if (mappingConstructorParameters != null)
{
var init = generator.ObjectCreationExpression(targetType, mappingConstructorParameters.Arguments);
if (globbalTargetAccessor == null)
{
yield return(generator.ContextualReturnStatement(init, generatorContext));
}
else
{
yield return(generator.CompleteAssignmentStatement(globbalTargetAccessor, init));
}
yield break;
}
else
{
var init = generator.ObjectCreationExpression(targetType);
yield return(generator.LocalDeclarationStatement(targetLocalVariableName, init));
}
}
var localTargetIdentifier = targetExists? globbalTargetAccessor: generator.IdentifierName(targetLocalVariableName);
foreach (var targetProperty in ObjectHelper.GetPublicPropertySymbols(targetType))
{
if (CanBeSet(targetProperty, globbalTargetAccessor, isConstructorContext) == false)
{
continue;
}
var mappingSource = mappingSourceFinder.FindMappingSource(targetProperty.Name, targetProperty.Type);
if (mappingSource == null)
{
continue;
}
var mappingTarget = new MappingElement()
{
Expression = (ExpressionSyntax)generator.MemberAccessExpression(localTargetIdentifier, targetProperty.Name),
ExpressionType = targetProperty.Type
};
foreach (var syntaxNode in Map(mappingSource, mappingTarget))
{
yield return(syntaxNode);
}
}
if (globbalTargetAccessor == null)
{
yield return(generator.ContextualReturnStatement(localTargetIdentifier, generatorContext));
}
else if (targetExists == false)
{
yield return(generator.CompleteAssignmentStatement(globbalTargetAccessor, localTargetIdentifier));
}
}
public static IEnumerable <IPropertySymbol> GetFieldsThaCanBeSetFromConstructor(ITypeSymbol type)
{
return(ObjectHelper.GetPublicPropertySymbols(type)
.Where(property => property.SetMethod != null || property.CanBeSetOnlyFromConstructor()));
}
public static IEnumerable <IPropertySymbol> GetFieldsThaCanBeSetPrivately(ITypeSymbol type)
{
return(ObjectHelper.GetPublicPropertySymbols(type)
.Where(property => property.SetMethod != null && property.CanBeSetPrivately()));
}
public ObjectMembersMappingSourceFinder(ITypeSymbol sourceType, SyntaxNode sourceGlobalAccessor, SyntaxGenerator generator)
{
this.sourceType = sourceType;
this.sourceGlobalAccessor = sourceGlobalAccessor;
this.generator = generator;
this.sourceProperties = new Lazy <IReadOnlyList <IPropertySymbol> >(() => ObjectHelper.GetPublicPropertySymbols(sourceType)
.Where(property => property.GetMethod != null)
.ToList());
this.sourceMethods = new Lazy <IReadOnlyList <IMethodSymbol> >(() => ObjectHelper.GetPublicGetMethods(sourceType).ToList());
}
public IEnumerable <SyntaxNode> MapTypes(ITypeSymbol sourceType, ITypeSymbol targetType,
SyntaxNode globalSourceAccessor, SyntaxNode globbalTargetAccessor = null, bool targetExists = false,
bool generatorContext = false)
{
if (IsMappingBetweenCollections(targetType, sourceType))
{
var collectionMapping = MapCollections(globalSourceAccessor, sourceType, targetType);
if (globbalTargetAccessor == null)
{
yield return(generator.ContextualReturnStatement(collectionMapping, generatorContext));
}
else if (targetExists == false)
{
yield return(generator.CompleteAssignmentStatement(globbalTargetAccessor, collectionMapping));
}
yield break;
}
var targetLocalVariableName = globbalTargetAccessor == null?ToLocalVariableName(targetType.Name) : ToLocalVariableName(globbalTargetAccessor.ToFullString());
var mappingSourceFinder = new MappingSourceFinder(sourceType, globalSourceAccessor, generator, semanticModel);
if (targetExists == false)
{
var mappingConstructorParameters = FindMappingConstructorParameters(targetType, sourceType, mappingSourceFinder, (ExpressionSyntax)globalSourceAccessor);
if (mappingConstructorParameters != null)
{
var init = generator.ObjectCreationExpression(targetType, mappingConstructorParameters.Arguments);
if (globbalTargetAccessor == null)
{
yield return(generator.ContextualReturnStatement(init, generatorContext));
}
else
{
yield return(generator.CompleteAssignmentStatement(globbalTargetAccessor, init));
}
yield break;
}
else
{
var init = generator.ObjectCreationExpression(targetType);
yield return(generator.LocalDeclarationStatement(targetLocalVariableName, init));
}
}
var localTargetIdentifier = targetExists? globbalTargetAccessor: generator.IdentifierName(targetLocalVariableName);
foreach (var targetProperty in ObjectHelper.GetPublicPropertySymbols(targetType))
{
if (targetProperty.SetMethod.DeclaredAccessibility != Accessibility.Public && globbalTargetAccessor.Kind() != SyntaxKind.ThisExpression)
{
continue;
}
var mappingSource = mappingSourceFinder.FindMappingSource(targetProperty.Name, targetProperty.Type);
if (mappingSource == null)
{
continue;
}
if (IsMappingBetweenCollections(targetProperty.Type, mappingSource.ExpressionType))
{
var targetAccess = generator.MemberAccessExpression(localTargetIdentifier, targetProperty.Name);
var collectionMapping = MapCollections(mappingSource.Expression, mappingSource.ExpressionType, targetProperty.Type);
yield return(generator.CompleteAssignmentStatement(targetAccess, collectionMapping));
}
else if (ObjectHelper.IsSimpleType(targetProperty.Type) == false)
{
//TODO: What if both sides has the same type?
//TODO: Reverse flattening
var targetAccess = generator.MemberAccessExpression(localTargetIdentifier, targetProperty.Name);
foreach (var complexPropertyMappingNode in MapTypes(mappingSource.ExpressionType, targetProperty.Type, mappingSource.Expression, targetAccess))
{
yield return(complexPropertyMappingNode);
}
}
else
{
var targetAccess = generator.MemberAccessExpression(localTargetIdentifier, targetProperty.Name);
yield return(generator.CompleteAssignmentStatement(targetAccess, mappingSource.Expression));
}
}
if (globbalTargetAccessor == null)
{
yield return(generator.ContextualReturnStatement(localTargetIdentifier, generatorContext));
}
else if (targetExists == false)
{
yield return(generator.CompleteAssignmentStatement(globbalTargetAccessor, localTargetIdentifier));
}
}
public MappingSourceFinder(ITypeSymbol sourceType, SyntaxNode sourceGlobalAccessor, SyntaxGenerator generator, SemanticModel semanticModel)
{
this.sourceType = sourceType;
this.sourceGlobalAccessor = sourceGlobalAccessor;
this.generator = generator;
this.semanticModel = semanticModel;
this.sourceProperties = new Lazy <IReadOnlyList <IPropertySymbol> >(() => ObjectHelper.GetPublicPropertySymbols(sourceType).ToList());
this.sourceMethods = new Lazy <IReadOnlyList <IMethodSymbol> >(() => ObjectHelper.GetPublicGetMethods(sourceType).ToList());
}