private static IEnumerable<SyntaxNode> GenerateMappingCode(IMethodSymbol methodSymbol, SyntaxGenerator generator, SemanticModel semanticModel)
{
var mappingEngine = new MappingEngine(semanticModel, generator);
if (SymbolHelper.IsPureMappingFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var targetType = methodSymbol.ReturnType;
var newExpression = mappingEngine.MapExpression((ExpressionSyntax)generator.IdentifierName(source.Name), source.Type, targetType);
return new[] { generator.ReturnStatement(newExpression) };
}
//TODO: Pure mapping with multiple parameters
if (SymbolHelper.IsUpdateParameterFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var target = methodSymbol.Parameters[1];
var targets = ObjectHelper.GetFieldsThaCanBeSetPublicly(target.Type);
var sourceFinder = new ObjectMembersMappingSourceFinder(source.Type, generator.IdentifierName(source.Name), generator);
return MappingHelper.MapUsingSimpleAssignment(generator, semanticModel, targets, sourceFinder, globalTargetAccessor: generator.IdentifierName(target.Name));
}
if (SymbolHelper.IsUpdateThisObjectFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var sourceFinder = new ObjectMembersMappingSourceFinder(source.Type, generator.IdentifierName(source.Name), generator);
var targets = ObjectHelper.GetFieldsThaCanBeSetPrivately(methodSymbol.ContainingType);
return MappingHelper.MapUsingSimpleAssignment(generator, semanticModel, targets, sourceFinder);
}
if (SymbolHelper.IsMultiParameterUpdateThisObjectFunction(methodSymbol))
{
var sourceFinder = new LocalScopeMappingSourceFinder(semanticModel, methodSymbol.Parameters);
var targets = ObjectHelper.GetFieldsThaCanBeSetPrivately(methodSymbol.ContainingType);
return MappingHelper.MapUsingSimpleAssignment(generator, semanticModel, targets, sourceFinder);
}
if (SymbolHelper.IsMappingConstructor(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var sourceFinder = new ObjectMembersMappingSourceFinder(source.Type, generator.IdentifierName(source.Name), generator);
var targets = ObjectHelper.GetFieldsThaCanBeSetFromConstructor(methodSymbol.ContainingType);
return MappingHelper.MapUsingSimpleAssignment(generator, semanticModel, targets, sourceFinder);
}
if (SymbolHelper.IsMultiParameterMappingConstructor(methodSymbol))
{
var sourceFinder = new LocalScopeMappingSourceFinder(semanticModel, methodSymbol.Parameters);
var targets = ObjectHelper.GetFieldsThaCanBeSetFromConstructor(methodSymbol.ContainingType);
return MappingHelper.MapUsingSimpleAssignment(generator, semanticModel, targets, sourceFinder);
}
return Enumerable.Empty<SyntaxNode>();
}
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 TryToRegisterRefactoring(CodeRefactoringContext context, SyntaxNode node)
{
switch (node)
{
case MethodDeclarationSyntax methodDeclaration:
if (methodDeclaration.Parent.Kind() != SyntaxKind.InterfaceDeclaration && methodDeclaration.ParameterList.Parameters.Count > 0)
{
var semanticModel = await context.Document.GetSemanticModelAsync();
var methodSymbol = semanticModel.GetDeclaredSymbol(methodDeclaration);
var allParameterHaveNames = methodSymbol.Parameters.All(x => string.IsNullOrWhiteSpace(x.Name) == false);
if (allParameterHaveNames == false)
{
return;
}
if (SymbolHelper.IsPureMappingFunction(methodSymbol) ||
SymbolHelper.IsMultiParameterPureFunction(methodSymbol) ||
SymbolHelper.IsUpdateThisObjectFunction(methodSymbol) ||
SymbolHelper.IsUpdateParameterFunction(methodSymbol) ||
SymbolHelper.IsMultiParameterUpdateThisObjectFunction(methodSymbol)
)
{
context.RegisterRefactoring(CodeAction.Create(title: title, createChangedDocument: c => GenerateMappingMethodBody(context.Document, methodDeclaration, c), equivalenceKey: title));
}
}
break;
case ConstructorDeclarationSyntax constructorDeclaration:
if (constructorDeclaration.ParameterList.Parameters.Count >= 1)
{
context.RegisterRefactoring(CodeAction.Create(title: title, createChangedDocument: c => GenerateMappingMethodBody(context.Document, constructorDeclaration, c), equivalenceKey: title));
}
break;
case IdentifierNameSyntax _:
case ParameterListSyntax _:
await TryToRegisterRefactoring(context, node.Parent);
break;
}
}
public sealed override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
var node = root.FindNode(context.Span);
switch (node)
{
case MethodDeclarationSyntax methodDeclaration:
if (methodDeclaration.ParameterList.Parameters.Count > 0)
{
var semanticModel = await context.Document.GetSemanticModelAsync();
var methodSymbol = semanticModel.GetDeclaredSymbol(methodDeclaration);
var allParameterHaveNames = methodSymbol.Parameters.All(x => string.IsNullOrWhiteSpace(x.Name) == false);
if (allParameterHaveNames == false)
{
return;
}
if (SymbolHelper.IsPureMappingFunction(methodSymbol) ||
SymbolHelper.IsUpdateThisObjectFunction(methodSymbol) ||
SymbolHelper.IsUpdateParameterFunction(methodSymbol) ||
SymbolHelper.IsMultiParameterUpdateThisObjectFunction(methodSymbol)
)
{
context.RegisterRefactoring(CodeAction.Create(title: title, createChangedDocument: c => GenerateMappingMethodBody(context.Document, methodDeclaration, c), equivalenceKey: title));
}
}
break;
case ConstructorDeclarationSyntax constructorDeclaration:
if (constructorDeclaration.ParameterList.Parameters.Count >= 1)
{
context.RegisterRefactoring(CodeAction.Create(title: title, createChangedDocument: c => GenerateMappingMethodBody(context.Document, constructorDeclaration, c), equivalenceKey: title));
}
break;
}
}
private void AnalyzeNode(SyntaxNodeAnalysisContext context)
{
var methodNode = context.Node as MethodDeclarationSyntax;
if (methodNode != null && methodNode.ParameterList.Parameters.Count > 0)
{
var methodSymbol = context.SemanticModel.GetDeclaredSymbol(methodNode);
var allParameterHaveNames = methodSymbol.Parameters.All(x => string.IsNullOrWhiteSpace(x.Name) == false);
if (allParameterHaveNames == false)
{
return;
}
if (SymbolHelper.IsPureMappingFunction(methodSymbol) ||
SymbolHelper.IsUpdateThisObjectFunction(methodSymbol) ||
SymbolHelper.IsUpdateParameterFunction(methodSymbol) ||
SymbolHelper.IsMultiParameterUpdateThisObjectFunction(methodSymbol)
)
{
var diagnostic = Diagnostic.Create(MappingMethodRule, methodNode.Identifier.GetLocation());
context.ReportDiagnostic(diagnostic);
}
}
}
private static IEnumerable <SyntaxNode> GenerateMappingCode(IMethodSymbol methodSymbol, SyntaxGenerator generator, SemanticModel semanticModel)
{
if (SymbolHelper.IsIdentityMappingFunction(methodSymbol))
{
var cloneMappingEngine = new CloneMappingEngine(semanticModel, generator, methodSymbol.ContainingAssembly);
var source = methodSymbol.Parameters[0];
var targetType = methodSymbol.ReturnType;
var newExpression = cloneMappingEngine.MapExpression((ExpressionSyntax)generator.IdentifierName(source.Name), source.Type, targetType);
return(new[] { generator.ReturnStatement(newExpression).WithAdditionalAnnotations(Formatter.Annotation) });
}
var mappingEngine = new MappingEngine(semanticModel, generator, methodSymbol.ContainingAssembly);
if (SymbolHelper.IsPureMappingFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var targetType = methodSymbol.ReturnType;
var newExpression = mappingEngine.MapExpression((ExpressionSyntax)generator.IdentifierName(source.Name), source.Type, targetType);
return(new[] { generator.ReturnStatement(newExpression).WithAdditionalAnnotations(Formatter.Annotation) });
}
if (SymbolHelper.IsMultiParameterPureFunction(methodSymbol))
{
var targetType = methodSymbol.ReturnType;
var sourceFinder = new LocalScopeMappingSourceFinder(semanticModel, methodSymbol);
var newExpression = mappingEngine.AddInitializerWithMapping((ObjectCreationExpressionSyntax)generator.ObjectCreationExpression(targetType), sourceFinder, targetType);
return(new[] { generator.ReturnStatement(newExpression).WithAdditionalAnnotations(Formatter.Annotation) });
}
if (SymbolHelper.IsUpdateParameterFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var target = methodSymbol.Parameters[1];
var targets = ObjectHelper.GetFieldsThaCanBeSetPublicly(target.Type, methodSymbol.ContainingAssembly);
var sourceFinder = new ObjectMembersMappingSourceFinder(source.Type, generator.IdentifierName(source.Name), generator);
return(mappingEngine.MapUsingSimpleAssignment(generator, targets, sourceFinder, globalTargetAccessor: generator.IdentifierName(target.Name)));
}
if (SymbolHelper.IsUpdateThisObjectFunction(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var sourceFinder = new ObjectMembersMappingSourceFinder(source.Type, generator.IdentifierName(source.Name), generator);
var targets = ObjectHelper.GetFieldsThaCanBeSetPrivately(methodSymbol.ContainingType);
return(mappingEngine.MapUsingSimpleAssignment(generator, targets, sourceFinder));
}
if (SymbolHelper.IsMultiParameterUpdateThisObjectFunction(methodSymbol))
{
var sourceFinder = new LocalScopeMappingSourceFinder(semanticModel, methodSymbol.Parameters);
var targets = ObjectHelper.GetFieldsThaCanBeSetPrivately(methodSymbol.ContainingType);
return(mappingEngine.MapUsingSimpleAssignment(generator, targets, sourceFinder));
}
if (SymbolHelper.IsMappingConstructor(methodSymbol))
{
var source = methodSymbol.Parameters[0];
var sourceFinder = new ObjectMembersMappingSourceFinder(source.Type, generator.IdentifierName(source.Name), generator);
var targets = ObjectHelper.GetFieldsThaCanBeSetFromConstructor(methodSymbol.ContainingType);
return(mappingEngine.MapUsingSimpleAssignment(generator, targets, sourceFinder));
}
if (SymbolHelper.IsMultiParameterMappingConstructor(methodSymbol))
{
var sourceFinder = new LocalScopeMappingSourceFinder(semanticModel, methodSymbol.Parameters);
var targets = ObjectHelper.GetFieldsThaCanBeSetFromConstructor(methodSymbol.ContainingType);
return(mappingEngine.MapUsingSimpleAssignment(generator, targets, sourceFinder));
}
return(Enumerable.Empty <SyntaxNode>());
}