public MappingElement MapExpression(MappingElement source, ITypeSymbol targetType, MappingContext mappingContext, MappingPath mappingPath = null)
{
if (source == null)
{
return(null);
}
if (mappingPath == null)
{
mappingPath = new MappingPath();
}
var sourceType = source.ExpressionType;
if (mappingPath.AddToMapped(sourceType) == false)
{
return(new MappingElement()
{
ExpressionType = sourceType,
Expression = source.Expression.WithTrailingTrivia(SyntaxFactory.Comment(" /* Stop recursive mapping */"))
});
}
if (mappingContext.FindConversion(sourceType, targetType) is {} userDefinedConversion)
{
return(new MappingElement()
{
ExpressionType = targetType,
Expression = (ExpressionSyntax)syntaxGenerator.InvocationExpression(userDefinedConversion, source.Expression)
});
}
if (ObjectHelper.IsSimpleType(targetType) && SymbolHelper.IsNullable(sourceType, out var underlyingType))
{
source = new MappingElement()
{
Expression = (ExpressionSyntax)syntaxGenerator.MemberAccessExpression(source.Expression, "Value"),
ExpressionType = underlyingType
};
}
if (IsUnwrappingNeeded(targetType, source))
{
return(TryToUnwrap(targetType, source, mappingContext));
}
if (ShouldCreateConversionBetweenTypes(targetType, sourceType))
{
return(TryToCreateMappingExpression(source, targetType, mappingPath, mappingContext));
}
return(source);
}
public async Task <ObjectCreationExpressionSyntax> AddInitializerWithMappingAsync(
ObjectCreationExpressionSyntax objectCreationExpression, IMappingMatcher mappingMatcher,
ITypeSymbol createdObjectTyp,
MappingContext mappingContext,
MappingPath mappingPath = null)
{
var propertiesToSet = _mappingTargetHelper.GetFieldsThaCanBeSetPublicly(createdObjectTyp, mappingContext);
var assignments = await MapUsingSimpleAssignment(propertiesToSet, mappingMatcher, mappingContext, mappingPath).ConfigureAwait(false);
return(SyntaxFactoryExtensions.WithMembersInitialization(objectCreationExpression, assignments));
}
public ObjectCreationExpressionSyntax AddInitializerWithMapping(
ObjectCreationExpressionSyntax objectCreationExpression, IMappingMatcher mappingMatcher,
ITypeSymbol createdObjectTyp,
MappingContext mappingContext,
MappingPath mappingPath = null)
{
var propertiesToSet = MappingTargetHelper.GetFieldsThaCanBeSetPublicly(createdObjectTyp, mappingContext);
var assignments = MapUsingSimpleAssignment(propertiesToSet, mappingMatcher, mappingContext, mappingPath).ToList();
return(SyntaxFactoryExtensions.WithMembersInitialization(objectCreationExpression, assignments));
}
public SyntaxNode CreateMappingLambda(string lambdaParameterName, ITypeSymbol sourceListElementType,
ITypeSymbol targetListElementType, MappingPath mappingPath, MappingContext mappingContext)
{
var source = new MappingElement()
{
ExpressionType = sourceListElementType,
Expression = syntaxGenerator.IdentifierName(lambdaParameterName) as ExpressionSyntax
};
var listElementMappingStm = MapExpression(source, targetListElementType, mappingContext, mappingPath);
return(syntaxGenerator.ValueReturningLambdaExpression(lambdaParameterName, listElementMappingStm.Expression));
}
public IEnumerable <ExpressionSyntax> MapUsingSimpleAssignment(IEnumerable <IPropertySymbol> targets, IMappingMatcher mappingMatcher,
MappingPath mappingPath = null, SyntaxNode globalTargetAccessor = null)
{
if (mappingPath == null)
{
mappingPath = new MappingPath();
}
return(mappingMatcher.MatchAll(targets, syntaxGenerator, globalTargetAccessor)
.Select(match =>
{
var sourceExpression = this.MapExpression(match.Source, match.Target.ExpressionType, mappingPath.Clone()).Expression;
return (ExpressionSyntax)syntaxGenerator.AssignmentStatement(match.Target.Expression, sourceExpression);
}).ToList());
}
public ObjectCreationExpressionSyntax AddInitializerWithMapping(
ObjectCreationExpressionSyntax objectCreationExpression, IMappingMatcher mappingMatcher,
ITypeSymbol createdObjectTyp,
MappingPath mappingPath = null)
{
var propertiesToSet = ObjectHelper.GetFieldsThaCanBeSetPublicly(createdObjectTyp, contextAssembly);
var assignments = MapUsingSimpleAssignment(propertiesToSet, mappingMatcher, mappingPath).ToList();
if (assignments.Count == 0)
{
return(objectCreationExpression);
}
var initializerExpressionSyntax = SyntaxFactory.InitializerExpression(SyntaxKind.ObjectInitializerExpression, new SeparatedSyntaxList <ExpressionSyntax>().AddRange(assignments)).FixInitializerExpressionFormatting(objectCreationExpression);
return(objectCreationExpression.WithInitializer(initializerExpressionSyntax));
}
protected override MappingElement TryToCreateMappingExpression(MappingElement source, ITypeSymbol targetType,
MappingPath mappingPath, MappingContext mappingContext)
{
//TODO: check if source is not null (conditional member access)
if (mappingPath.Length > 1 && source.ExpressionType.AllInterfaces.Any(x => x.Name == "ICloneable") && source.ExpressionType.SpecialType != SpecialType.System_Array)
{
var invokeClone = syntaxGenerator.InvocationExpression(syntaxGenerator.MemberAccessExpression(source.Expression, "Clone"));
var cloneMethods = targetType.GetMembers("Clone").OfType <IMethodSymbol>().Where(m => mappingContext.AccessibilityHelper.IsSymbolAccessible(m, targetType)).ToList();
if (cloneMethods.Any(IsGenericCloneMethod))
{
return(new MappingElement()
{
ExpressionType = targetType,
Expression = invokeClone as ExpressionSyntax
});
}
var objectClone = cloneMethods.FirstOrDefault(x => x.Parameters.Length == 0);
if (objectClone != null)
{
return(new MappingElement()
{
ExpressionType = targetType,
Expression = syntaxGenerator.TryCastExpression(invokeClone, targetType) as ExpressionSyntax
});
}
var implicitClone = targetType.GetMembers("System.ICloneable.Clone").FirstOrDefault();
if (implicitClone != null)
{
var castedOnICloneable = syntaxGenerator.CastExpression(SyntaxFactory.ParseTypeName("ICloneable"), source.Expression);
return(new MappingElement()
{
ExpressionType = targetType,
Expression = syntaxGenerator.TryCastExpression(syntaxGenerator.InvocationExpression(syntaxGenerator.MemberAccessExpression(castedOnICloneable, "Clone")), targetType) as ExpressionSyntax
});
}
}
return(base.TryToCreateMappingExpression(source, targetType, mappingPath, mappingContext));
}
private SyntaxNode MapCollections(SyntaxNode sourceAccess, ITypeSymbol sourceListType,
ITypeSymbol targetListType, MappingPath mappingPath, MappingContext mappingContext)
{
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, mappingContext);
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));
}
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)));
});
var mappingMatcher = new SingleSourceMatcher(restSourceFinder);
return(new MappingElement()
{
ExpressionType = targetType,
Expression = AddInitializerWithMapping(creationExpression, mappingMatcher, targetType, mappingPath)
});
}
}
var objectCreationExpressionSyntax = ((ObjectCreationExpressionSyntax)syntaxGenerator.ObjectCreationExpression(targetType));
var subMappingMatcher = new SingleSourceMatcher(subMappingSourceFinder);
return(new MappingElement()
{
ExpressionType = targetType,
Expression = AddInitializerWithMapping(objectCreationExpressionSyntax, subMappingMatcher, targetType, mappingPath)
});
}
public async Task <MappingElement> MapExpression(MappingElement source, AnnotatedType targetType, MappingContext mappingContext, MappingPath mappingPath = null)
{
if (source == null)
{
return(null);
}
if (mappingPath == null)
{
mappingPath = new MappingPath();
}
var sourceType = source.ExpressionType;
if (mappingPath.AddToMapped(sourceType.Type) == false)
{
return(new MappingElement()
{
ExpressionType = sourceType,
Expression = source.Expression.WithTrailingTrivia(SyntaxFactory.Comment(" /* Stop recursive mapping */")),
});
}
if (mappingContext.FindConversion(sourceType, targetType) is {} userDefinedConversion)
{
//TODO: Check if conversion accept nullable type
var invocationExpression = (ExpressionSyntax)syntaxGenerator.InvocationExpression(userDefinedConversion.Conversion, source.Expression);
var protectResultFromNull = targetType.CanBeNull == false && userDefinedConversion.ToType.CanBeNull;
var conversionExpression = protectResultFromNull ? OrFailWhenExpressionNull(invocationExpression) : invocationExpression;
return(new MappingElement
{
ExpressionType = targetType,
Expression = HandleSafeNull(source, userDefinedConversion.FromType, conversionExpression)
});
}
if (ObjectHelper.IsSimpleType(targetType.Type) && SymbolHelper.IsNullable(sourceType.Type, out var underlyingType))
{
return(new MappingElement
{
Expression = OrFailWhenArgumentNull(source.Expression),
ExpressionType = new AnnotatedType(underlyingType, false)
});
}
if (IsConversionToSimpleTypeNeeded(targetType.Type, source.ExpressionType.Type))
{
var conversion = ConvertToSimpleType(targetType, source, mappingContext);
if (targetType.CanBeNull == false && conversion.ExpressionType.CanBeNull)
{
return(new MappingElement
{
ExpressionType = conversion.ExpressionType.AsNotNull(),
Expression = OrFailWhenArgumentNull(conversion.Expression)
});
}
return(conversion);
}
if (ShouldCreateConversionBetweenTypes(targetType.Type, sourceType.Type))
{
return(await TryToCreateMappingExpression(source, targetType, mappingPath, mappingContext).ConfigureAwait(false));
}
if (source.ExpressionType.Type.Equals(targetType.Type) && source.ExpressionType.CanBeNull && targetType.CanBeNull == false)
{
return(new MappingElement
{
Expression = OrFailWhenArgumentNull(source.Expression),
ExpressionType = source.ExpressionType.AsNotNull()
});
}
return(source);
}
public async Task <ExpressionSyntax> CreateMappingLambdaAsync(string lambdaParameterName, AnnotatedType sourceListElementType, AnnotatedType targetListElementType, MappingPath mappingPath, MappingContext mappingContext)
{
var source = new MappingElement()
{
ExpressionType = sourceListElementType,
Expression = syntaxGenerator.IdentifierName(lambdaParameterName) as ExpressionSyntax,
};
var listElementMappingStm = await MapExpression(source, targetListElementType, mappingContext, mappingPath).ConfigureAwait(false);
return((ExpressionSyntax)syntaxGenerator.ValueReturningLambdaExpression(lambdaParameterName, listElementMappingStm.Expression));
}
private async Task <SyntaxNode> MapCollectionsAsync(MappingElement source, AnnotatedType targetListType, MappingPath mappingPath, MappingContext mappingContext)
{
var isReadonlyCollection = ObjectHelper.IsReadonlyCollection(targetListType.Type);
var sourceListElementType = MappingHelper.GetElementType(source.ExpressionType.Type);
var targetListElementType = MappingHelper.GetElementType(targetListType.Type);
if (sourceListElementType.CanBeNull && targetListElementType.CanBeNull == false)
{
var whereFilter = SyntaxFactoryExtensions.CreateMethodAccessExpression(source.Expression, source.ExpressionType.CanBeNull, $"OfType<{sourceListElementType.Type.Name}>");
var lambdaParameterName = NameHelper.CreateLambdaParameterName(source.Expression);
var mappingLambda = await CreateMappingLambdaAsync(lambdaParameterName, sourceListElementType.AsNotNull(), targetListElementType, mappingPath, mappingContext).ConfigureAwait(false);
var selectExpression = SyntaxFactoryExtensions.CreateMethodAccessExpression(whereFilter, false, "Select", mappingLambda);
var toList = AddMaterializeCollectionInvocation(syntaxGenerator, selectExpression, targetListType.Type, false);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toList, isReadonlyCollection, syntaxGenerator));
}
if (ShouldCreateConversionBetweenTypes(targetListElementType.Type, sourceListElementType.Type))
{
var useConvert = CanUseConvert(source.ExpressionType.Type);
var mapMethod = useConvert ? "ConvertAll": "Select";
var lambdaParameterName = NameHelper.CreateLambdaParameterName(source.Expression);
var mappingLambda = await CreateMappingLambdaAsync(lambdaParameterName, sourceListElementType, targetListElementType, mappingPath, mappingContext).ConfigureAwait(false);
var selectExpression = SyntaxFactoryExtensions.CreateMethodAccessExpression(source.Expression, source.ExpressionType.CanBeNull, mapMethod, mappingLambda);
var toList = useConvert? selectExpression: AddMaterializeCollectionInvocation(syntaxGenerator, selectExpression, targetListType.Type, false);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toList, isReadonlyCollection, syntaxGenerator));
}
var toListInvocation = AddMaterializeCollectionInvocation(syntaxGenerator, source.Expression, targetListType.Type, source.ExpressionType.CanBeNull);
return(MappingHelper.WrapInReadonlyCollectionIfNecessary(toListInvocation, isReadonlyCollection, syntaxGenerator));
}
public async Task <IReadOnlyList <AssignmentExpressionSyntax> > MapUsingSimpleAssignment(IReadOnlyCollection <IObjectField> targets,
IMappingMatcher mappingMatcher,
MappingContext mappingContext,
MappingPath mappingPath = null, SyntaxNode globalTargetAccessor = null)
{
if (mappingPath == null)
{
mappingPath = new MappingPath();
}
var results = new List <AssignmentExpressionSyntax>();
foreach (var match in await mappingMatcher.MatchAll(targets, syntaxGenerator, mappingContext, globalTargetAccessor).ConfigureAwait(false))
{
var sourceMappingElement = await MapExpression(match.Source, match.Target.ExpressionType, mappingContext, mappingPath.Clone()).ConfigureAwait(false);
var sourceExpression = sourceMappingElement.Expression;
if (sourceMappingElement.ExpressionType != match.Target.ExpressionType)
{
mappingContext.AddMissingConversion(sourceMappingElement.ExpressionType.Type, match.Target.ExpressionType.Type);
if (mappingContext.WrapInCustomConversion)
{
var customConversionMethodName = syntaxGenerator.IdentifierName($"MapFrom{sourceMappingElement.ExpressionType.Type.Name}To{match.Target.ExpressionType.Type.Name}");
sourceExpression = (ExpressionSyntax)syntaxGenerator.InvocationExpression(customConversionMethodName, sourceExpression);
}
}
var assignmentExpression = AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, match.Target.Expression, sourceExpression);
results.Add(assignmentExpression);
}
return(results);
}
protected virtual async Task <MappingElement> TryToCreateMappingExpression(MappingElement source, AnnotatedType targetType, MappingPath mappingPath, MappingContext mappingContext)
{
//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.Type as INamedTypeSymbol;
if (namedTargetType != null)
{
var directlyMappingConstructor = namedTargetType.Constructors.FirstOrDefault(c => c.Parameters.Length == 1 && c.Parameters[0].Type.Equals(source.ExpressionType.Type));
if (directlyMappingConstructor != null)
{
var creationExpression = CreateObject(targetType.Type, SyntaxFactory.ArgumentList().AddArguments(SyntaxFactory.Argument(source.Expression)));
var shouldProtectAgainstNull = directlyMappingConstructor.Parameters[0].Type.CanBeNull() == false && source.ExpressionType.CanBeNull;
return(new MappingElement
{
ExpressionType = targetType,
Expression = shouldProtectAgainstNull ? HandleSafeNull(source, targetType, creationExpression) : creationExpression
});
}
}
if (MappingHelper.IsMappingBetweenCollections(targetType.Type, source.ExpressionType.Type))
{
var shouldProtectAgainstNull = source.ExpressionType.CanBeNull && targetType.CanBeNull == false;
var collectionMapping = (await MapCollectionsAsync(source, targetType, mappingPath.Clone(), mappingContext).ConfigureAwait(false)) as ExpressionSyntax;
return(new MappingElement
{
ExpressionType = targetType,
Expression = shouldProtectAgainstNull ? OrFailWhenArgumentNull(collectionMapping, source.Expression.ToFullString()) : collectionMapping,
});
}
var subMappingSourceFinder = new ObjectMembersMappingSourceFinder(source.ExpressionType.AsNotNull(), source.Expression);
if (namedTargetType != null)
{
//maybe there is constructor that accepts parameter matching source properties
var constructorOverloadParameterSets = namedTargetType.Constructors.Select(x => x.Parameters);
var matchedOverload = await MethodHelper.FindBestParametersMatch(subMappingSourceFinder, constructorOverloadParameterSets, mappingContext).ConfigureAwait(false);
if (matchedOverload != null)
{
var argumentListSyntaxAsync = await matchedOverload.ToArgumentListSyntaxAsync(this, mappingContext).ConfigureAwait(false);
var creationExpression = CreateObject(targetType.Type, argumentListSyntaxAsync);
var matchedSources = matchedOverload.GetMatchedSources();
var restSourceFinder = new IgnorableMappingSourceFinder(subMappingSourceFinder, foundElement =>
{
return(matchedSources.Any(x => x.Expression.IsEquivalentTo(foundElement.Expression)));
});
var mappingMatcher = new SingleSourceMatcher(restSourceFinder);
return(new MappingElement()
{
ExpressionType = new AnnotatedType(targetType.Type),
Expression = await AddInitializerWithMappingAsync(creationExpression, mappingMatcher, targetType.Type, mappingContext, mappingPath).ConfigureAwait(false),
});
}
}
var objectCreationExpressionSyntax = CreateObject(targetType.Type);
var subMappingMatcher = new SingleSourceMatcher(subMappingSourceFinder);
var objectCreationWithInitializer = await AddInitializerWithMappingAsync(objectCreationExpressionSyntax, subMappingMatcher, targetType.Type, mappingContext, mappingPath).ConfigureAwait(false);
return(new MappingElement()
{
ExpressionType = new AnnotatedType(targetType.Type),
Expression = HandleSafeNull(source, targetType, objectCreationWithInitializer)
});
}