public static AggregationExpression Translate(TranslationContext context, UnaryExpression expression)
{
if (expression.NodeType == ExpressionType.Convert)
{
var operandExpression = expression.Operand;
var operandTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, operandExpression);
var expressionType = expression.Type;
if (expressionType.IsConstructedGenericType && expressionType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
var valueType = expressionType.GetGenericArguments()[0];
if (operandExpression.Type == valueType)
{
// use the same AST but with a new nullable serializer
var nullableSerializerType = typeof(NullableSerializer <>).MakeGenericType(valueType);
var valueSerializerType = typeof(IBsonSerializer <>).MakeGenericType(valueType);
var constructorInfo = nullableSerializerType.GetConstructor(new[] { valueSerializerType });
var nullableSerializer = (IBsonSerializer)constructorInfo.Invoke(new[] { operandTranslation.Serializer });
return(new AggregationExpression(expression, operandTranslation.Ast, nullableSerializer));
}
}
var ast = AstExpression.Convert(operandTranslation.Ast, expressionType);
var serializer = context.KnownSerializersRegistry.GetSerializer(expression);
return(new AggregationExpression(expression, ast, serializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, NewExpression expression)
{
var listType = expression.Type;
var listItemType = listType.GetGenericArguments()[0];
var arguments = expression.Arguments;
if (arguments.Count == 1)
{
var argument = arguments[0];
var argumentType = argument.Type;
if (argumentType.IsConstructedGenericType && argumentType.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
var argumentItemType = argumentType.GetGenericArguments()[0];
if (argumentItemType == listItemType)
{
var collectionExpression = argument;
var collectionTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, collectionExpression);
var listSerializerType = typeof(EnumerableInterfaceImplementerSerializer <,>).MakeGenericType(listType, listItemType);
var listItemSerializer = ArraySerializerHelper.GetItemSerializer(collectionTranslation.Serializer);
var listSerializer = (IBsonSerializer)Activator.CreateInstance(listSerializerType, listItemSerializer);
return(new AggregationExpression(expression, collectionTranslation.Ast, listSerializer));
}
}
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, NewExpression expression)
{
var constructor = expression.Constructor;
var arguments = expression.Arguments;
if (constructor.IsOneOf(__dateTimeConstructors))
{
var yearExpression = arguments[0];
var monthExpression = arguments[1];
var dayExpression = arguments[2];
var hourExpression = arguments.Count >= 4 ? arguments[3] : null;
var minuteExpression = arguments.Count >= 4 ? arguments[4] : null;
var secondExpression = arguments.Count >= 4 ? arguments[5] : null;
var millisecondExpression = arguments.Count == 7 ? arguments[6] : null;
var yearTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, yearExpression);
var monthTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, monthExpression);
var dayTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, dayExpression);
var hourTranslation = hourExpression != null?ExpressionToAggregationExpressionTranslator.Translate(context, hourExpression) : null;
var minuteTranslation = minuteExpression != null?ExpressionToAggregationExpressionTranslator.Translate(context, minuteExpression) : null;
var secondTranslation = secondExpression != null?ExpressionToAggregationExpressionTranslator.Translate(context, secondExpression) : null;
var millisecondTranslation = millisecondExpression != null?ExpressionToAggregationExpressionTranslator.Translate(context, millisecondExpression) : null;
var ast = AstExpression.DateFromParts(yearTranslation.Ast, monthTranslation.Ast, dayTranslation.Ast, hourTranslation?.Ast, minuteTranslation?.Ast, secondTranslation?.Ast, millisecondTranslation?.Ast);
var serializer = context.KnownSerializersRegistry.GetSerializer(expression);
return(new AggregationExpression(expression, ast, serializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, UnaryExpression expression)
{
if (expression.NodeType == ExpressionType.ArrayLength)
{
var arrayExpression = expression.Operand;
var arrayTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, arrayExpression);
var ast = AstExpression.Size(arrayTranslation.Ast);
var serializer = BsonSerializer.LookupSerializer(expression.Type);
return(new AggregationExpression(expression, ast, serializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, NewArrayExpression expression)
{
var items = new List <AstExpression>();
foreach (var itemExpression in expression.Expressions)
{
var itemTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, itemExpression);
items.Add(itemTranslation.Ast);
}
var ast = AstExpression.ComputedArray(items);
var serializer = context.KnownSerializersRegistry.GetSerializer(expression);
return(new AggregationExpression(expression, ast, serializer));
}
public static AggregationExpression Translate(TranslationContext context, UnaryExpression expression)
{
switch (expression.NodeType)
{
case ExpressionType.Convert:
return(ConvertExpressionToAggregationExpressionTranslator.Translate(context, expression));
case ExpressionType.Not:
var operandTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, expression.Operand);
var ast = AstExpression.Not(operandTranslation.Ast);
return(new AggregationExpression(expression, ast, operandTranslation.Serializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, BinaryExpression expression)
{
if (expression.NodeType == ExpressionType.ArrayIndex)
{
var arrayExpression = expression.Left;
var arrayTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, arrayExpression);
var indexExpression = expression.Right;
var indexTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, indexExpression);
var ast = AstExpression.ArrayElemAt(arrayTranslation.Ast, indexTranslation.Ast);
var itemSerializer = ArraySerializerHelper.GetItemSerializer(arrayTranslation.Serializer);
return(new AggregationExpression(expression, ast, itemSerializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, MemberExpression expression)
{
var containerExpression = expression.Expression;
var member = expression.Member;
if (member is PropertyInfo property)
{
switch (property.Name)
{
case "HasValue": return(HasValuePropertyToAggregationExpressionTranslator.Translate(context, expression));
case "Value": return(ValuePropertyToAggregationExpressionTranslator.Translate(context, expression));
default: break;
}
}
var containerTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, containerExpression);
if (containerTranslation.Serializer is IWrappedValueSerializer wrappedValueSerializer)
{
var unwrappedValueAst = AstExpression.GetField(containerTranslation.Ast, wrappedValueSerializer.FieldName);
containerTranslation = new AggregationExpression(expression, unwrappedValueAst, wrappedValueSerializer.ValueSerializer);
}
if (!DocumentSerializerHelper.HasFieldInfo(containerTranslation.Serializer, member.Name))
{
if (member is PropertyInfo propertyInfo && propertyInfo.Name == "Length")
{
return(LengthPropertyToAggregationExpressionTranslator.Translate(context, expression));
}
if (TryTranslateCollectionCountProperty(expression, containerTranslation, member, out var translatedCount))
{
return(translatedCount);
}
if (TryTranslateDateTimeProperty(expression, containerTranslation, member, out var translatedDateTimeProperty))
{
return(translatedDateTimeProperty);
}
}
var fieldInfo = DocumentSerializerHelper.GetFieldInfo(containerTranslation.Serializer, member.Name);
var ast = AstExpression.GetField(containerTranslation.Ast, fieldInfo.ElementName);
return(new AggregationExpression(expression, ast, fieldInfo.Serializer));
}
public static AggregationExpression Translate(TranslationContext context, ConditionalExpression expression)
{
if (expression.NodeType == ExpressionType.Conditional)
{
var testExpression = expression.Test;
var testTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, testExpression);
var ifTrueExpression = expression.IfTrue;
var ifTrueTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, ifTrueExpression);
var ifFalseExpression = expression.IfFalse;
var ifFalseTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, ifFalseExpression);
var ast = AstExpression.Cond(testTranslation.Ast, ifTrueTranslation.Ast, ifFalseTranslation.Ast);
var serializer = context.KnownSerializersRegistry.GetSerializer(expression);
return(new AggregationExpression(expression, ast, serializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, NewExpression expression)
{
if (expression.Type == typeof(DateTime))
{
return(NewDateTimeExpressionToAggregationExpressionTranslator.Translate(context, expression));
}
if (expression.Type.IsConstructedGenericType && expression.Type.GetGenericTypeDefinition() == typeof(HashSet <>))
{
return(NewHashSetExpressionToAggregationExpressionTranslator.Translate(context, expression));
}
if (expression.Type.IsConstructedGenericType && expression.Type.GetGenericTypeDefinition() == typeof(List <>))
{
return(NewListExpressionToAggregationExpressionTranslator.Translate(context, expression));
}
var classMapType = typeof(BsonClassMap <>).MakeGenericType(expression.Type);
var classMap = (BsonClassMap)Activator.CreateInstance(classMapType);
var computedFields = new List <AstComputedField>();
for (var i = 0; i < expression.Members.Count; i++)
{
var member = expression.Members[i];
var fieldExpression = expression.Arguments[i];
var fieldTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, fieldExpression);
var memberSerializer = fieldTranslation.Serializer ?? BsonSerializer.LookupSerializer(fieldExpression.Type);
var defaultValue = GetDefaultValue(memberSerializer.ValueType);
classMap.MapProperty(member.Name).SetSerializer(memberSerializer).SetDefaultValue(defaultValue);
computedFields.Add(AstExpression.ComputedField(member.Name, fieldTranslation.Ast));
}
var constructorInfo = expression.Constructor;
var constructorArgumentNames = expression.Members.Select(m => m.Name).ToArray();
classMap.MapConstructor(constructorInfo, constructorArgumentNames);
classMap.Freeze();
var ast = AstExpression.ComputedDocument(computedFields);
var serializerType = typeof(BsonClassMapSerializer <>).MakeGenericType(expression.Type);
// Note that we should use context.KnownSerializersRegistry to find the serializer,
// but the above implementation builds up computedFields during the mapping process.
// We need to figure out how to resolve the serializer from KnownSerializers and then
// populate computedFields from that resolved serializer.
var serializer = (IBsonSerializer)Activator.CreateInstance(serializerType, classMap);
return(new AggregationExpression(expression, ast, serializer));
}
public static AggregationExpression Translate(TranslationContext context, MemberInitExpression expression)
{
var classSerializer = BsonSerializer.LookupSerializer(expression.Type);
if (classSerializer is IBsonDocumentSerializer documentSerializer)
{
var computedFields = new List <AstComputedField>();
var newExpression = expression.NewExpression;
var constructorParameters = newExpression.Constructor.GetParameters();
var constructorArguments = newExpression.Arguments;
for (var i = 0; i < constructorParameters.Length; i++)
{
var constructorParameter = constructorParameters[i];
var argumentExpression = constructorArguments[i];
var fieldName = GetFieldName(constructorParameter);
var argumentTanslation = ExpressionToAggregationExpressionTranslator.Translate(context, argumentExpression);
computedFields.Add(AstExpression.ComputedField(fieldName, argumentTanslation.Ast));
}
foreach (var binding in expression.Bindings)
{
var memberAssignment = (MemberAssignment)binding;
var member = memberAssignment.Member;
if (!(documentSerializer.TryGetMemberSerializationInfo(member.Name, out var memberSerializationInfo)))
{
throw new ExpressionNotSupportedException(expression);
}
var elementName = memberSerializationInfo.ElementName;
var valueExpression = memberAssignment.Expression;
var valueTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, valueExpression);
computedFields.Add(AstExpression.ComputedField(elementName, valueTranslation.Ast));
}
var ast = AstExpression.ComputedDocument(computedFields);
var serializer = context.KnownSerializersRegistry.GetSerializer(expression);
return(new AggregationExpression(expression, ast, serializer));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, BinaryExpression expression, MethodCallExpression getCharsExpression)
{
var method = getCharsExpression.Method;
var arguments = getCharsExpression.Arguments;
if (method.Is(StringMethod.GetChars))
{
var comparisonOperator = GetComparisonOperator(expression);
var objectExpression = getCharsExpression.Object;
var objectTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, objectExpression);
var indexExpression = arguments[0];
var indexTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, indexExpression);
var comparandExpression = expression.Right;
var c = (char)comparandExpression.GetConstantValue <int>(expression);
var comparand = new string(c, 1);
var ast = AstExpression.Comparison(
comparisonOperator,
AstExpression.SubstrCP(objectTranslation.Ast, indexTranslation.Ast, 1),
comparand);
return(new AggregationExpression(expression, ast, new BooleanSerializer()));
}
throw new ExpressionNotSupportedException(expression);
}
public static AggregationExpression Translate(TranslationContext context, BinaryExpression expression)
{
if (StringGetCharsComparisonExpressionToAggregationExpressionTranslator.CanTranslate(expression, out var getCharsExpression))
{
return(StringGetCharsComparisonExpressionToAggregationExpressionTranslator.Translate(context, expression, getCharsExpression));
}
var leftExpression = expression.Left;
var rightExpression = expression.Right;
if (IsArithmeticExpression(expression))
{
leftExpression = ConvertHelper.RemoveWideningConvert(leftExpression);
rightExpression = ConvertHelper.RemoveWideningConvert(rightExpression);
}
if (IsEnumComparisonExpression(expression))
{
leftExpression = ConvertHelper.RemoveConvertToEnumUnderlyingType(leftExpression);
rightExpression = ConvertHelper.RemoveConvertToEnumUnderlyingType(rightExpression);
}
var leftTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, leftExpression);
var rightTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, rightExpression);
var ast = expression.NodeType switch
{
ExpressionType.Add => IsStringConcatenationExpression(expression) ?
AstExpression.Concat(leftTranslation.Ast, rightTranslation.Ast) :
AstExpression.Add(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.And => AstExpression.And(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.AndAlso => AstExpression.And(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Coalesce => AstExpression.IfNull(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Divide => AstExpression.Divide(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Equal => AstExpression.Eq(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.GreaterThan => AstExpression.Gt(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.GreaterThanOrEqual => AstExpression.Gte(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.LessThan => AstExpression.Lt(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.LessThanOrEqual => AstExpression.Lte(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Modulo => AstExpression.Mod(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Multiply => AstExpression.Multiply(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.NotEqual => AstExpression.Ne(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Or => AstExpression.Or(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.OrElse => AstExpression.Or(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Power => AstExpression.Pow(leftTranslation.Ast, rightTranslation.Ast),
ExpressionType.Subtract => AstExpression.Subtract(leftTranslation.Ast, rightTranslation.Ast),
_ => throw new ExpressionNotSupportedException(expression)
};
var serializer = expression.Type switch
{
Type t when t == typeof(bool) => new BooleanSerializer(),
Type t when t == typeof(string) => new StringSerializer(),
Type t when t == typeof(byte) => new ByteSerializer(),
Type t when t == typeof(short) => new Int16Serializer(),
Type t when t == typeof(ushort) => new UInt16Serializer(),
Type t when t == typeof(int) => new Int32Serializer(),
Type t when t == typeof(uint) => new UInt32Serializer(),
Type t when t == typeof(long) => new Int64Serializer(),
Type t when t == typeof(ulong) => new UInt64Serializer(),
Type t when t == typeof(float) => new SingleSerializer(),
Type t when t == typeof(double) => new DoubleSerializer(),
Type t when t == typeof(decimal) => new DecimalSerializer(),
Type {
IsConstructedGenericType : true
} t when t.GetGenericTypeDefinition() == typeof(Nullable <>) => (IBsonSerializer)Activator.CreateInstance(typeof(NullableSerializer <>).MakeGenericType(t.GenericTypeArguments[0])),
Type
{
IsArray : true
}
t => (IBsonSerializer)Activator.CreateInstance(typeof(ArraySerializer <>).MakeGenericType(t.GetElementType())),
_ => context.KnownSerializersRegistry.GetSerializer(expression) // Required for Coalesce
};
return(new AggregationExpression(expression, ast, serializer));
}