/// <summary>
/// Gets the Thrift wire type associated with the specified type.
/// </summary>
public static ThriftType Get(Type type)
{
if (!_knownTypes.ContainsKey(type))
{
var thriftType = new ThriftType(type);
_knownTypes.TryAdd(type, thriftType);
// This has to be done this way because otherwise self-referencing types will loop
// since they'd call ThriftType.Get before they were themselves added to _knownTypes
switch (thriftType.Id)
{
case ThriftTypeId.Map:
thriftType.KeyType = ThriftType.Get(thriftType._collectionGenericArgs[0]);
thriftType.ValueType = ThriftType.Get(thriftType._collectionGenericArgs[1]);
break;
case ThriftTypeId.List:
case ThriftTypeId.Set:
if (thriftType.TypeInfo.IsArray)
{
thriftType.ElementType = ThriftType.Get(thriftType.TypeInfo.GetElementType());
}
else
{
thriftType.ElementType = ThriftType.Get(thriftType._collectionGenericArgs[0]);
}
break;
}
}
return(_knownTypes[type]);
}
/// <summary>
/// Initializes a new instance of the ThriftWireField class with the specified values.
/// </summary>
private ThriftWireField(short id, string name,
ThriftType wireType, TypeInfo underlyingTypeInfo,
ThriftWireFieldState state, object defaultValue,
ThriftConverter converter,
Expression getter, Func <Expression, Expression> setter)
{
Id = id;
Name = name;
WireType = wireType;
UnderlyingTypeInfo = underlyingTypeInfo;
Kind = state;
DefaultValue = defaultValue;
Converter = converter;
Getter = getter;
Setter = setter;
// NullChecker is required because UWP doesn't implement Equal/NotEqual on nullables.
if (getter != null)
{
if (Nullable.GetUnderlyingType(underlyingTypeInfo.AsType()) == null)
{
if (!underlyingTypeInfo.IsValueType)
{
NullChecker = Expression.Equal(
getter,
Expression.Constant(null)
);
}
}
else
{
// Can't use HasValue, not supported by UWP's expression interpreter
NullChecker = Expression.Call(
typeof(object),
"ReferenceEquals",
Type.EmptyTypes,
Expression.Convert(
getter,
typeof(object)
),
Expression.Constant(null)
);
}
}
}
/// <summary>
/// Creates an expression reading the specified map type.
/// </summary>
private static Expression CreateReaderForMap(ParameterExpression protocolParam, ThriftType thriftType)
{
var mapType = thriftType.TypeInfo.AsType();
var mapVar = Expression.Variable(mapType);
var headerVar = Expression.Variable(typeof(ThriftMapHeader));
var countVar = Expression.Variable(typeof(int));
var endOfLoop = Expression.Label();
return(Expression.Block(
mapType,
new[] { mapVar, headerVar, countVar },
Expression.Assign(
mapVar,
Expression.New(mapType)
),
Expression.Assign(
headerVar,
Expression.Call(protocolParam, Methods.IThriftProtocol_ReadMapHeader)
),
CreateTypeIdAssert(
thriftType.KeyType.Id,
Expression.Field(headerVar, Fields.ThriftMapHeader_KeyTypeId)
),
CreateTypeIdAssert(
thriftType.ValueType.Id,
Expression.Field(headerVar, Fields.ThriftMapHeader_ValueTypeId)
),
Expression.Assign(
countVar,
Expression.Constant(0)
),
Expression.Loop(
Expression.IfThenElse(
Expression.Equal(
countVar,
Expression.Field(headerVar, Fields.ThriftMapHeader_Count)
),
Expression.Break(endOfLoop),
Expression.Block(
Expression.Call(
mapVar,
"Add",
Types.None,
CreateReaderForType(protocolParam, thriftType.KeyType),
CreateReaderForType(protocolParam, thriftType.ValueType)
),
Expression.PostIncrementAssign(countVar)
)
),
endOfLoop
),
Expression.Call(protocolParam, Methods.IThriftProtocol_ReadMapEnd),
// return value
mapVar
));
}
/// <summary>
/// Creates an expression reading for the specified type.
/// </summary>
private static Expression CreateReaderForType(ParameterExpression protocolParam, ThriftType thriftType)
{
if (thriftType.NullableType != null)
{
return(Expression.Convert(
CreateReaderForType(protocolParam, thriftType.NullableType),
thriftType.TypeInfo.AsType()
));
}
switch (thriftType.Id)
{
case ThriftTypeId.Boolean:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadBoolean));
case ThriftTypeId.SByte:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadSByte));
case ThriftTypeId.Double:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadDouble));
case ThriftTypeId.Int16:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadInt16));
case ThriftTypeId.Int32:
if (thriftType.TypeInfo.IsEnum)
{
return(Expression.Convert(
Expression.Call(protocolParam, Methods.IThriftProtocol_ReadInt32),
thriftType.TypeInfo.AsType()
));
}
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadInt32));
case ThriftTypeId.Int64:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadInt64));
case ThriftTypeId.Binary:
if (thriftType.TypeInfo == TypeInfos.String)
{
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadString));
}
return(Expression.Call(protocolParam, Methods.IThriftProtocol_ReadBinary));
case ThriftTypeId.Map:
return(CreateReaderForMap(protocolParam, thriftType));
case ThriftTypeId.Set:
case ThriftTypeId.List:
if (thriftType.TypeInfo.IsArray)
{
return(CreateReaderForArray(protocolParam, thriftType));
}
return(CreateReaderForListOrSet(protocolParam, thriftType));
default:
return(Expression.Call(
typeof(ThriftStructReader),
"Read",
new[] { thriftType.TypeInfo.AsType() },
protocolParam
));
}
}
/// <summary>
/// Creates an expression reading the specified list or set type.
/// </summary>
private static Expression CreateReaderForListOrSet(ParameterExpression protocolParam, ThriftType thriftType)
{
var collectionType = thriftType.TypeInfo.AsType();
var collectionVar = Expression.Variable(collectionType);
var headerVar = Expression.Variable(typeof(ThriftCollectionHeader));
var countVar = Expression.Variable(typeof(int));
var endOfLoop = Expression.Label();
return(Expression.Block(
collectionType,
new[] { collectionVar, headerVar, countVar },
Expression.Assign(
headerVar,
Expression.Call(
protocolParam,
thriftType.Id == ThriftTypeId.List ? Methods.IThriftProtocol_ReadListHeader : Methods.IThriftProtocol_ReadSetHeader
)
),
CreateTypeIdAssert(
thriftType.ElementType.Id,
Expression.Field(headerVar, Fields.ThriftCollectionHeader_ElementTypeId)
),
Expression.Assign(
collectionVar,
Expression.New(collectionType)
),
Expression.Assign(
countVar,
Expression.Constant(0)
),
Expression.Loop(
Expression.IfThenElse(
Expression.Equal(
countVar,
Expression.Field(headerVar, Fields.ThriftCollectionHeader_Count)
),
Expression.Break(endOfLoop),
Expression.Block(
Expression.Call(
collectionVar,
"Add",
Types.None,
CreateReaderForType(protocolParam, thriftType.ElementType)
),
Expression.PostIncrementAssign(countVar)
)
),
endOfLoop
),
Expression.Call(
protocolParam,
thriftType.Id == ThriftTypeId.List ? Methods.IThriftProtocol_ReadListEnd : Methods.IThriftProtocol_ReadSetEnd
),
// return value
collectionVar
));
}
/// <summary>
/// Creates an expression reading the specified array type.
/// </summary>
private static Expression CreateReaderForArray(ParameterExpression protocolParam, ThriftType thriftType)
{
var arrayType = thriftType.TypeInfo.AsType();
var itemType = thriftType.ElementType.TypeInfo.AsType();
var arrayVar = Expression.Variable(arrayType);
var headerVar = Expression.Variable(typeof(ThriftCollectionHeader));
var lengthVar = Expression.Variable(typeof(int));
var endOfLoop = Expression.Label();
return(Expression.Block(
arrayType,
new[] { arrayVar, headerVar, lengthVar },
Expression.Assign(
headerVar,
Expression.Call(protocolParam, Methods.IThriftProtocol_ReadListHeader)
),
CreateTypeIdAssert(
thriftType.ElementType.Id,
Expression.Field(headerVar, Fields.ThriftCollectionHeader_ElementTypeId)
),
Expression.Assign(
arrayVar,
Expression.NewArrayBounds(
itemType,
Expression.Field(headerVar, Fields.ThriftCollectionHeader_Count)
)
),
Expression.Assign(
lengthVar,
Expression.Constant(0)
),
Expression.Loop(
Expression.IfThenElse(
Expression.Equal(
lengthVar,
Expression.Field(headerVar, Fields.ThriftCollectionHeader_Count)
),
Expression.Break(endOfLoop),
Expression.Block(
Expression.Assign(
Expression.ArrayAccess(
arrayVar,
lengthVar
),
CreateReaderForType(protocolParam, thriftType.ElementType)
),
Expression.PostIncrementAssign(lengthVar)
)
),
endOfLoop
),
Expression.Call(protocolParam, Methods.IThriftProtocol_ReadListEnd),
// return value
arrayVar
));
}
/// <summary>
/// Initializes a new instance of the ThriftType class from the specified .NET type.
/// </summary>
private ThriftType(Type type)
{
Id = ThriftTypeId.Empty;
TypeInfo = type.GetTypeInfo();
if (type == typeof(void))
{
return;
}
var underlyingNullableType = Nullable.GetUnderlyingType(type);
if (underlyingNullableType != null)
{
NullableType = ThriftType.Get(underlyingNullableType);
Id = NullableType.Id;
IsEnum = NullableType.IsEnum;
return;
}
if (PrimitiveIds.ContainsKey(type))
{
Id = PrimitiveIds[type];
return;
}
if (TypeInfo.IsEnum)
{
if (TypeInfo.GetCustomAttribute <ThriftEnumAttribute>() == null)
{
throw ThriftParsingException.EnumWithoutAttribute(TypeInfo);
}
if (Enum.GetUnderlyingType(type) != typeof(int))
{
throw ThriftParsingException.NonInt32Enum(TypeInfo);
}
Id = ThriftTypeId.Int32;
IsEnum = true;
return;
}
if (TypeInfo.IsValueType)
{
throw ThriftParsingException.UnknownValueType(TypeInfo);
}
if (TypeInfo.IsArray)
{
Id = ThriftTypeId.List;
return;
}
var mapInterfaceAndArgs = GetInstantiableVersion(TypeInfo, typeof(IDictionary <,>), typeof(Dictionary <,>), p => ThriftParsingException.UnsupportedMap(p));
if (mapInterfaceAndArgs != null)
{
Id = ThriftTypeId.Map;
TypeInfo = mapInterfaceAndArgs.Item1;
_collectionGenericArgs = mapInterfaceAndArgs.Item2;
}
var setInterfaceAndArgs = GetInstantiableVersion(TypeInfo, typeof(ISet <>), typeof(HashSet <>), p => ThriftParsingException.UnsupportedSet(p));
if (setInterfaceAndArgs != null)
{
if (mapInterfaceAndArgs != null)
{
throw ThriftParsingException.CollectionWithOrthogonalInterfaces(TypeInfo);
}
Id = ThriftTypeId.Set;
TypeInfo = setInterfaceAndArgs.Item1;
_collectionGenericArgs = setInterfaceAndArgs.Item2;
}
var listInterfaceAndArgs = GetInstantiableVersion(TypeInfo, typeof(IList <>), typeof(List <>), p => ThriftParsingException.UnsupportedList(p));
if (listInterfaceAndArgs != null)
{
if (mapInterfaceAndArgs != null || setInterfaceAndArgs != null)
{
throw ThriftParsingException.CollectionWithOrthogonalInterfaces(TypeInfo);
}
Id = ThriftTypeId.List;
TypeInfo = listInterfaceAndArgs.Item1;
_collectionGenericArgs = listInterfaceAndArgs.Item2;
}
if (Id == ThriftTypeId.Empty)
{
Id = ThriftTypeId.Struct;
}
}
/// <summary>
/// Initializes a new instance of the ThriftConvertibleValue class with the specified underlying type and converter.
/// </summary>
protected ThriftConvertibleValue(TypeInfo typeInfo, ThriftConverter converter)
{
WireType = ThriftType.Get(converter?.FromType ?? typeInfo.AsType());
Converter = converter;
}
/// <summary>
/// Creates an expression writing the specified array type.
/// </summary>
private static Expression CreateWriterForArray(ParameterExpression protocolParam, ThriftType thriftType, Expression value)
{
var counterVar = Expression.Variable(typeof(int));
var endOfLoop = Expression.Label();
return(Expression.Block(
new[] { counterVar },
Expression.Call(
protocolParam,
Methods.IThriftProtocol_WriteListHeader,
Expression.New(
Constructors.ThriftCollectionHeader,
Expression.Property(value, "Length"),
Expression.Constant(thriftType.ElementType.Id)
)
),
Expression.Assign(
counterVar,
Expression.Constant(0)
),
Expression.Loop(
Expression.IfThenElse(
Expression.LessThan(
counterVar,
Expression.Property(value, "Length")
),
Expression.Block(
CreateWriterForType(
protocolParam, thriftType.ElementType,
Expression.ArrayAccess(value, counterVar)
),
Expression.PostIncrementAssign(counterVar)
),
Expression.Break(endOfLoop)
),
endOfLoop
),
Expression.Call(
protocolParam,
Methods.IThriftProtocol_WriteListEnd
)
));
}
/// <summary>
/// Creates an expression writing the specified map type.
/// </summary>
private static Expression CreateWriterForMap(ParameterExpression protocolParam, ThriftType thriftType, Expression value)
{
// This code does not use IEnumerable.GetEnumerator, in order to use the "better" enumerator on collections
// that implement their own, e.g. List<T> has a struct-returning GetEnumerator(), and a ref-returning IEnumerable<T>.GetEnumerator()
var getEnumeratorMethod = thriftType.TypeInfo.AsType().GetRuntimeMethod("GetEnumerator", Types.None);
var endOfLoop = Expression.Label();
var enumeratorVar = Expression.Variable(getEnumeratorMethod.ReturnType);
return(Expression.Block(
new[] { enumeratorVar },
Expression.Call(
protocolParam,
Methods.IThriftProtocol_WriteMapHeader,
Expression.New(
Constructors.ThriftMapHeader,
Expression.Property(value, "Count"),
Expression.Constant(thriftType.KeyType.Id),
Expression.Constant(thriftType.ValueType.Id)
)
),
Expression.Assign(
enumeratorVar,
Expression.Call(value, getEnumeratorMethod)
),
Expression.Loop(
Expression.IfThenElse(
// Do not use IsTrue, not supported by UWP's expression interpreter
Expression.Equal(
Expression.Call(enumeratorVar, "MoveNext", Types.None),
Expression.Constant(true)
),
Expression.Block(
CreateWriterForType(
protocolParam, thriftType.KeyType,
Expression.Property(
Expression.Property(enumeratorVar, "Current"),
"Key"
)
),
CreateWriterForType(
protocolParam, thriftType.ValueType,
Expression.Property(
Expression.Property(enumeratorVar, "Current"),
"Value"
)
)
),
Expression.Break(endOfLoop)
),
endOfLoop
),
Expression.Call(protocolParam, Methods.IThriftProtocol_WriteMapEnd)
));
}
/// <summary>
/// Creates an expression writing the specified type.
/// </summary>
private static Expression CreateWriterForType(ParameterExpression protocolParam, ThriftType thriftType, Expression value)
{
switch (thriftType.Id)
{
case ThriftTypeId.Boolean:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteBoolean, value));
case ThriftTypeId.SByte:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteSByte, value));
case ThriftTypeId.Double:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteDouble, value));
case ThriftTypeId.Int16:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteInt16, value));
case ThriftTypeId.Int32:
if (thriftType.IsEnum)
{
value = Expression.Convert(value, typeof(int));
}
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteInt32, value));
case ThriftTypeId.Int64:
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteInt64, value));
case ThriftTypeId.Binary:
if (thriftType.TypeInfo == TypeInfos.String)
{
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteString, value));
}
return(Expression.Call(protocolParam, Methods.IThriftProtocol_WriteBinary, value));
case ThriftTypeId.Map:
return(CreateWriterForMap(protocolParam, thriftType, value));
case ThriftTypeId.Set:
case ThriftTypeId.List:
if (thriftType.TypeInfo.IsArray)
{
return(CreateWriterForArray(protocolParam, thriftType, value));
}
return(CreateWriterForListOrSet(protocolParam, thriftType, value));
default:
return(Expression.Call(
typeof(ThriftStructWriter),
"Write",
new[] { value.Type },
value, protocolParam
));
}
}
/// <summary>
/// Creates an expression writing the specified list or set type.
/// </summary>
private static Expression CreateWriterForListOrSet(ParameterExpression protocolParam, ThriftType thriftType, Expression value)
{
// same remark as in CreateWriterForMap
var getEnumeratorMethod = thriftType.TypeInfo.AsType().GetRuntimeMethod("GetEnumerator", Types.None);
var enumeratorVar = Expression.Variable(getEnumeratorMethod.ReturnType);
var endOfLoop = Expression.Label();
return(Expression.Block(
new[] { enumeratorVar },
Expression.Call(
protocolParam,
thriftType.Id == ThriftTypeId.List ? Methods.IThriftProtocol_WriteListHeader : Methods.IThriftProtocol_WriteSetHeader,
Expression.New(
Constructors.ThriftCollectionHeader,
Expression.Property(value, "Count"),
Expression.Constant(thriftType.ElementType.Id)
)
),
Expression.Assign(
enumeratorVar,
Expression.Call(value, getEnumeratorMethod)
),
Expression.Loop(
Expression.IfThenElse(
// Do not use IsTrue, not supported by UWP's expression interpreter
Expression.Equal(
Expression.Call(enumeratorVar, "MoveNext", Types.None),
Expression.Constant(true)
),
CreateWriterForType(
protocolParam, thriftType.ElementType,
Expression.Property(enumeratorVar, "Current")
),
Expression.Break(endOfLoop)
),
endOfLoop
),
Expression.Call(
protocolParam,
thriftType.Id == ThriftTypeId.List ? Methods.IThriftProtocol_WriteListEnd : Methods.IThriftProtocol_WriteSetEnd
)
));
}