private IEnumerable <Expression> CreateUnpackExpressions(ParameterExpression unpackerParameter, ParameterExpression itemSerializersParameter, Type[] itemSerializerTypes, IList <Type> flattenTypes)
{
for (int number = 0; number < flattenTypes.Count; number++)
{
/*
* checked
* {
* if (!unpacker.Read())
* {
* throw SerializationExceptions.NewMissingItem(0);
* }
*
* T1 item1;
* if (!unpacker.IsArrayHeader && !unpacker.IsMapHeader)
* {
* item1 = this._serializer0.UnpackFrom(unpacker);
* }
* else
* {
* using (Unpacker subtreeUnpacker = unpacker.ReadSubtree())
* {
* item1 = this._serializer0.UnpackFrom(subtreeUnpacker);
* }
* }
*
* if (!unpacker.Read())
* :
*
* return new Tuple<...>( item1, ... , new Tuple<...>(...)...);
* }
*/
// Express above statement as expressions like functional.
yield return
(Expression.Block(
flattenTypes[number],
Expression.IfThen(
Expression.IsFalse(
Expression.Call(
unpackerParameter,
Metadata._Unpacker.Read
)
),
Expression.Call(
SerializationExceptions.NewMissingItemMethod,
Expression.Constant(number)
)
),
ExpressionSerializerLogics.CreateUnpackItem(
unpackerParameter,
Metadata._UnpackHelpers.InvokeUnpackFrom_1Method.MakeGenericMethod(flattenTypes[number]),
Expression.ArrayIndex(
itemSerializersParameter,
Expression.Constant(number)
),
itemSerializerTypes[number]
)
));
}
}
public ListExpressionMessagePackSerializer(SerializationContext context, CollectionTraits traits)
: base(context, traits)
{
Type type = typeof(T);
if (type.GetIsAbstract())
{
type = context.DefaultCollectionTypes.GetConcreteType(typeof(T)) ?? type;
}
if (type.IsArray)
{
var capacityParameter = Expression.Parameter(typeof(int), "length");
this._createInstanceWithCapacity =
Expression.Lambda <Func <int, T> >(
Expression.NewArrayBounds(type.GetElementType(), capacityParameter),
capacityParameter
).Compile();
this._createInstance = null;
}
else if (type.GetIsAbstract())
{
this._createInstance = () => { throw SerializationExceptions.NewNotSupportedBecauseCannotInstanciateAbstractType(type); };
this._createInstanceWithCapacity = null;
}
else
{
var constructor = ExpressionSerializerLogics.GetCollectionConstructor(context, type);
if (constructor == null)
{
this._createInstance = () => { throw SerializationExceptions.NewTargetDoesNotHavePublicDefaultConstructorNorInitialCapacity(type); };
this._createInstanceWithCapacity = null;
}
else
{
if (constructor.GetParameters().Length == 1)
{
this._createInstance = null;
var capacityParameter = Expression.Parameter(typeof(int), "parameter");
this._createInstanceWithCapacity =
Expression.Lambda <Func <int, T> >(
Expression.New(constructor, capacityParameter),
capacityParameter
).Compile();
}
else
{
this._createInstanceWithCapacity = null;
this._createInstance =
Expression.Lambda <Func <T> >(
Expression.New(constructor)
).Compile();
}
}
}
}
/// <summary>
/// Creates an <see cref="Expression"/> which unpack an item.
/// </summary>
/// <param name="unpackerParameter">The parameter <see cref="Expression"/> which holds the unpacker.</param>
/// <param name="unpackFrom">The target <c>UnpackFrom</c> method of the serializer for item type.</param>
/// <param name="serializerParameter">The parameter <see cref="Expression"/> which has <c>UnpackFrom </c>will be invoked.</param>
/// <param name="serializerType">The type of the item serializer.</param>
/// <returns>An <see cref="Expression"/> which unpack an item.</returns>
public static Expression CreateUnpackItem(Expression unpackerParameter, MethodInfo unpackFrom, Expression serializerParameter, Type serializerType)
{
return
(Expression.Condition(
Expression.AndAlso(
Expression.IsFalse(
Expression.Property(unpackerParameter, Metadata._Unpacker.IsArrayHeader)
),
Expression.IsFalse(
Expression.Property(unpackerParameter, Metadata._Unpacker.IsMapHeader)
)
),
unpackFrom.IsStatic
? Expression.Call(
null,
unpackFrom,
Expression.TypeAs(serializerParameter, serializerType),
unpackerParameter
) : Expression.Call(
Expression.TypeAs(serializerParameter, serializerType),
unpackFrom,
unpackerParameter
),
ExpressionSerializerLogics.Using(
typeof(Unpacker),
unpackFrom.ReturnType,
Expression.Call(
unpackerParameter,
Metadata._Unpacker.ReadSubtree
),
usingVariable =>
unpackFrom.IsStatic
? Expression.Call(
null,
unpackFrom,
Expression.TypeAs(serializerParameter, serializerType),
usingVariable
) : Expression.Call(
Expression.TypeAs(serializerParameter, serializerType),
unpackFrom,
usingVariable
)
)
));
}
protected SequenceExpressionMessagePackSerializer(SerializationContext context, CollectionTraits traits)
{
Contract.Assert(typeof(T).IsArray || typeof(IEnumerable).IsAssignableFrom(typeof(T)), typeof(T) + " is not array nor IEnumerable");
this._traits = traits;
this._elementSerializer = context.GetSerializer(traits.ElementType);
this._getCount = ExpressionSerializerLogics.CreateGetCount <T>(traits);
var packerParameter = Expression.Parameter(typeof(Packer), "packer");
var objectTreeParameter = Expression.Parameter(typeof(T), "objectTree");
var elementSerializerParameter = Expression.Parameter(typeof(IMessagePackSerializer), "elementSerializer");
var elementSerializerType = typeof(MessagePackSerializer <>).MakeGenericType(traits.ElementType);
/*
* packer.PackArrayHeader( objectTree.Count() );
* foreach( var item in objectTree )
* {
* elementSerializer.PackTo( packer, item );
* }
*/
var packToCore =
Expression.Lambda <Action <Packer, T, IMessagePackSerializer> >(
Expression.Block(
Expression.Call(
packerParameter,
Metadata._Packer.PackArrayHeader,
ExpressionSerializerLogics.CreateGetCountExpression <T>(traits, objectTreeParameter)
),
traits.AddMethod == null
? ExpressionSerializerLogics.For(
Expression.ArrayLength(objectTreeParameter),
indexVariable =>
Expression.Call(
Expression.TypeAs(elementSerializerParameter, elementSerializerType),
typeof(MessagePackSerializer <>).MakeGenericType(traits.ElementType).GetMethod("PackTo"),
packerParameter,
Expression.ArrayIndex(objectTreeParameter, indexVariable)
)
)
: ExpressionSerializerLogics.ForEach(
objectTreeParameter,
traits,
elementVariable =>
Expression.Call(
Expression.TypeAs(elementSerializerParameter, elementSerializerType),
typeof(MessagePackSerializer <>).MakeGenericType(traits.ElementType).GetMethod("PackTo"),
packerParameter,
elementVariable
)
)
),
packerParameter, objectTreeParameter, elementSerializerParameter
);
#if !SILVERLIGHT
if (context.GeneratorOption == SerializationMethodGeneratorOption.CanDump)
{
this._packToCoreExpression = packToCore;
}
#endif
this._packToCore = packToCore.Compile();
var unpackerParameter = Expression.Parameter(typeof(Unpacker), "unpacker");
var instanceParameter = Expression.Parameter(typeof(T), "instance");
var countParamter = Expression.Parameter(typeof(int), "count");
/*
* for ( int i = 0; i < count; i++ )
* {
* if ( !unpacker.Read() )
* {
* throw SerializationExceptions.NewMissingItem( i );
* }
*
* T item;
* if ( !unpacker.IsArrayHeader && !unpacker.IsMapHeader )
* {
* item = this.ElementSerializer.UnpackFrom( unpacker );
* }
* else
* {
* using ( Unpacker subtreeUnpacker = unpacker.ReadSubtree() )
* {
* item = this.ElementSerializer.UnpackFrom( subtreeUnpacker );
* }
* }
*
* instance[ i ] = item; -- OR -- instance.Add( item );
* }
*/
// FIXME: use UnpackHelper
Expression <Action <Unpacker, T, IMessagePackSerializer> > unpackToCore;
if (typeof(T).IsArray)
{
unpackToCore =
Expression.Lambda <Action <Unpacker, T, IMessagePackSerializer> >(
Expression.Call(
null,
_UnpackHelpers.UnpackArrayTo_1.MakeGenericMethod(traits.ElementType),
unpackerParameter,
Expression.TypeAs(elementSerializerParameter, typeof(MessagePackSerializer <>).MakeGenericType(traits.ElementType)),
instanceParameter
),
unpackerParameter, instanceParameter, elementSerializerParameter
);
}
else if (typeof(T).GetIsGenericType())
{
MethodInfo unpackCollectionToMethod;
Type delegateType;
if (traits.AddMethod.ReturnType == null || traits.AddMethod.ReturnType == typeof(void))
{
unpackCollectionToMethod = _UnpackHelpers.UnpackCollectionTo_1.MakeGenericMethod(traits.ElementType);
delegateType = typeof(Action <>).MakeGenericType(traits.ElementType);
}
else
{
unpackCollectionToMethod = _UnpackHelpers.UnpackCollectionTo_2.MakeGenericMethod(traits.ElementType, traits.AddMethod.ReturnType);
delegateType = typeof(Func <,>).MakeGenericType(traits.ElementType, traits.AddMethod.ReturnType);
}
var itemParameter = Expression.Parameter(traits.ElementType, "item");
unpackToCore =
Expression.Lambda <Action <Unpacker, T, IMessagePackSerializer> >(
Expression.Call(
null,
unpackCollectionToMethod,
unpackerParameter,
Expression.TypeAs(elementSerializerParameter, typeof(MessagePackSerializer <>).MakeGenericType(traits.ElementType)),
Expression.TypeAs(instanceParameter, typeof(IEnumerable <>).MakeGenericType(traits.ElementType)),
Expression.Lambda(
delegateType,
Expression.Call(
instanceParameter,
traits.AddMethod,
itemParameter
),
itemParameter
)
),
unpackerParameter, instanceParameter, elementSerializerParameter
);
}
else
{
MethodInfo unpackCollectionToMethod;
Type delegateType;
if (traits.AddMethod.ReturnType == null || traits.AddMethod.ReturnType == typeof(void))
{
unpackCollectionToMethod = _UnpackHelpers.UnpackNonGenericCollectionTo;
delegateType = typeof(Action <>).MakeGenericType(traits.ElementType);
}
else
{
unpackCollectionToMethod = _UnpackHelpers.UnpackNonGenericCollectionTo_1.MakeGenericMethod(traits.AddMethod.ReturnType);
delegateType = typeof(Func <,>).MakeGenericType(traits.ElementType, traits.AddMethod.ReturnType);
}
var itemParameter = Expression.Parameter(traits.ElementType, "item");
unpackToCore =
Expression.Lambda <Action <Unpacker, T, IMessagePackSerializer> >(
Expression.Call(
null,
unpackCollectionToMethod,
unpackerParameter,
Expression.TypeAs(instanceParameter, typeof(IEnumerable)),
Expression.Lambda(
delegateType,
Expression.Call(
instanceParameter,
traits.AddMethod,
itemParameter
),
itemParameter
)
),
unpackerParameter, instanceParameter, elementSerializerParameter
);
}
#if !SILVERLIGHT
if (context.GeneratorOption == SerializationMethodGeneratorOption.CanDump)
{
this._unpackToCoreExpression = unpackToCore;
}
#endif
this._unpackToCore = unpackToCore.Compile();
}
public MapExpressionMessagePackSerializer(SerializationContext context, CollectionTraits traits)
{
Contract.Assert(typeof(IEnumerable).IsAssignableFrom(typeof(T)), typeof(T) + " is IEnumerable");
Contract.Assert(traits.ElementType == typeof(DictionaryEntry) || (traits.ElementType.GetIsGenericType() && traits.ElementType.GetGenericTypeDefinition() == typeof(KeyValuePair <,>)), "Element type " + traits.ElementType + " is not KeyValuePair<TKey,TValue>.");
this._traits = traits;
this._keySerializer = traits.ElementType.GetIsGenericType() ? context.GetSerializer(traits.ElementType.GetGenericArguments()[0]) : context.GetSerializer(typeof(MessagePackObject));
this._valueSerializer = traits.ElementType.GetIsGenericType() ? context.GetSerializer(traits.ElementType.GetGenericArguments()[1]) : context.GetSerializer(typeof(MessagePackObject));
this._getCount = ExpressionSerializerLogics.CreateGetCount <T>(traits);
var constructor = ExpressionSerializerLogics.GetCollectionConstructor <T>();
if (constructor == null)
{
this._createInstance = () => { throw SerializationExceptions.NewTargetDoesNotHavePublicDefaultConstructorNorInitialCapacity(typeof(T)); };
this._createInstanceWithCapacity = null;
}
else if (constructor.GetParameters().Length == 1)
{
this._createInstance = null;
var capacityParameter = Expression.Parameter(typeof(int), "parameter");
this._createInstanceWithCapacity =
Expression.Lambda <Func <int, T> >(
Expression.New(constructor, capacityParameter),
capacityParameter
).Compile();
}
else
{
this._createInstanceWithCapacity = null;
this._createInstance =
Expression.Lambda <Func <T> >(
Expression.New(constructor)
).Compile();
}
var packerParameter = Expression.Parameter(typeof(Packer), "packer");
var objectTreeParameter = Expression.Parameter(typeof(T), "objectTree");
var keySerializerParameter = Expression.Parameter(typeof(IMessagePackSerializer), "keySerializer");
var valueSerializerParameter = Expression.Parameter(typeof(IMessagePackSerializer), "valueSerializer");
var keyType = traits.ElementType.GetIsGenericType() ? traits.ElementType.GetGenericArguments()[0] : typeof(MessagePackObject);
var valueType = traits.ElementType.GetIsGenericType() ? traits.ElementType.GetGenericArguments()[1] : typeof(MessagePackObject);
var keySerializerType = typeof(MessagePackSerializer <>).MakeGenericType(keyType);
var valueSerializerType = typeof(MessagePackSerializer <>).MakeGenericType(valueType);
/*
* packer.PackMapHeader( objectTree.Count() );
* foreach( var item in objectTree )
* {
* elementSerializer.PackTo( packer, item.Key );
* elementSerializer.PackTo( packer, item.Value );
* }
*/
var packToCore =
Expression.Lambda <Action <Packer, T, IMessagePackSerializer, IMessagePackSerializer> >(
Expression.Block(
Expression.Call(
packerParameter,
Metadata._Packer.PackMapHeader,
ExpressionSerializerLogics.CreateGetCountExpression <T>(traits, objectTreeParameter)
),
ExpressionSerializerLogics.ForEach(
objectTreeParameter,
traits,
elementVariable =>
Expression.Block(
Expression.Call(
Expression.TypeAs(keySerializerParameter, keySerializerType),
typeof(MessagePackSerializer <>).MakeGenericType(keyType).GetMethod("PackTo"),
packerParameter,
traits.ElementType.GetIsGenericType()
? Expression.Property(elementVariable, traits.ElementType.GetProperty("Key")) as Expression
: Expression.Unbox(Expression.Property(elementVariable, traits.ElementType.GetProperty("Key")), typeof(MessagePackObject))
),
Expression.Call(
Expression.TypeAs(valueSerializerParameter, valueSerializerType),
typeof(MessagePackSerializer <>).MakeGenericType(valueType).GetMethod("PackTo"),
packerParameter,
traits.ElementType.GetIsGenericType()
? Expression.Property(elementVariable, traits.ElementType.GetProperty("Value")) as Expression
: Expression.Unbox(Expression.Property(elementVariable, traits.ElementType.GetProperty("Value")), typeof(MessagePackObject))
)
)
)
), packerParameter, objectTreeParameter, keySerializerParameter, valueSerializerParameter
);
#if !SILVERLIGHT
if (context.GeneratorOption == SerializationMethodGeneratorOption.CanDump)
{
this._packToCoreExpression = packToCore;
}
#endif
this._packToCore = packToCore.Compile();
var unpackerParameter = Expression.Parameter(typeof(Unpacker), "unpacker");
var instanceParameter = Expression.Parameter(typeof(T), "instance");
var countParamter = Expression.Parameter(typeof(int), "count");
Expression <Action <Unpacker, T, IMessagePackSerializer, IMessagePackSerializer> > unpackToCore;
if (traits.ElementType.GetIsGenericType())
{
/*
* UnpackHelpers.UnpackMapTo<TKey,TValue>( unpacker, keySerializer, valueSerializer, instance );
*/
unpackToCore =
Expression.Lambda <Action <Unpacker, T, IMessagePackSerializer, IMessagePackSerializer> >(
Expression.Call(
Metadata._UnpackHelpers.UnpackMapTo_2.MakeGenericMethod(keyType, valueType),
unpackerParameter,
Expression.TypeAs(keySerializerParameter, keySerializerType),
Expression.TypeAs(valueSerializerParameter, valueSerializerType),
Expression.TypeAs(instanceParameter, typeof(IDictionary <,>).MakeGenericType(keyType, valueType))
),
unpackerParameter, instanceParameter, keySerializerParameter, valueSerializerParameter
);
}
else
{
/*
* UnpackHelpers.UnpackNonGenericMapTo( unpacker, instance );
*/
unpackToCore =
Expression.Lambda <Action <Unpacker, T, IMessagePackSerializer, IMessagePackSerializer> >(
Expression.Call(
Metadata._UnpackHelpers.UnpackNonGenericMapTo,
unpackerParameter,
Expression.TypeAs(instanceParameter, typeof(IDictionary))
),
unpackerParameter, instanceParameter, keySerializerParameter, valueSerializerParameter
);
}
#if !SILVERLIGHT
if (context.GeneratorOption == SerializationMethodGeneratorOption.CanDump)
{
this._unpackToCoreExpression = unpackToCore;
}
#endif
this._unpackToCore = unpackToCore.Compile();
}