/// <summary>
/// Generates an expression tree to handle class type serialization
/// </summary>
/// <param name="outputStream">Stream to write to</param>
/// <param name="objTracking">Reference tracker</param>
/// <param name="item">Source object</param>
/// <param name="itemAsObj">Source object as an object</param>
/// <param name="typeExpr">Type of the object as an expression</param>
/// <param name="serializer">Serializer temporary variable</param>
/// <param name="itemType">Type of the element</param>
/// <returns>An expression tree to handle class type serialization</returns>
internal static Expression GetWriteClassTypeExpression(ParameterExpression outputStream,
ParameterExpression objTracking,
Expression item,
Expression itemAsObj,
ParameterExpression typeExpr,
ParameterExpression serializer,
Type itemType)
{
var writeType = Expression.IfThenElse(Expression.Equal(Expression.Call(item, ObjectMih.GetTypeMethod()), Expression.Constant(itemType)),
Expression.Block(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value0), objTracking),
Expression.Assign(typeExpr, Expression.Constant(itemType)),
Expression.Assign(itemAsObj, Expression.Convert(item, typeof(object)))),
Expression.Block(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value1), objTracking),
Expression.Assign(itemAsObj, Expression.Call(SerializerMih.PrepareObjectForSerialization(), item)),
Expression.Assign(typeExpr, Expression.Call(itemAsObj, ObjectMih.GetTypeMethod())),
GenerateStringExpression(outputStream, Expression.Call(SerializedTypeResolverMih.GetShortNameFromType(), typeExpr), objTracking),
PrimitiveHelpers.WriteInt32(outputStream, Expression.Call(SerializedTypeResolverMih.GetHashCodeFromType(), typeExpr), objTracking)));
return(Expression.IfThenElse(Expression.Equal(item, Expression.Constant(null)),
PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value0), objTracking),
Expression.Block(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value1), objTracking),
writeType,
Expression.Assign(serializer, Expression.Call(SerializerMih.GetTypeToObjectSerializer(), typeExpr)),
Expression.Invoke(serializer, outputStream, itemAsObj, objTracking))));
}
/// <summary>
/// Generates an expression to handle the 'is that object null' case
/// </summary>
/// <param name="type">Type of <paramref name="objToSerialize"/></param>
/// <param name="outputStream">Stream to write to</param>
/// <param name="objToSerialize">Object to serialize</param>
/// <param name="objTracking">Reference tracker</param>
/// <param name="notTrackedExpressions">Expressions that must be executed if the object is not tracked</param>
/// <param name="variables">Global variables for the expression tree</param>
/// <returns>An expression to handle the 'is that object null' case</returns>
internal static Expression GenerateNullTrackedOrUntrackedExpression(Type type,
ParameterExpression outputStream,
Expression objToSerialize,
ParameterExpression objTracking,
List <Expression> notTrackedExpressions,
List <ParameterExpression> variables)
{
var trackedObjectPosition = Expression.Parameter(typeof(int?), "trackedObjectPosition");
var canBeTracked = Expression.Parameter(typeof(bool), "canBeTracked");
variables.Add(trackedObjectPosition);
variables.Add(canBeTracked);
var alreadyTrackedExpr = Expression.Block(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value0), objTracking),
PrimitiveHelpers.WriteInt32(outputStream, Expression.Convert(trackedObjectPosition, typeof(int)), objTracking));
var isNullExpr = PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value0, typeof(byte)), objTracking);
var isNotNullExpr = Expression.Block(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value1), objTracking),
Expression.IfThenElse(Expression.IsTrue(canBeTracked),
Expression.Assign(trackedObjectPosition, Expression.Call(objTracking, SerializerObjectTrackerMih.GetTrackedObjectIndex(), Expression.Convert(objToSerialize, typeof(object)))),
Expression.Assign(trackedObjectPosition, Expression.Convert(Expression.Constant(null), typeof(int?)))),
Expression.IfThenElse(Expression.NotEqual(trackedObjectPosition, Expression.Constant(null, typeof(int?))),
alreadyTrackedExpr,
Expression.Block(new[] { PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value1), objTracking) }.Concat(notTrackedExpressions))));
List <Expression> expressions = new List <Expression>();
expressions.Add(Expression.Assign(canBeTracked, Expression.Call(objTracking, SerializerObjectTrackerMih.CanBeTracked(), Expression.Constant(type))));
expressions.Add(Expression.IfThenElse(Expression.AndAlso(Expression.IsTrue(canBeTracked), Expression.Equal(Expression.Convert(objToSerialize, typeof(object)), Expression.Constant(null))),
isNullExpr,
isNotNullExpr));
return(Expression.Block(variables, expressions));
}
/// <summary>
/// Generates an expression tree to handle ExpandoObject serialization
/// </summary>
/// <param name="type">Type of <paramref name="objToSerialize"/></param>
/// <param name="variables">Global variables for the expression tree</param>
/// <param name="outputStream">Stream to write to</param>
/// <param name="objToSerialize">Object to serialize</param>
/// <param name="objTracking">Reference tracker</param>
/// <returns>An expression tree to handle ExpandoObject serialization</returns>
public static Expression GenerateExpandoObjectExpression(Type type,
List <ParameterExpression> variables,
ParameterExpression outputStream,
ParameterExpression objToSerialize,
ParameterExpression objTracking)
{
var enumerableType = typeof(IEnumerable <KeyValuePair <string, object> >);
var getEnumeratorMethodInfo = IEnumerableMih.GetEnumerator <string, object>();
var enumeratorMethod = Expression.Call(Expression.Convert(objToSerialize, enumerableType), getEnumeratorMethodInfo);
var loopBodyCargo = new EnumerableLoopBodyCargo();
loopBodyCargo.EnumeratorType = typeof(IEnumerator <KeyValuePair <string, object> >);
loopBodyCargo.KvpType = typeof(KeyValuePair <string, object>);
var preLoopActions = new List <Expression>();
preLoopActions.Add(PrimitiveHelpers.WriteInt32(outputStream, Expression.Property(Expression.Convert(objToSerialize, typeof(ICollection <KeyValuePair <string, object> >)), CollectionMih.Count <KeyValuePair <string, object> >()), objTracking));
var notTrackedExpressions = new List <Expression>();
notTrackedExpressions.Add(Expression.Call(objTracking, SerializerObjectTrackerMih.TrackObject(), objToSerialize));
notTrackedExpressions.Add(EnumerableLoopHelper.GenerateEnumeratorLoop(variables,
EnumerableLoopHelper.GetStringToSomethingWriter(outputStream, objTracking),
enumeratorMethod,
preLoopActions,
loopBodyCargo));
return(Serializer.GenerateNullTrackedOrUntrackedExpression(type,
outputStream,
objToSerialize,
objTracking,
notTrackedExpressions,
variables));
}
internal static Expression SerializeDictionary(Type type,
Type dictionaryType,
List <ParameterExpression> variables,
ParameterExpression outputStream,
ParameterExpression objToSerialize,
ParameterExpression objTracking,
bool addTracking)
{
MethodInfo getEnumeratorMethodInfo = type.GetMethod("GetEnumerator");
var enumeratorMethod = Expression.Call(Expression.Convert(objToSerialize, type), getEnumeratorMethodInfo);
var loopBodyCargo = new EnumerableLoopBodyCargo();
loopBodyCargo.EnumeratorType = getEnumeratorMethodInfo.ReturnType;
loopBodyCargo.KvpType = typeof(KeyValuePair <,>).MakeGenericType(dictionaryType.GetGenericArguments());
var notTrackedExpressions = new List <Expression>();
if (addTracking)
{
notTrackedExpressions.Add(Expression.Call(objTracking, SerializerObjectTrackerMih.TrackObject(), objToSerialize));
notTrackedExpressions.Add(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value1), objTracking));
}
notTrackedExpressions.Add(PrimitiveHelpers.WriteInt32(outputStream, Expression.Property(Expression.Convert(objToSerialize, dictionaryType), "Count"), objTracking));
notTrackedExpressions.Add(EnumerableLoopHelper.GenerateEnumeratorLoop(variables,
GetKeyValuePairLoopBodyCargo(outputStream, objTracking, "Key", dictionaryType.GetGenericArguments()[0], "Value", dictionaryType.GetGenericArguments()[1]),
enumeratorMethod,
null,
loopBodyCargo));
return(Expression.Block(notTrackedExpressions));
}
private static IEnumerable <Expression> WriteDimensionalArrayLength(ParameterExpression outputStream,
Expression objTracking,
Expression i,
ParameterExpression arr,
ParameterExpression lengths,
int rank)
{
var expressions = new List <Expression>();
expressions.Add(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant((byte)rank), objTracking));
var loopExpressions = new List <Expression>();
expressions.Add(Expression.Assign(i, Expression.Constant(0)));
var length = Expression.Call(arr, ArrayMih.GetLength(), i);
loopExpressions.Add(Expression.Assign(Expression.ArrayAccess(lengths, i), length));
loopExpressions.Add(PrimitiveHelpers.WriteInt32(outputStream, Expression.ArrayIndex(lengths, i), objTracking));
loopExpressions.Add(Expression.Assign(i, Expression.Add(i, Expression.Constant(1))));
var loopBody = Expression.Block(loopExpressions);
var breakLabel = Expression.Label("breakLabel");
var cond = Expression.LessThan(i, Expression.Constant(rank));
var loop = Expression.Loop(Expression.IfThenElse(cond,
loopBody,
Expression.Break(breakLabel)),
breakLabel);
expressions.Add(loop);
return(expressions);
}
private static Expression SerializeISerializable(Type type,
List <ParameterExpression> variables,
ParameterExpression outputStream,
ParameterExpression objToSerialize,
ParameterExpression objTracking)
{
var fc = Expression.Parameter(typeof(FormatterConverter), "fc");
var context = Expression.Parameter(typeof(StreamingContext), "context");
var si = Expression.Parameter(typeof(SerializationInfo), "si");
var iser = Expression.Parameter(typeof(ISerializable), "iser");
variables.Add(fc);
variables.Add(context);
variables.Add(si);
variables.Add(iser);
var getEnumeratorMethodInfo = SerializationInfoMih.GetEnumerator();
var enumeratorMethod = Expression.Call(si, getEnumeratorMethodInfo);
var loopBodyCargo = new EnumerableLoopBodyCargo();
loopBodyCargo.EnumeratorType = typeof(SerializationInfoEnumerator);
loopBodyCargo.KvpType = typeof(SerializationEntry);
var preLoopActions = new List <Expression>();
preLoopActions.Add(PrimitiveHelpers.WriteInt32(outputStream, Expression.Property(si, SerializationInfoMih.MemberCount()), objTracking));
var notTrackedExpressions = new List <Expression>();
notTrackedExpressions.Add(PrimitiveHelpers.WriteByte(outputStream, Expression.Constant(SerializerObjectTracker.Value0, typeof(byte)), objTracking));
notTrackedExpressions.Add(Expression.Assign(fc, Expression.New(typeof(FormatterConverter))));
notTrackedExpressions.Add(Expression.Assign(context, Expression.New(StreamingContextMih.Constructor(), Expression.Constant(StreamingContextStates.All))));
notTrackedExpressions.Add(Expression.Assign(si, Expression.New(SerializationInfoMih.Constructor(), Expression.Constant(type), fc)));
notTrackedExpressions.Add(Expression.Assign(iser, Expression.Convert(objToSerialize, typeof(ISerializable))));
notTrackedExpressions.AddRange(SerializationCallbacksHelper.GenerateOnSerializingAttributeExpression(type, objToSerialize, context));
notTrackedExpressions.Add(Expression.Call(iser, ISerializableMih.GetObjectData(), si, context));
notTrackedExpressions.AddRange(SerializationCallbacksHelper.GenerateOnSerializedAttributeExpression(type, objToSerialize, context));
notTrackedExpressions.Add(Expression.IfThen(Expression.IsTrue(Expression.Property(si, "IsFullTypeNameSetExplicit")),
Expression.Throw(Expression.New(InvalidOperationExceptionMih.Constructor(), Expression.Constant("Changing the full type name for an ISerializable is not supported")))));
notTrackedExpressions.Add(Expression.IfThen(Expression.IsTrue(Expression.Property(si, "IsAssemblyNameSetExplicit")),
Expression.Throw(Expression.New(InvalidOperationExceptionMih.Constructor(), Expression.Constant("Changing the assembly name for an ISerializable is not supported")))));
notTrackedExpressions.Add(EnumerableLoopHelper.GenerateEnumeratorLoop(variables,
DictionarySerializer.GetKeyValuePairLoopBodyCargo(outputStream, objTracking, "Name", typeof(string), "Value", typeof(object)),
enumeratorMethod,
preLoopActions,
loopBodyCargo));
notTrackedExpressions.Add(Expression.Call(objTracking, SerializerObjectTrackerMih.TrackObject(), objToSerialize));
return(Expression.Block(notTrackedExpressions));
}
private static IEnumerable <Expression> WriteJaggedArray(Type elementType,
List <ParameterExpression> variables,
ParameterExpression outputStream,
ParameterExpression arr,
ParameterExpression objTracking)
{
var item = Expression.Parameter(elementType, "item");
var serializer = Expression.Parameter(typeof(Action <Stream, object, SerializerObjectTracker>), "serializer");
var itemAsObj = Expression.Parameter(typeof(object), "itemAsObj");
var typeExpr = Expression.Parameter(typeof(Type), "typeExpr");
var i = Expression.Parameter(typeof(int), "i");
var length = Expression.Parameter(typeof(int), "length");
variables.Add(typeExpr);
variables.Add(itemAsObj);
variables.Add(serializer);
variables.Add(item);
variables.Add(length);
variables.Add(i);
var expressions = new List <Expression>();
expressions.Add(Expression.Assign(length, Expression.Property(arr, "Length")));
expressions.Add(PrimitiveHelpers.WriteInt32(outputStream, length, objTracking));
expressions.Add(Expression.Assign(i, Expression.Constant(0)));
Debug.Assert(!elementType.IsPrimitive && !elementType.IsValueType && elementType != typeof(string), "Type cannot be a primitive");
var loopExpressions = new List <Expression>();
loopExpressions.Add(Expression.Assign(item, Expression.ArrayAccess(arr, i))); // uh?
loopExpressions.Add(Expression.Assign(item, Expression.Convert(Expression.Call(arr, ArrayMih.GetValue(), i), elementType)));
loopExpressions.Add(Serializer.GetWriteClassTypeExpression(outputStream, objTracking, item, itemAsObj, typeExpr, serializer, elementType));
loopExpressions.Add(Expression.Assign(i, Expression.Add(i, Expression.Constant(1))));
var cond = Expression.LessThan(i, length);
var loopBody = Expression.Block(loopExpressions);
var breakLabel = Expression.Label("breakLabel");
var loop = Expression.Loop(Expression.IfThenElse(cond,
loopBody,
Expression.Break(breakLabel)),
breakLabel);
expressions.Add(loop);
return(expressions);
}