private void SkipPadding(BoundedStream stream)
{
var length = GetFieldLength();
if (length != null)
{
if (length > stream.RelativePosition)
{
var padLength = length - stream.RelativePosition;
var pad = new byte[(int)padLength.TotalByteCount];
stream.Read(pad, padLength);
}
}
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
if (EndOfStream(stream))
{
if (TypeNode.IsNullable)
{
return;
}
throw new EndOfStreamException();
}
Deserialize(stream, TypeNode.GetSerializedType());
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var terminationValue = GetTerminationValue();
var terminationChild = GetTerminationChild();
var itemTerminationValue = GetItemTerminationValue();
var itemLengths = GetItemLengths();
using var itemLengthEnumerator = itemLengths?.GetEnumerator();
var count = GetFieldCount() ?? long.MaxValue;
for (long i = 0; i < count && !EndOfStream(stream); i++)
{
if (IsTerminated(stream, terminationChild, terminationValue, eventShuttle))
{
break;
}
itemLengthEnumerator?.MoveNext();
// TODO this doesn't allow for deferred eval of endianness in the case of jagged arrays
// probably extremely rare but still...
var itemLength = itemLengthEnumerator?.Current;
var childStream = itemLength == null
? new BoundedStream(stream, Name)
: new BoundedStream(stream, Name, () => itemLength);
var child = CreateChildSerializer();
using (var streamResetter = new StreamResetter(childStream))
{
child.Deserialize(childStream, eventShuttle);
if (child.Value == null)
{
break;
}
if (IsTerminated(child, itemTerminationValue))
{
ProcessLastItem(streamResetter, child);
break;
}
streamResetter.CancelReset();
}
Children.Add(child);
}
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var items = DeserializeCollection(stream, eventShuttle).ToList();
var itemCount = items.Count;
/* Create final collection */
Value = CreateCollection(itemCount);
/* Copy temp list into final collection */
for (var i = 0; i < itemCount; i++)
{
SetCollectionValue(items[i], i);
}
}
protected static bool IsTerminated(BoundedStream stream, ValueNode terminationChild, object terminationValue,
EventShuttle eventShuttle)
{
if (terminationChild != null)
{
using var streamResetter = new StreamResetter(stream);
terminationChild.Deserialize(stream, eventShuttle);
if (terminationChild.Value.Equals(terminationValue))
{
streamResetter.CancelReset();
return(true);
}
}
return(false);
}
private Task SkipPaddingAsync(BoundedStream stream, CancellationToken cancellationToken)
{
var length = GetFieldLength();
if (length != null)
{
if (length > stream.RelativePosition)
{
var padLength = length - stream.RelativePosition;
var pad = new byte[(int)padLength.TotalByteCount];
return(stream.ReadAsync(pad, padLength, cancellationToken));
}
}
return(Task.CompletedTask);
}
internal override void SerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var valueStream = (Stream)Value;
var length = GetConstFieldLength();
if (length != null)
{
var valueStreamlet = new Streamlet(valueStream, valueStream.Position, length.ByteCount);
valueStreamlet.CopyTo(stream);
}
else
{
valueStream.CopyTo(stream);
}
}
internal override async Task SerializeOverrideAsync(BoundedStream stream, EventShuttle eventShuttle, CancellationToken cancellationToken)
{
var valueStream = (Stream)Value;
var length = GetConstFieldLength();
if (length != null)
{
var valueStreamlet = new Streamlet(valueStream, valueStream.Position, length.ByteCount);
await valueStreamlet.CopyToAsync(stream, CopyToBufferSize, cancellationToken).ConfigureAwait(false);
}
else
{
await valueStream.CopyToAsync(stream, CopyToBufferSize, cancellationToken).ConfigureAwait(false);
}
}
protected virtual void ObjectSerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
// check to see if we are actually supposed to be a custom serialization. This is a side-effect of
// treating all object members as object nodes. In the case of sub-types we could later discover we
// are actually a custom node because the specified subtype implements IBinarySerializable.
var parent = (TypeNode)TypeNode.Parent;
if (_valueType != null && (TypeNode.SubtypeBinding != null || parent.ItemSubtypeBinding != null))
{
var typeNode = (ObjectTypeNode)TypeNode;
var subType = typeNode.GetSubTypeNode(_valueType);
if (subType is CustomTypeNode)
{
var customValueNode = subType.CreateSerializer((ValueNode)Parent);
// this is a little bit of a cheat, but another side-effect of this weird corner case
customValueNode.Value = _cachedValue;
customValueNode.SerializeOverride(stream, eventShuttle);
return;
}
}
var serializableChildren = GetSerializableChildren();
var lazyContext = CreateLazySerializationContext();
foreach (var child in serializableChildren)
{
// report on serialization start if subscribed
if (eventShuttle != null && eventShuttle.HasSerializationSubscribers)
{
eventShuttle.OnMemberSerializing(this, child.Name, lazyContext,
stream.GlobalPosition);
}
// serialize child
child.Serialize(stream, eventShuttle);
// report on serialization complete if subscribed
if (eventShuttle != null && eventShuttle.HasSerializationSubscribers)
{
eventShuttle.OnMemberSerialized(this, child.Name, child.BoundValue, lazyContext,
stream.GlobalPosition);
}
}
}
private static void Seek(BoundedStream BoundedStream)
{
while (true)
{
var Byte = BoundedStream.ReadByte();
switch (Byte)
{
case 0b00000000:
return;
case 0b11000000:
BoundedStream.ReadByte();
return;
}
}
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var typeNode = (EnumTypeNode)TypeNode;
var enumInfo = typeNode.EnumInfo;
Deserialize(stream, enumInfo.SerializedType, enumInfo.EnumValueLength);
var value = GetValue(enumInfo.SerializedType);
if (enumInfo.ValueEnums != null)
{
value = enumInfo.ValueEnums[(string)value];
}
var underlyingValue = value.ConvertTo(enumInfo.UnderlyingType);
Value = Enum.ToObject(TypeNode.BaseSerializedType, underlyingValue);
}
internal override void SerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
ObjectSerializeOverride(stream, eventShuttle);
var length = GetConstFieldLength();
/* Check if we need to pad out object */
if (length != null)
{
if (length > stream.RelativePosition)
{
var padLength = length - stream.RelativePosition;
var pad = new byte[(int)padLength];
stream.Write(pad, 0, pad.Length);
}
}
}
protected override void ObjectSerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var serializationContext = CreateLazySerializationContext();
var value = BoundValue;
if (value == null)
{
return;
}
if (!(value is IBinarySerializable binarySerializable))
{
throw new InvalidOperationException("Must implement IBinarySerializable");
}
binarySerializable.Serialize(stream, GetFieldEndianness(), serializationContext);
}
internal override void SerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
long?itemLength = GetConstFieldItemLength();
var count = GetConstFieldCount();
PrimitiveCollectionSerializeOverride(stream, itemLength, count);
var typeNode = (CollectionTypeNode)TypeNode;
/* Add termination */
if (typeNode.TerminationChild != null)
{
var terminationChild = typeNode.TerminationChild.CreateSerializer(this);
terminationChild.Value = typeNode.TerminationValue;
terminationChild.Serialize(stream, eventShuttle);
}
}
protected override void PrimitiveCollectionSerializeOverride(BoundedStream stream, object boundValue,
ValueValueNode childSerializer, SerializedType childSerializedType, FieldLength itemLength, long?itemCount)
{
var list = (IList)boundValue;
// Handle const-sized mismatched collections
PadList(ref list, itemCount);
foreach (var value in list)
{
if (stream.IsAtLimit)
{
break;
}
childSerializer.Serialize(stream, value, childSerializedType, itemLength);
}
}
internal override void SerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var serializableChildren = GetSerializableChildren().ToList();
var typeNode = (CollectionTypeNode)TypeNode;
if (typeNode.ItemSerializeUntilAttribute != null &&
typeNode.ItemSerializeUntilAttribute.LastItemMode == LastItemMode.Include)
{
var lastChild = serializableChildren.LastOrDefault();
if (lastChild != null)
{
var itemTerminationValue = TypeNode.ItemSerializeUntilBinding.GetBoundValue(this);
var itemTerminationChild = lastChild.GetChild(typeNode.ItemSerializeUntilAttribute.ItemValuePath);
var convertedItemTerminationValue =
itemTerminationValue.ConvertTo(itemTerminationChild.TypeNode.Type);
itemTerminationChild.Value = convertedItemTerminationValue;
}
}
foreach (var child in serializableChildren)
{
if (stream.IsAtLimit)
{
break;
}
var childStream = GetConstFieldItemLength() == null
? stream
: new BoundedStream(stream, GetConstFieldItemLength);
child.Serialize(childStream, eventShuttle);
}
if (typeNode.TerminationChild != null)
{
var terminationChild = typeNode.TerminationChild.CreateSerializer(this);
terminationChild.Value = typeNode.TerminationValue;
terminationChild.Serialize(stream, eventShuttle);
}
}
protected override void PrimitiveCollectionSerializeOverride(BoundedStream stream, object boundValue,
ValueValueNode childSerializer, SerializedType childSerializedType, FieldLength itemLength, long?itemCount)
{
var array = (Array)BoundValue;
// Handle const-sized mismatched collections
PadArray(ref array, itemCount);
for (var i = 0; i < array.Length; i++)
{
if (stream.IsAtLimit)
{
break;
}
var value = array.GetValue(i);
childSerializer.Serialize(stream, value, childSerializedType, itemLength);
}
}
protected override async Task PrimitiveCollectionSerializeOverrideAsync(BoundedStream stream, object boundValue, ValueValueNode childSerializer,
SerializedType childSerializedType, FieldLength itemLength, long?itemCount, CancellationToken cancellationToken)
{
var list = (IList)boundValue;
// Handle const-sized mismatched collections
PadList(ref list, itemCount);
foreach (var value in list)
{
if (stream.IsAtLimit)
{
break;
}
await childSerializer.SerializeAsync(stream, value, childSerializedType, itemLength, cancellationToken)
.ConfigureAwait(false);
}
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var rootStream = GetRootStream(stream);
var length = GetFieldLength();
Value = length != null
? new Streamlet(rootStream, rootStream.Position, length.Value)
: new Streamlet(rootStream, rootStream.Position);
if (length != null)
{
stream.Seek(length.Value, SeekOrigin.Current);
}
else
{
stream.Seek(0, SeekOrigin.End);
}
}
private IEnumerable <object> DeserializeCollection(BoundedStream stream, EventShuttle eventShuttle)
{
var typeNode = (CollectionTypeNode)TypeNode;
/* Create single serializer to do all the work */
var childSerializer = (ValueValueNode)typeNode.Child.CreateSerializer(this);
var reader = new BinaryReader(stream);
var childSerializedType = childSerializer.TypeNode.GetSerializedType();
var count = GetFieldCount() ?? long.MaxValue;
long?itemLength = GetFieldItemLength();
var terminationValue = typeNode.TerminationValue;
var terminationChild = typeNode.TerminationChild?.CreateSerializer(this);
for (long i = 0; i < count; i++)
{
if (EndOfStream(stream))
{
break;
}
/* Check termination case */
if (terminationChild != null)
{
using (var streamResetter = new StreamResetter(stream))
{
terminationChild.Deserialize(stream, eventShuttle);
if (terminationChild.Value.Equals(terminationValue))
{
streamResetter.CancelReset();
break;
}
}
}
childSerializer.Deserialize(reader, childSerializedType, itemLength);
yield return(childSerializer.GetValue(childSerializedType));
}
}
internal override async Task SerializeOverrideAsync(BoundedStream stream, EventShuttle eventShuttle, CancellationToken cancellationToken)
{
var serializableChildren = GetSerializableChildren().ToList();
SetTerminationValue(serializableChildren);
foreach (var child in serializableChildren)
{
if (stream.IsAtLimit)
{
break;
}
var childStream = new BoundedStream(stream, GetConstFieldItemLength);
await child.SerializeAsync(childStream, eventShuttle, true, cancellationToken).ConfigureAwait(false);
}
await SerializeTerminationAsync(stream, eventShuttle, cancellationToken);
}
internal override void SerializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var serializableChildren = GetSerializableChildren().ToList();
SetTerminationValue(serializableChildren);
foreach (var child in serializableChildren)
{
if (stream.IsAtLimit)
{
break;
}
var childStream = new BoundedStream(stream, GetConstFieldItemLength);
child.Serialize(childStream, eventShuttle);
}
SerializeTermination(stream, eventShuttle);
}
protected override async Task PrimitiveCollectionSerializeOverrideAsync(BoundedStream stream, object boundValue, ValueValueNode childSerializer,
SerializedType childSerializedType, FieldLength itemLength, long?itemCount, CancellationToken cancellationToken)
{
var array = (Array)BoundValue;
// Handle const-sized mismatched collections
PadArray(ref array, itemCount);
for (var i = 0; i < array.Length; i++)
{
if (stream.IsAtLimit)
{
break;
}
var value = array.GetValue(i);
await childSerializer.SerializeAsync(stream, value, childSerializedType, itemLength, cancellationToken)
.ConfigureAwait(false);
}
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
var rootStream = GetRootStream(stream);
var length = GetFieldLength();
Value = length != null
? new Streamlet(rootStream, rootStream.Position, length.ByteCount)
: new Streamlet(rootStream, rootStream.Position);
if (length != null)
{
var nullStream = new NullStream();
stream.CopyTo(nullStream, (int)length.ByteCount, CopyToBufferSize);
}
else
{
stream.Seek(0, SeekOrigin.End);
}
}
public void TestRead()
{
using (MemoryStream baseStream = new MemoryStream(_buff)) {
using (BoundedStream boundedStream = new BoundedStream(baseStream, 10, 100)) {
Assert.AreEqual((boundedStream.Position + boundedStream.LowerBound) % 256, boundedStream.ReadByte() % 256);
Assert.AreEqual((boundedStream.Position + boundedStream.LowerBound) % 256, boundedStream.ReadByte() % 256);
// Partial reads to upper bound
boundedStream.Seek(1, SeekOrigin.End);
byte[] buff = new byte[2] {
0, 200
};
byte[] expectedBuff = new byte[2] {
99, 200
};
boundedStream.Read(buff, 0, buff.Length);
CollectionAssert.AreEqual(expectedBuff, buff);
}
}
}
internal BoundedStream(Stream source, string name, Func <FieldLength> maxLengthDelegate = null)
{
Source = source ?? throw new ArgumentNullException(nameof(source));
_name = name;
_maxLengthDelegate = maxLengthDelegate;
/* Store for performance */
_canSeek = source.CanSeek;
if (_canSeek)
{
_length = source.Length;
}
_root = this;
while (_root.Source is BoundedStream root)
{
_root = root;
}
}
private void SaveToStream(SaveMode saveMode, Stream destination, Stream serverCopy)
{
XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
xmlWriterSettings.CloseOutput = false;
if (saveMode != SaveMode.NoConflictResolution && serverCopy.Length != 0L)
{
try
{
using (Stream stream = new BoundedStream(serverCopy, false, 0L, 524288L))
{
using (StreamReader streamReader = new StreamReader(stream, true))
{
using (XmlReader xmlReader = XmlReader.Create(streamReader))
{
xmlWriterSettings.Encoding = (streamReader.CurrentEncoding ?? Encoding.UTF8);
using (XmlWriter xmlTextWriter = Util.GetXmlTextWriter(destination, xmlWriterSettings))
{
new MasterCategoryListSerializer(xmlReader).SerializeUsingSource(this, xmlTextWriter);
return;
}
}
}
}
}
catch (CorruptDataException inner)
{
if (saveMode == SaveMode.FailOnAnyConflict)
{
throw new SaveConflictException(ServerStrings.ExMclCannotBeResolved, inner);
}
}
}
destination.Position = 0L;
destination.SetLength(0L);
using (XmlWriter xmlWriter = XmlWriter.Create(destination, xmlWriterSettings))
{
MasterCategoryListSerializer.Serialize(this, xmlWriter);
}
}
private static MemoryStream GetRootStream(BoundedStream BoundedStream)
{
var Root = BoundedStream.Source;
while (true)
{
switch (Root)
{
case BoundedStream Bounded:
{
Root = Bounded.Source;
continue;
}
case MemoryStream Memory:
{
return(Memory);
}
}
}
}
internal override async Task DeserializeOverrideAsync(BoundedStream stream, EventShuttle eventShuttle,
CancellationToken cancellationToken)
{
var rootStream = GetRootStream(stream);
var length = GetFieldLength();
Value = length != null
? new Streamlet(rootStream, rootStream.Position, length.ByteCount)
: new Streamlet(rootStream, rootStream.Position);
if (length != null)
{
var nullStream = new NullStream();
await stream.CopyToAsync(nullStream, (int)length.ByteCount, CopyToBufferSize, cancellationToken)
.ConfigureAwait(false);
}
else
{
stream.Seek(0, SeekOrigin.End);
}
}
internal override void DeserializeOverride(BoundedStream stream, EventShuttle eventShuttle)
{
ResolveValueType();
// skip over if null (this may happen if subtypes are unknown during deserialization)
if (_valueType != null)
{
GenerateChildren();
ThrowIfUnordered();
try
{
ObjectDeserializeOverride(stream, eventShuttle);
}
catch (EndOfStreamException)
{
// this is ok but we can't consider this object fully formed.
_valueType = null;
}
}
SkipPadding(stream);
}
