public object ReadValue(IStreamReader reader, ISerializeContext context, bool isReadTypeIdExpected)
{
context.Key = this.Name;
context.ArrayIndex = null;
if (isReadTypeIdExpected)
{
// read type of property
uint actualTypeId = reader.ReadUInt32();
if (TypeId != actualTypeId)
{
if (actualTypeId == (int)ItemType.ComplexObject)
{
// Special read > only null expected
byte contentObjType = reader.ReadUInt8();
if (contentObjType == ValueItem.NullValueIdent)
{
return(null);
}
else
{
throw new ArgumentException("ComplexObject type ID is only expected with null!");
}
}
var actualStructure = context.GetByTypeId(actualTypeId);
if (actualStructure == null)
{
// type not in local cache > type meta info exptected
actualStructure = TypeMetaStructure.ReadContentTypeMetaInfo(reader, actualTypeId, context);
}
if (actualStructure.IsTypePrefixExpected)
{
if (actualStructure is ITypePrefix)
{
// type id already consumed > do not read again
return(((ITypePrefix)actualStructure).ReadValue(reader, context, false));
}
else
{
return(actualStructure.ReadValue(reader, context));
}
}
else
{
// read content type because of unknown strucutre
byte contentObjType = reader.ReadUInt8();
if (contentObjType == ValueItem.NullValueIdent)
{
return(null);
}
else
{
return(actualStructure.ReadValue(reader, context));
}
}
}
}
byte contentType = reader.ReadUInt8();
if (contentType == ValueItem.TypeMetaInfo)
{
// type meta data already loaded for type id > skip data
TypeMetaStructure.SkipTypeMetaInfo(reader);
contentType = reader.ReadUInt8();
}
switch (contentType)
{
case ValueItem.SingleObjectIdent:
object newObject = TypeService.CreateInstance(concreteTargetType);
object oldParentObj = context.ParentObject;
context.ParentObject = newObject;
for (int itemIndex = 0; itemIndex < items.Count; itemIndex++)
{
var item = items[itemIndex];
var itemValue = item.ReadValue(reader, context);
item.SetItemValue(newObject, itemValue);
}
context.ParentObject = oldParentObj;
return(newObject);
case ValueItem.NullValueIdent:
return(null);
case ValueItem.CollectionObjectIdent:
throw new NotImplementedException();
default:
throw new InvalidOperationException($"Type ident {contentType} not expected!");
}
}
public object ReadValue(IStreamReader reader, ISerializeContext context)
{
byte contentType = reader.ReadUInt8();
context.Key = this.Name;
if (contentType == ValueItem.CollectionObjectIdent)
{
int count = reader.ReadInt32();
if (isArray)
{
Array array = Array.CreateInstance(itemType, count);
if (isByteArray)
{
return(reader.ReadBytes(count).ToArray());
}
else
{
for (int i = 0; i < count; i++)
{
context.ArrayIndex = i;
var item = itemStructure.ReadValue(reader, context);
array.SetValue(item, i);
}
context.ArrayIndex = null;
}
return(array);
}
else if (implementsIList)
{
IList coll = (IList)TypeService.CreateInstance(targetCollectionType);
for (int i = 0; i < count; i++)
{
context.ArrayIndex = i;
var item = itemStructure.ReadValue(reader, context);
coll.Add(item);
}
context.ArrayIndex = null;
return(coll);
}
else
{
object specialColl = TypeService.CreateInstance(targetCollectionType);
for (int i = 0; i < count; i++)
{
context.ArrayIndex = i;
var item = itemStructure.ReadValue(reader, context);
specialCollAddMethod.Invoke(specialColl, new object[] { item });
}
context.ArrayIndex = null;
return(specialColl);
}
}
else if (contentType == ValueItem.NullValueIdent)
{
return(null);
}
else if (contentType == ValueItem.TypeMetaInfo)
{
TypeMetaStructure.SkipTypeMetaInfo(reader);
return(this.ReadValue(reader, context));
}
else
{
throw new InvalidOperationException($"Type ident {contentType} not expected!");
}
}
public void WriteValue(IStreamWriter writer, ISerializeContext context, object value)
{
// Complex structure
// TypeID UInt32
// ContentType Byte
context.Key = this.Name;
if (isObject)
{
// property or collection does not specify a target type
// determine object type
if (value != null)
{
Type valType = value.GetType();
IValueItem item;
var differentTargetStructure = context.DetermineSpecialInterfaceType(value.GetType(), type);
if (differentTargetStructure != null)
{
item = differentTargetStructure;
}
else
{
item = context.GetByType(valType);
}
if (!item.IsTypePrefixExpected)
{
// Write type id for value types as well (unknown structure)
writer.WriteUInt32(item.TypeId);
writer.WriteUInt8(ValueItem.SingleValueIdent);
}
item.WriteValue(writer, context, value);
}
else
{
// write complex object type id for null value
writer.WriteInt32((int)ItemType.ComplexObject);
writer.WriteUInt8(ValueItem.NullValueIdent);
}
}
else if (value == null)
{
// Write null
writer.WriteUInt32(this.TypeId);
writer.WriteUInt8(ValueItem.NullValueIdent);
}
else
{
IValueItem differentTargetStructure = null;
if (CheckDifferentType)
{
differentTargetStructure = context.DetermineSpecialInterfaceType(value.GetType(), type);
}
if (differentTargetStructure != null)
{
// Special target interface type serialization
differentTargetStructure.WriteValue(writer, context, value);
}
else
{
// Just write type properties
writer.WriteUInt32(this.TypeId);
if (context.IsWriteTypeMetaInfoRequired(this.TypeId))
{
// serialize type meta info at the first time
TypeMetaStructure.WriteTypeMetaInfo(writer, this);
}
writer.WriteUInt8(ValueItem.SingleObjectIdent);
object oldParentObj = context.ParentObject;
context.ParentObject = value;
for (int itemIndex = 0; itemIndex < items.Count; itemIndex++)
{
var item = items[itemIndex];
var valueItem = item.GetItemValue(value);
item.WriteValue(writer, context, valueItem);
}
context.ParentObject = oldParentObj;
}
}
}
public void WriteValue(IStreamWriter writer, ISerializeContext context, object value)
{
// Collection structure:
// TypeID UInt32
// ContentType Byte
// Count Int32
// Items...
if (getter == null)
{
writer.WriteUInt32(this.TypeId); // only write collection type if element is root object
if (context.IsWriteTypeMetaInfoRequired(this.TypeId))
{
// serialize type meta info at the first time
TypeMetaStructure.WriteTypeMetaInfo(writer, this);
}
}
if (value == null)
{
writer.WriteUInt8(ValueItem.NullValueIdent);
}
else
{
writer.WriteUInt8(ValueItem.CollectionObjectIdent);
IEnumerable items;
if (isArray)
{
Array array = (Array)value;
writer.WriteInt32(array.Length);
items = array;
if (isByteArray)
{
writer.WriteBytes(new ArraySegment <byte>((byte[])array));
return;
}
}
else if (value is ICollection)
{
ICollection collection = (ICollection)value;
writer.WriteInt32(collection.Count);
items = collection;
}
else
{
items = (IEnumerable)value;
int count = 0;
foreach (var item in items)
{
count++;
}
writer.WriteInt32(count);
}
context.Key = this.Name;
int index = 0;
foreach (var item in items)
{
context.ArrayIndex = index;
itemStructure.WriteValue(writer, context, item);
index++;
}
context.ArrayIndex = null;
}
}
