private Action <object> CreateReader(PropertyInfo column, Dictionary <Type, Func <BinaryReader, object> > customReaders)
{
if (customReaders.ContainsKey(column.PropertyType))
{
var reader = customReaders[column.PropertyType];
return(o => column.SetValue(o, reader(_columnReader)));
}
var paramObject = Expression.Parameter(typeof(object), "o");
var typedObject = Expression.Convert(paramObject, column.DeclaringType);
if (column.PropertyType == typeof(bool))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean()));
}
if (column.PropertyType == typeof(bool?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadBoolean() : (bool?)null));
}
if (column.PropertyType == typeof(byte))
{
return(o => column.SetValue(o, _columnReader.ReadByte()));
}
if (column.PropertyType == typeof(byte?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadByte() : (byte?)null));
}
if (column.PropertyType == typeof(sbyte))
{
return(o => column.SetValue(o, _columnReader.ReadSByte()));
}
if (column.PropertyType == typeof(sbyte?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadSByte() : (sbyte?)null));
}
if (column.PropertyType == typeof(short))
{
return(o => column.SetValue(o, _columnReader.ReadInt16()));
}
if (column.PropertyType == typeof(short?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadInt16() : (short?)null));
}
if (column.PropertyType == typeof(ushort))
{
return(o => column.SetValue(o, _columnReader.ReadUInt16()));
}
if (column.PropertyType == typeof(ushort?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadUInt16() : (ushort?)null));
}
if (column.PropertyType == typeof(int))
{
return(o => column.SetValue(o, _columnReader.ReadInt32()));
}
if (column.PropertyType == typeof(int?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadInt32() : (int?)null));
}
if (column.PropertyType == typeof(uint))
{
return(o => column.SetValue(o, _columnReader.ReadUInt32()));
}
if (column.PropertyType == typeof(uint?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadUInt32() : (uint?)null));
}
if (column.PropertyType == typeof(long))
{
return(o => column.SetValue(o, _columnReader.ReadInt64()));
}
if (column.PropertyType == typeof(long?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadInt64() : (long?)null));
}
if (column.PropertyType == typeof(ulong))
{
return(o => column.SetValue(o, _columnReader.ReadUInt64()));
}
if (column.PropertyType == typeof(ulong?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadUInt64() : (ulong?)null));
}
if (column.PropertyType == typeof(Guid))
{
return(o => column.SetValue(o, new Guid(_columnReader.ReadBytes(16))));
}
if (column.PropertyType == typeof(Guid?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? new Guid(_columnReader.ReadBytes(16)) : (Guid?)null));
}
if (column.PropertyType == typeof(decimal))
{
var reader = new DecimalReader(_columnStream);
var paramValue = Expression.Parameter(typeof(decimal), "d");
var call = Expression.Call(typedObject, column.GetSetMethod(), paramValue);
var setter = Expression.Lambda <Action <object, decimal> >(call, paramObject, paramValue).Compile();
return(o => setter(o, reader.ReadDecimal()));
}
if (column.PropertyType == typeof(decimal?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? _columnReader.ReadDecimal() : (decimal?)null));
}
if (column.PropertyType == typeof(DateTime))
{
return(o => column.SetValue(o, new DateTime(_columnReader.ReadInt64())));
}
if (column.PropertyType == typeof(DateTime?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? new DateTime(_columnReader.ReadInt64()) : (DateTime?)null));
}
if (column.PropertyType == typeof(DateTimeOffset))
{
return(o => column.SetValue(o, new DateTimeOffset(_columnReader.ReadInt64(), new TimeSpan(_columnReader.ReadInt64()))));
}
if (column.PropertyType == typeof(DateTimeOffset?))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? new DateTimeOffset(_columnReader.ReadInt64(), new TimeSpan(_columnReader.ReadInt64())) : (DateTimeOffset?)null));
}
if (column.PropertyType == typeof(string))
{
return(o => column.SetValue(o, _columnReader.ReadString()));
}
if (column.PropertyType.IsEnum)
{
var underlyingType = Enum.GetUnderlyingType(column.PropertyType);
if (underlyingType == typeof(byte))
{
return(o => column.SetValue(o, _columnReader.ReadByte()));
}
if (underlyingType == typeof(short))
{
return(o => column.SetValue(o, _columnReader.ReadInt16()));
}
if (underlyingType == typeof(int))
{
return(o => column.SetValue(o, _columnReader.ReadInt32()));
}
throw new NotSupportedException("Unsupported underlying enum type: " + underlyingType.FullName);
}
if (Nullable.GetUnderlyingType(column.PropertyType)?.IsEnum == true)
{
var underlyingType = Enum.GetUnderlyingType(Nullable.GetUnderlyingType(column.PropertyType));
if (underlyingType == typeof(byte))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? (object)_columnReader.ReadByte() : null));
}
if (underlyingType == typeof(short))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? (object)_columnReader.ReadInt16() : null));
}
if (underlyingType == typeof(int))
{
return(o => column.SetValue(o, _columnReader.ReadBoolean() ? (object)_columnReader.ReadInt32() : null));
}
throw new NotSupportedException("Unsupported underlying enum type: " + underlyingType.FullName);
}
if (column.PropertyType.IsArray)
{
var reader = new TypeReader(_path + column.Name + ".", column.PropertyType.GetElementType(), customReaders);
return(o =>
{
var isNonNull = _columnReader.ReadBoolean();
if (!isNonNull)
{
column.SetValue(o, null);
}
else
{
var length = _columnReader.ReadUInt16();
var array = (Array)Activator.CreateInstance(column.PropertyType, length);
for (int i = 0; i < length; i++)
{
array.SetValue(reader.ReadNew(), i);
}
column.SetValue(o, array);
}
});
}
if (!column.PropertyType.IsValueType)
{
var reader = new TypeReader(_path + column.Name + ".", column.PropertyType, customReaders);
return(o =>
{
var isNonNull = _columnReader.ReadBoolean();
column.SetValue(o, isNonNull ? reader.ReadNew() : null);
});
}
throw new Exception("Unsupported column type " + column.PropertyType.Name);
}
internal void Dispatch(Dictionary <Type, Type> knownProxies, Dictionary <Type, Action <object> > handlers)
{
// TODO: Maybe we should create a new reader each time?
_recordsStream.Seek(0, SeekOrigin.Begin);
var readerStream = new UInt16Reader(_recordsStream);
// TODO: Maybe we should share column readers?
var typesMap = new Type[ushort.MaxValue];
var typeReaders = new TypeReader[ushort.MaxValue];
foreach (var type in handlers.Keys)
{
var originalType = type;
if (knownProxies.ContainsKey(type))
{
originalType = knownProxies[type];
}
if (_typeIdsMap.ContainsKey(originalType.FullName))
{
var typeId = _typeIdsMap[originalType.FullName];
var path = _folder + "\\" + originalType.FullName + "\\";
typesMap[typeId] = type;
typeReaders[typeId] = new TypeReader(path, type, _customReaders)
{
Handler = handlers[type]
};
}
}
// Keep reading while there's more data
ushort[] records = null;
while ((records = readerStream.ReadUInt16s()).Length != 0)
{
// Read as many values as we can from the reader's buffer
for (var i = 0; i < records.Length; i++)
{
var typeId = records[i];
var typeReader = typeReaders[typeId];
if (typeReader == null)
{
continue;
}
var handler = typeReader.Handler;
var instance = typeReader.Read();
handler(instance);
}
}
foreach (var type in typeReaders)
{
if (type == null)
{
continue;
}
type.Dispose();
}
}
