private bool ReadInternal <TWriteStrategy>() where TWriteStrategy : IWriteStrategy
{
var continuationState = _continuationState;
var currentState = continuationState.Pop();
var reader = _reader;
var state = _state;
while (true)
{
switch (currentState.State)
{
case ContinuationState.ReadObjectDocument:
if (reader.Read() == false)
{
continuationState.Push(currentState);
goto ReturnFalse;
}
currentState.State = ContinuationState.ReadObject;
continue;
case ContinuationState.ReadArrayDocument:
if (reader.Read() == false)
{
continuationState.Push(currentState);
goto ReturnFalse;
}
var fakeProperty = _context.CachedProperties.GetProperty(_fakeFieldName);
currentState.CurrentProperty = fakeProperty;
currentState.MaxPropertyId = fakeProperty.PropertyId;
currentState.FirstWrite = _writer.Position;
currentState.Properties = _propertiesCache.Allocate();
currentState.Properties.Add(new PropertyTag {
Property = fakeProperty
});
currentState.State = ContinuationState.CompleteDocumentArray;
continuationState.Push(currentState);
currentState = new BuildingState(ContinuationState.ReadArray);
continue;
case ContinuationState.CompleteDocumentArray:
currentState.Properties[0] = new PropertyTag(
type: (byte)_writeToken.WrittenToken,
property: currentState.Properties[0].Property,
position: _writeToken.ValuePos
);
// Register property position, name id (PropertyId) and type (object type and metadata)
_writeToken = _writer.WriteObjectMetadata(currentState.Properties, currentState.FirstWrite, currentState.MaxPropertyId);
goto ReturnTrue;
case ContinuationState.ReadObject:
if (state.CurrentTokenType == JsonParserToken.StartObject)
{
currentState.State = ContinuationState.ReadPropertyName;
currentState.Properties = _propertiesCache.Allocate();
currentState.FirstWrite = _writer.Position;
continue;
}
goto ErrorExpectedStartOfObject;
case ContinuationState.ReadArray:
if (state.CurrentTokenType == JsonParserToken.StartArray)
{
currentState.Types = _tokensCache.Allocate();
currentState.Positions = _positionsCache.Allocate();
currentState.State = ContinuationState.ReadArrayValue;
continue;
}
goto ErrorExpectedStartOfArray;
case ContinuationState.ReadArrayValue:
if (reader.Read() == false)
{
continuationState.Push(currentState);
goto ReturnFalse;
}
if (state.CurrentTokenType == JsonParserToken.EndArray)
{
currentState.State = ContinuationState.CompleteArray;
continue;
}
currentState.State = ContinuationState.CompleteArrayValue;
continuationState.Push(currentState);
currentState = new BuildingState(ContinuationState.ReadValue);
continue;
case ContinuationState.CompleteArrayValue:
currentState.Types.Add(_writeToken.WrittenToken);
currentState.Positions.Add(_writeToken.ValuePos);
currentState.State = ContinuationState.ReadArrayValue;
continue;
case ContinuationState.CompleteArray:
var arrayToken = BlittableJsonToken.StartArray;
var arrayInfoStart = _writer.WriteArrayMetadata(currentState.Positions, currentState.Types, ref arrayToken);
_writeToken = new WriteToken(arrayInfoStart, arrayToken);
currentState = continuationState.Pop();
continue;
case ContinuationState.ReadPropertyName:
if (ReadMaybeModifiedPropertyName() == false)
{
continuationState.Push(currentState);
goto ReturnFalse;
}
if (state.CurrentTokenType == JsonParserToken.EndObject)
{
_modifier?.EndObject();
_writeToken = _writer.WriteObjectMetadata(currentState.Properties, currentState.FirstWrite, currentState.MaxPropertyId);
if (continuationState.Count == 0)
{
goto ReturnTrue;
}
currentState = continuationState.Pop();
continue;
}
if (state.CurrentTokenType != JsonParserToken.String)
{
goto ErrorExpectedProperty;
}
var property = CreateLazyStringValueFromParserState();
currentState.CurrentProperty = _context.CachedProperties.GetProperty(property);
currentState.MaxPropertyId = Math.Max(currentState.MaxPropertyId, currentState.CurrentProperty.PropertyId);
currentState.State = ContinuationState.ReadPropertyValue;
continue;
case ContinuationState.ReadPropertyValue:
if (reader.Read() == false)
{
continuationState.Push(currentState);
goto ReturnFalse;
}
currentState.State = ContinuationState.CompleteReadingPropertyValue;
continuationState.Push(currentState);
currentState = new BuildingState(ContinuationState.ReadValue);
continue;
case ContinuationState.CompleteReadingPropertyValue:
// Register property position, name id (PropertyId) and type (object type and metadata)
currentState.Properties.Add(new PropertyTag(
position: _writeToken.ValuePos,
type: (byte)_writeToken.WrittenToken,
property: currentState.CurrentProperty));
currentState.State = ContinuationState.ReadPropertyName;
continue;
case ContinuationState.ReadValue:
ReadJsonValue <TWriteStrategy>();
currentState = _continuationState.Pop();
break;
}
}
ReturnTrue : return(true);
ReturnFalse : return(false);
ErrorExpectedProperty : ThrowExpectedProperty();
ErrorExpectedStartOfObject : ThrowExpectedStartOfObject();
ErrorExpectedStartOfArray : ThrowExpectedStartOfArray();
return(false); // Will never execute.
}
