/// <summary>
/// Reads the end of a BSON document from the reader.
/// </summary>
public override void ReadEndDocument()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
if (_context.ContextType != ContextType.Document && _context.ContextType != ContextType.ScopeDocument)
{
ThrowInvalidContextType("ReadEndDocument", _context.ContextType, ContextType.Document, ContextType.ScopeDocument);
}
if (State == BsonReaderState.Type)
{
ReadBsonType(); // will set state to EndOfDocument if at end of document
}
if (State != BsonReaderState.EndOfDocument)
{
ThrowInvalidState("ReadEndDocument", BsonReaderState.EndOfDocument);
}
_context = _context.PopContext(_buffer.Position);
if (_context != null && _context.ContextType == ContextType.JavaScriptWithScope)
{
_context = _context.PopContext(_buffer.Position); // JavaScriptWithScope
}
switch (_context.ContextType)
{
case ContextType.Array: State = BsonReaderState.Type; break;
case ContextType.Document: State = BsonReaderState.Type; break;
case ContextType.TopLevel: State = BsonReaderState.Done; break;
default: throw new BsonInternalException("Unexpected ContextType.");
}
}
/// <summary>
/// Reads a raw BSON document.
/// </summary>
/// <returns>
/// The raw BSON document.
/// </returns>
public override IByteBuffer ReadRawBsonDocument()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadRawBsonDocument", BsonType.Document);
var position = _buffer.Position;
var length = _buffer.ReadInt32();
var slice = _buffer.ByteBuffer.GetSlice(position, length);
_buffer.Position = position + length;
if (_context.ContextType == ContextType.JavaScriptWithScope)
{
_context = _context.PopContext(_buffer.Position); // JavaScriptWithScope
}
switch (_context.ContextType)
{
case ContextType.Array: State = BsonReaderState.Type; break;
case ContextType.Document: State = BsonReaderState.Type; break;
case ContextType.TopLevel: State = BsonReaderState.Done; break;
default: throw new BsonInternalException("Unexpected ContextType.");
}
return(slice);
}
/// <summary>
/// Reads the end of a BSON array from the reader.
/// </summary>
public override void ReadEndArray()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
if (_context.ContextType != ContextType.Array)
{
ThrowInvalidContextType("ReadEndArray", _context.ContextType, ContextType.Array);
}
if (State == BsonReaderState.Type)
{
ReadBsonType(); // will set state to EndOfArray if at end of array
}
if (State != BsonReaderState.EndOfArray)
{
ThrowInvalidState("ReadEndArray", BsonReaderState.EndOfArray);
}
_context = _context.PopContext(_buffer.Position);
switch (_context.ContextType)
{
case ContextType.Array: State = BsonReaderState.Type; break;
case ContextType.Document: State = BsonReaderState.Type; break;
case ContextType.TopLevel: State = BsonReaderState.Done; break;
default: throw new BsonInternalException("Unexpected ContextType.");
}
}
/// <summary>
/// Returns the reader to previously bookmarked position and state.
/// </summary>
/// <param name="bookmark">The bookmark.</param>
public override void ReturnToBookmark(BsonReaderBookmark bookmark)
{
var binaryReaderBookmark = (BsonBinaryReaderBookmark)bookmark;
State = binaryReaderBookmark.State;
CurrentBsonType = binaryReaderBookmark.CurrentBsonType;
CurrentName = binaryReaderBookmark.CurrentName;
_context = binaryReaderBookmark.CloneContext();
_buffer.Position = binaryReaderBookmark.Position;
}
// constructors
internal BsonBinaryReaderContext(
BsonBinaryReaderContext parentContext,
ContextType contextType,
int startPosition,
int size)
{
_parentContext = parentContext;
_contextType = contextType;
_startPosition = startPosition;
_size = size;
}
// constructors
internal BsonBinaryReaderContext(
BsonBinaryReaderContext parentContext,
ContextType contextType,
int startPosition,
int size)
{
_parentContext = parentContext;
_contextType = contextType;
_startPosition = startPosition;
_size = size;
}
// constructors
internal BsonBinaryReaderBookmark(
BsonReaderState state,
BsonType currentBsonType,
string currentName,
BsonBinaryReaderContext context,
int position)
: base(state, currentBsonType, currentName)
{
_context = context.Clone();
_position = position;
}
// constructors
internal BsonBinaryReaderBookmark(
BsonReaderState state,
BsonType currentBsonType,
string currentName,
BsonBinaryReaderContext context,
int position)
: base(state, currentBsonType, currentName)
{
_context = context.Clone();
_position = position;
}
/// <summary>
/// Reads the start of a BSON array.
/// </summary>
public override void ReadStartArray()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadStartArray", BsonType.Array);
var startPosition = _buffer.Position; // position of size field
var size = ReadSize();
_context = new BsonBinaryReaderContext(_context, ContextType.Array, startPosition, size);
State = BsonReaderState.Type;
}
/// <summary>
/// Initializes a new instance of the BsonBinaryReader class.
/// </summary>
/// <param name="buffer">A BsonBuffer.</param>
/// <param name="disposeBuffer">if set to <c>true</c> this BsonBinaryReader will own the buffer and when Dispose is called the buffer will be Disposed also.</param>
/// <param name="settings">A BsonBinaryReaderSettings.</param>
/// <exception cref="System.ArgumentNullException">
/// buffer
/// or
/// settings
/// </exception>
public BsonBinaryReader(BsonBuffer buffer, bool disposeBuffer, BsonBinaryReaderSettings settings)
: base(settings)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
_buffer = buffer;
_disposeBuffer = disposeBuffer;
_binaryReaderSettings = settings; // already frozen by base class
_context = new BsonBinaryReaderContext(null, ContextType.TopLevel, 0, 0);
}
/// <summary>
/// Reads the start of a BSON document.
/// </summary>
public override void ReadStartDocument()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadStartDocument", BsonType.Document);
var contextType = (State == BsonReaderState.ScopeDocument) ? ContextType.ScopeDocument : ContextType.Document;
var startPosition = _buffer.Position; // position of size field
var size = ReadSize();
_context = new BsonBinaryReaderContext(_context, contextType, startPosition, size);
State = BsonReaderState.Type;
}
// constructors
/// <summary>
/// Initializes a new instance of the BsonBinaryReader class.
/// </summary>
/// <param name="buffer">A BsonBuffer.</param>
/// <param name="settings">A BsonBinaryReaderSettings.</param>
public BsonBinaryReader(BsonBuffer buffer, BsonBinaryReaderSettings settings)
: base(settings)
{
if (buffer == null)
{
_buffer = new BsonBuffer();
_disposeBuffer = true; // only call Dispose if we allocated the buffer
}
else
{
_buffer = buffer;
_disposeBuffer = false;
}
_binaryReaderSettings = settings; // already frozen by base class
_context = new BsonBinaryReaderContext(null, ContextType.TopLevel, 0, 0);
}
/// <summary>
/// Reads a BSON JavaScript with scope from the reader (call ReadStartDocument next to read the scope).
/// </summary>
/// <returns>A string.</returns>
public override string ReadJavaScriptWithScope()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadJavaScriptWithScope", BsonType.JavaScriptWithScope);
var startPosition = _buffer.Position; // position of size field
var size = ReadSize();
_context = new BsonBinaryReaderContext(_context, ContextType.JavaScriptWithScope, startPosition, size);
var code = _buffer.ReadString();
State = BsonReaderState.ScopeDocument;
return(code);
}
