// constructors
/// <summary>
/// Initializes a new instance of the BsonDocumentReader class.
/// </summary>
/// <param name="document">A BsonDocument.</param>
/// <param name="settings">The reader settings.</param>
public BsonDocumentReader(BsonDocument document, BsonDocumentReaderSettings settings)
: base(settings)
{
_context = new BsonDocumentReaderContext(null, ContextType.TopLevel, document);
_currentValue = document;
_documentReaderSettings = settings; // already frozen by base class
}
/// <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();
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.");
}
}
internal BsonDocumentReaderContext(
BsonDocumentReaderContext parentContext,
ContextType contextType,
BsonDocument document)
{
_parentContext = parentContext;
_contextType = contextType;
_document = document;
}
// constructors
internal BsonDocumentReaderContext(
BsonDocumentReaderContext parentContext,
ContextType contextType,
BsonArray array)
{
_parentContext = parentContext;
_contextType = contextType;
_array = array;
}
internal BsonDocumentReaderContext(
BsonDocumentReaderContext parentContext,
ContextType contextType,
BsonDocument document)
{
_parentContext = parentContext;
_contextType = contextType;
_document = document;
}
// constructors
internal BsonDocumentReaderContext(
BsonDocumentReaderContext parentContext,
ContextType contextType,
BsonArray array)
{
_parentContext = parentContext;
_contextType = contextType;
_array = array;
}
/// <summary>
/// Returns the reader to previously bookmarked position and state.
/// </summary>
/// <param name="bookmark">The bookmark.</param>
public override void ReturnToBookmark(BsonReaderBookmark bookmark)
{
var documentReaderBookmark = (BsonDocumentReaderBookmark)bookmark;
State = documentReaderBookmark.State;
CurrentBsonType = documentReaderBookmark.CurrentBsonType;
CurrentName = documentReaderBookmark.CurrentName;
_context = documentReaderBookmark.CloneContext();
_currentValue = documentReaderBookmark.CurrentValue;
}
// constructors
internal BsonDocumentReaderBookmark(
BsonReaderState state,
BsonType currentBsonType,
string currentName,
BsonDocumentReaderContext context,
BsonValue currentValue)
: base(state, currentBsonType, currentName)
{
_context = context.Clone();
_currentValue = currentValue;
}
// constructors
internal BsonDocumentReaderBookmark(
BsonReaderState state,
BsonType currentBsonType,
string currentName,
BsonDocumentReaderContext context,
BsonValue currentValue)
: base(state, currentBsonType, currentName)
{
_context = context.Clone();
_currentValue = currentValue;
}
// constructors
/// <summary>
/// Initializes a new instance of the BsonDocumentReader class.
/// </summary>
/// <param name="document">A BsonDocument.</param>
/// <param name="settings">The reader settings.</param>
public BsonDocumentReader(BsonDocument document, BsonDocumentReaderSettings settings)
: base(settings)
{
if (document == null)
{
throw new ArgumentNullException("document");
}
_context = new BsonDocumentReaderContext(null, ContextType.TopLevel, document);
_currentValue = document;
_documentReaderSettings = settings; // already frozen by base class
}
/// <summary>
/// Reads the start of a BSON array.
/// </summary>
public override void ReadStartArray()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadStartArray", BsonType.Array);
var array = _currentValue.AsBsonArray;
_context = new BsonDocumentReaderContext(_context, ContextType.Array, array);
State = BsonReaderState.Type;
}
// used by Clone
private BsonDocumentReaderContext(
BsonDocumentReaderContext parentContext,
ContextType contextType,
BsonDocument document,
BsonArray array,
int index)
{
_parentContext = parentContext;
_contextType = contextType;
_document = document;
_array = array;
_index = index;
}
// used by Clone
private BsonDocumentReaderContext(
BsonDocumentReaderContext parentContext,
ContextType contextType,
BsonDocument document,
BsonArray array,
int index)
{
_parentContext = parentContext;
_contextType = contextType;
_document = document;
_array = array;
_index = index;
}
/// <summary>
/// Reads the start of a BSON document.
/// </summary>
public override void ReadStartDocument()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadStartDocument", BsonType.Document);
BsonDocument document;
var script = _currentValue as BsonJavaScriptWithScope;
if (script != null)
{
document = script.Scope;
}
else
{
document = _currentValue.AsBsonDocument;
}
_context = new BsonDocumentReaderContext(_context, ContextType.Document, document);
State = BsonReaderState.Type;
}