/// <summary>Constructor.</summary>
/// <param name="format">The format for this input context.</param>
/// <param name="reader">The reader to read data from.</param>
/// <param name="messageReaderSettings">Configuration settings of the OData reader.</param>
/// <param name="version">The OData protocol version to be used for reading the payload.</param>
/// <param name="readingResponse">true if reading a response message; otherwise false.</param>
/// <param name="synchronous">true if the input should be read synchronously; false if it should be read asynchronously.</param>
/// <param name="model">The model to use.</param>
/// <param name="urlResolver">The optional URL resolver to perform custom URL resolution for URLs read from the payload.</param>
internal ODataJsonInputContext(
ODataFormat format,
TextReader reader,
ODataMessageReaderSettings messageReaderSettings,
ODataVersion version,
bool readingResponse,
bool synchronous,
IEdmModel model,
IODataUrlResolver urlResolver)
: base(format, messageReaderSettings, version, readingResponse, synchronous, model, urlResolver)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(reader != null, "reader != null");
ExceptionUtils.CheckArgumentNotNull(format, "format");
ExceptionUtils.CheckArgumentNotNull(messageReaderSettings, "messageReaderSettings");
try
{
this.textReader = reader;
this.jsonReader = new BufferingJsonReader(this.textReader, /*removeDuplicateProperties*/ this.UseServerFormatBehavior, messageReaderSettings.MessageQuotas.MaxNestingDepth);
}
catch (Exception e)
{
// Dispose the message stream if we failed to create the input context.
if (ExceptionUtils.IsCatchableExceptionType(e) && reader != null)
{
reader.Dispose();
}
throw;
}
}
/// <summary>
/// Tries to read a null value from the JSON reader.
/// </summary>
/// <param name="jsonReader">The JSON reader to read from.</param>
/// <param name="inputContext">The input context with all the settings.</param>
/// <param name="expectedTypeReference">The expected type reference of the value.</param>
/// <param name="validateNullValue">true to validate null values; otherwise false.</param>
/// <param name="propertyName">The name of the property whose value is being read, if applicable (used for error reporting).</param>
/// <returns>true if a null value could be read from the JSON reader; otherwise false.</returns>
/// <remarks>If the method detects a null value it will read it (position the reader after the null value);
/// otherwise the reader does not move.</remarks>
internal static bool TryReadNullValue(
BufferingJsonReader jsonReader,
ODataInputContext inputContext,
IEdmTypeReference expectedTypeReference,
bool validateNullValue,
string propertyName)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(jsonReader != null, "jsonReader != null");
Debug.Assert(inputContext != null, "inputContext != null");
if (jsonReader.NodeType == JsonNodeType.PrimitiveValue && jsonReader.Value == null)
{
jsonReader.ReadNext();
// NOTE: when reading a null value we will never ask the type resolver (if present) to resolve the
// type; we always fall back to the expected type.
ReaderValidationUtils.ValidateNullValue(
inputContext.Model,
expectedTypeReference,
inputContext.MessageReaderSettings,
validateNullValue,
inputContext.Version,
propertyName);
return(true);
}
return(false);
}
/// <summary>
/// Try and parse spatial type from the json payload.
/// </summary>
/// <param name="jsonReader">The JSON reader to read from.</param>
/// <param name="insideJsonObjectValue">true if the reader is positioned on the first property of the value which is a JSON Object
/// (or the second property if the first one was odata.type).</param>
/// <param name="inputContext">The input context with all the settings.</param>
/// <param name="expectedValueTypeReference">Expected edm property type.</param>
/// <param name="validateNullValue">true to validate null values; otherwise false.</param>
/// <param name="recursionDepth">The recursion depth to start with.</param>
/// <param name="propertyName">The name of the property whose value is being read, if applicable (used for error reporting).</param>
/// <returns>An instance of the spatial type.</returns>
internal static ISpatial ReadSpatialValue(
BufferingJsonReader jsonReader,
bool insideJsonObjectValue,
ODataInputContext inputContext,
IEdmPrimitiveTypeReference expectedValueTypeReference,
bool validateNullValue,
int recursionDepth,
string propertyName)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(jsonReader != null, "jsonReader != null");
Debug.Assert(inputContext != null, "inputContext != null");
Debug.Assert(expectedValueTypeReference != null, "expectedValueTypeReference != null");
Debug.Assert(expectedValueTypeReference.IsSpatial(), "TryParseSpatialType must be called only with spatial types");
// Note that we made sure that payload type detection will not return spatial for <V3 payloads
// So the only way we can get a spatial type reference is if it comes from the model,
// in which case we want to fail for <V3 payloads, since we can't report spatial values from such payloads.
ODataVersionChecker.CheckSpatialValue(inputContext.Version);
// Spatial value can be either null constant or a JSON object
// If it's a null primitive value, report a null value.
if (!insideJsonObjectValue && TryReadNullValue(jsonReader, inputContext, expectedValueTypeReference, validateNullValue, propertyName))
{
return(null);
}
System.Spatial.ISpatial spatialValue = null;
if (insideJsonObjectValue || jsonReader.NodeType == JsonNodeType.StartObject)
{
IDictionary <string, object> jsonObject = ReadObjectValue(jsonReader, insideJsonObjectValue, inputContext, recursionDepth);
System.Spatial.GeoJsonObjectFormatter jsonObjectFormatter =
System.Spatial.SpatialImplementation.CurrentImplementation.CreateGeoJsonObjectFormatter();
if (EdmLibraryExtensions.IsGeographyType(expectedValueTypeReference))
{
spatialValue = jsonObjectFormatter.Read <System.Spatial.Geography>(jsonObject);
}
else
{
spatialValue = jsonObjectFormatter.Read <System.Spatial.Geometry>(jsonObject);
}
}
if (spatialValue == null)
{
throw new ODataException(ODataErrorStrings.ODataJsonReaderCoreUtils_CannotReadSpatialPropertyValue);
}
return(spatialValue);
}
protected override void DisposeImplementation()
{
try
{
if (this.textReader != null)
{
this.textReader.Dispose();
}
}
finally
{
this.textReader = null;
this.jsonReader = null;
}
}
internal ODataJsonInputContext(ODataFormat format, TextReader reader, ODataMessageReaderSettings messageReaderSettings, ODataVersion version, bool readingResponse, bool synchronous, IEdmModel model, IODataUrlResolver urlResolver) : base(format, messageReaderSettings, version, readingResponse, synchronous, model, urlResolver)
{
ExceptionUtils.CheckArgumentNotNull <ODataFormat>(format, "format");
ExceptionUtils.CheckArgumentNotNull <ODataMessageReaderSettings>(messageReaderSettings, "messageReaderSettings");
try
{
this.textReader = reader;
this.jsonReader = new BufferingJsonReader(this.textReader, base.UseServerFormatBehavior, messageReaderSettings.MessageQuotas.MaxNestingDepth);
}
catch (Exception exception)
{
if (ExceptionUtils.IsCatchableExceptionType(exception) && (reader != null))
{
reader.Dispose();
}
throw;
}
}
internal static void AssertNotBuffering(this BufferingJsonReader bufferedJsonReader)
{
}