/// <summary>
/// Process the current property annotation.
/// </summary>
/// <param name="annotatedPropertyName">The name being annotated. Can be a property or an instance annotation.</param>
/// <param name="annotationName">The annotation targeting the <paramref name="annotatedPropertyName"/>.</param>
/// <param name="duplicatePropertyNamesChecker">The duplicate property names checker.</param>
/// <param name="readPropertyAnnotationValue">Callback to read the property annotation value.</param>
private void ProcessPropertyAnnotation(string annotatedPropertyName, string annotationName, DuplicatePropertyNamesChecker duplicatePropertyNamesChecker, Func <string, object> readPropertyAnnotationValue)
{
// We don't currently support annotation targeting an instance annotation except for the @odata.type property annotation.
if (ODataJsonLightReaderUtils.IsAnnotationProperty(annotatedPropertyName) && string.CompareOrdinal(annotationName, ODataAnnotationNames.ODataType) != 0)
{
throw new ODataException(OData.Strings.ODataJsonLightDeserializer_OnlyODataTypeAnnotationCanTargetInstanceAnnotation(annotationName, annotatedPropertyName, ODataAnnotationNames.ODataType));
}
// Read over the property name.
this.JsonReader.Read();
if (ODataJsonLightReaderUtils.IsODataAnnotationName(annotationName))
{
// OData annotations are read.
duplicatePropertyNamesChecker.AddODataPropertyAnnotation(annotatedPropertyName, annotationName, readPropertyAnnotationValue(annotationName));
}
else
{
// All other property annotations are ignored.
duplicatePropertyNamesChecker.AddCustomPropertyAnnotation(annotatedPropertyName, annotationName);
this.JsonReader.SkipValue();
}
}
/// <summary>
/// Detects the payload kind(s).
/// </summary>
/// <param name="detectionInfo">Additional information available for the payload kind detection.</param>
/// <returns>An enumerable of zero, one or more payload kinds that were detected from looking at the payload in the message stream.</returns>
private IEnumerable <ODataPayloadKind> DetectPayloadKindImplementation(ODataPayloadKindDetectionInfo detectionInfo)
{
Debug.Assert(detectionInfo != null, "detectionInfo != null");
Debug.Assert(this.JsonReader.DisableInStreamErrorDetection, "The in-stream error detection should be disabled for payload kind detection.");
this.AssertJsonCondition(JsonNodeType.Property, JsonNodeType.EndObject);
// If we found a metadata URI and parsed it, look at the detected payload kind and return it.
if (this.MetadataUriParseResult != null)
{
// Store the parsed metadata URI on the input context so we can avoid parsing it again.
detectionInfo.SetPayloadKindDetectionFormatState(new ODataJsonLightPayloadKindDetectionState(this.MetadataUriParseResult));
return(this.MetadataUriParseResult.DetectedPayloadKinds);
}
// Otherwise this is a payload without metadata URI and we have to start sniffing; only odata.error payloads
// don't have a metadata URI so check for a single 'odata.error' property (ignoring custom annotations).
ODataError error = null;
while (this.JsonReader.NodeType == JsonNodeType.Property)
{
string propertyName = this.JsonReader.ReadPropertyName();
if (!ODataJsonLightReaderUtils.IsAnnotationProperty(propertyName))
{
// If we find a non-annotation property, this is not an error payload
return(Enumerable.Empty <ODataPayloadKind>());
}
string annotatedPropertyName, annotationName;
if (!ODataJsonLightDeserializer.TryParsePropertyAnnotation(propertyName, out annotatedPropertyName, out annotationName))
{
// Instance annotation; check for odata.error
if (ODataJsonLightReaderUtils.IsODataAnnotationName(propertyName))
{
if (string.CompareOrdinal(ODataAnnotationNames.ODataError, propertyName) == 0)
{
// If we find multiple errors or an invalid error value, this is not an error payload.
if (error != null || !this.JsonReader.StartBufferingAndTryToReadInStreamErrorPropertyValue(out error))
{
return(Enumerable.Empty <ODataPayloadKind>());
}
// At this point we successfully read the first odata.error property.
// Skip the error value and check whether there are more properties.
this.JsonReader.SkipValue();
}
else
{
// Any odata.* instance annotations other than odata.error are not allowed for errors.
return(Enumerable.Empty <ODataPayloadKind>());
}
}
else
{
// Skip custom instance annotations
this.JsonReader.SkipValue();
}
}
else
{
// Property annotation; not allowed for errors
return(Enumerable.Empty <ODataPayloadKind>());
}
}
// If we got here without finding a metadata URI or an error payload, we don't know what this is.
if (error == null)
{
return(Enumerable.Empty <ODataPayloadKind>());
}
return(new ODataPayloadKind[] { ODataPayloadKind.Error });
}
/// <summary>
/// Parses JSON object property starting with the current position of the JSON reader.
/// </summary>
/// <param name="duplicatePropertyNamesChecker">The duplicate property names checker to use, it will also store the property annotations found.</param>
/// <param name="readPropertyAnnotationValue">Function called to read property annotation value.</param>
/// <param name="parsedPropertyName">The name of the property or instance annotation found.</param>
/// <returns>
/// PropertyWithValue - a property with value was found. The <paramref name="parsedPropertyName"/> contains the name of the property.
/// The reader is positioned on the property value.
/// PropertyWithoutValue - a property without a value was found. The <paramref name="parsedPropertyName"/> contains the name of the property.
/// The reader is positioned on the node after property annotations (so either a property or end of object).
/// ODataInstanceAnnotation - an odata instance annotation was found. The <paramref name="parsedPropertyName"/> contains the name of the annotation.
/// The reader is positioned on the value of the annotation.
/// CustomInstanceAnnotation - a custom instance annotation was found. The <paramref name="parsedPropertyName"/> contains the name of the annotation.
/// The reader is positioned on the value of the annotation.
/// MetadataReferenceProperty - a property which is a reference into the metadata was found.
/// The reader is positioned on the value of the property.
/// EndOfObject - end of the object scope was reached and no properties are to be reported. The <paramref name="parsedPropertyName"/> is null.
/// This can only happen if there's a property annotation which is ignored (for example custom one) at the end of the object.
/// </returns>
private PropertyParsingResult ParseProperty(
DuplicatePropertyNamesChecker duplicatePropertyNamesChecker,
Func <string, object> readPropertyAnnotationValue,
out string parsedPropertyName)
{
Debug.Assert(duplicatePropertyNamesChecker != null, "duplicatePropertyNamesChecker != null");
Debug.Assert(readPropertyAnnotationValue != null, "readPropertyAnnotationValue != null");
string lastPropertyAnnotationNameFound = null;
parsedPropertyName = null;
while (this.JsonReader.NodeType == JsonNodeType.Property)
{
string nameFromReader = this.JsonReader.GetPropertyName();
string propertyNameFromReader, annotationNameFromReader;
bool isPropertyAnnotation = TryParsePropertyAnnotation(nameFromReader, out propertyNameFromReader, out annotationNameFromReader);
propertyNameFromReader = propertyNameFromReader ?? nameFromReader;
// If parsedPropertyName is set and is different from the property name the reader is currently on,
// we have parsed a property annotation for a different property than the one at the current position.
if (parsedPropertyName != null && string.CompareOrdinal(parsedPropertyName, propertyNameFromReader) != 0)
{
if (ODataJsonLightReaderUtils.IsAnnotationProperty(parsedPropertyName))
{
throw new ODataException(OData.Strings.ODataJsonLightDeserializer_AnnotationTargetingInstanceAnnotationWithoutValue(lastPropertyAnnotationNameFound, parsedPropertyName));
}
return(PropertyParsingResult.PropertyWithoutValue);
}
duplicatePropertyNamesChecker.AnnotationCollector.ShouldCollectAnnotation =
(this.MessageReaderSettings.UndeclaredPropertyBehaviorKinds
== ODataUndeclaredPropertyBehaviorKinds.SupportUndeclaredValueProperty);
string skippedRawJson = null;
if (isPropertyAnnotation)
{
duplicatePropertyNamesChecker.AnnotationCollector.TryPeekAndCollectAnnotationRawJson(
this.JsonReader, propertyNameFromReader, annotationNameFromReader);
// If this is a unknown odata annotation targeting a property, we skip over it. See remark on the method SkippedOverUnknownODataAnnotation() for detailed explaination.
// Note that we don't skip over unknown odata annotations targeting another annotation. We don't allow annotations (except odata.type) targeting other annotations,
// so this.ProcessPropertyAnnotation() will test and fail for that case.
if (!ODataJsonLightReaderUtils.IsAnnotationProperty(propertyNameFromReader) && this.SkippedOverUnknownODataAnnotation(annotationNameFromReader, out skippedRawJson))
{
continue;
}
// We have another property annotation for the same property we parsed.
parsedPropertyName = propertyNameFromReader;
lastPropertyAnnotationNameFound = annotationNameFromReader;
this.ProcessPropertyAnnotation(propertyNameFromReader, annotationNameFromReader, duplicatePropertyNamesChecker, readPropertyAnnotationValue);
continue;
}
// If this is a unknown odata annotation, skip over it. See remark on the method SkippedOverUnknownODataAnnotation() for detailed explaination.
if (this.SkippedOverUnknownODataAnnotation(propertyNameFromReader, out skippedRawJson))
{
// collect 'odata.<unknown>' annotation:
// here we know the original property name contains no '@', but '.' dot
Debug.Assert(annotationNameFromReader == null, "annotationNameFromReader == null");
duplicatePropertyNamesChecker.AnnotationCollector.TryAddPropertyAnnotationRawJson(
"", propertyNameFromReader, skippedRawJson);
continue;
}
// We are encountering the property name for the first time.
// Read over the property name.
this.JsonReader.Read();
parsedPropertyName = propertyNameFromReader;
if (ODataJsonLightUtils.IsMetadataReferenceProperty(propertyNameFromReader))
{
return(PropertyParsingResult.MetadataReferenceProperty);
}
if (!ODataJsonLightReaderUtils.IsAnnotationProperty(propertyNameFromReader))
{
// Normal property
return(PropertyParsingResult.PropertyWithValue);
}
// collect 'xxx.yyyy' annotation:
// here we know the original property name contains no '@', but '.' dot
Debug.Assert(annotationNameFromReader == null, "annotationNameFromReader == null");
duplicatePropertyNamesChecker.AnnotationCollector.TryPeekAndCollectAnnotationRawJson(
this.JsonReader, "", propertyNameFromReader); // propertyNameFromReader is the annotation name
// Handle 'odata.XXXXX' annotations
if (ODataJsonLightReaderUtils.IsODataAnnotationName(propertyNameFromReader))
{
return(PropertyParsingResult.ODataInstanceAnnotation);
}
// Handle custom annotations
return(PropertyParsingResult.CustomInstanceAnnotation);
}
this.AssertJsonCondition(JsonNodeType.EndObject);
if (parsedPropertyName != null)
{
if (ODataJsonLightReaderUtils.IsAnnotationProperty(parsedPropertyName))
{
throw new ODataException(OData.Strings.ODataJsonLightDeserializer_AnnotationTargetingInstanceAnnotationWithoutValue(lastPropertyAnnotationNameFound, parsedPropertyName));
}
return(PropertyParsingResult.PropertyWithoutValue);
}
return(PropertyParsingResult.EndOfObject);
}
