/// <summary>
/// Reads built-in "odata." or custom instance annotation's value.
/// </summary>
/// <param name="annotatedPropertyName">The property name.</param>
/// <param name="annotationName">The annotation name</param>
/// <param name="propertyAndAnnotationCollector">The PropertyAndAnnotationCollector.</param>
/// <param name="readPropertyAnnotationValue">Callback to read the property annotation value.</param>
private void ReadODataOrCustomInstanceAnnotationValue(string annotatedPropertyName, string annotationName, PropertyAndAnnotationCollector propertyAndAnnotationCollector, Func <string, object> readPropertyAnnotationValue)
{
// Read over the property name.
this.JsonReader.Read();
if (ODataJsonLightReaderUtils.IsODataAnnotationName(annotationName))
{
// OData annotations are read
propertyAndAnnotationCollector.AddODataPropertyAnnotation(annotatedPropertyName, annotationName, readPropertyAnnotationValue(annotationName));
}
else
{
if (this.ShouldSkipCustomInstanceAnnotation(annotationName) || (this is ODataJsonLightErrorDeserializer && this.MessageReaderSettings.ShouldIncludeAnnotation == null))
{
propertyAndAnnotationCollector.CheckIfPropertyOpenForAnnotations(annotatedPropertyName, annotationName);
this.JsonReader.SkipValue();
}
else
{
Debug.Assert(ReadPropertyCustomAnnotationValue != null, "readPropertyCustomAnnotationValue != null");
propertyAndAnnotationCollector.AddCustomPropertyAnnotation(annotatedPropertyName, annotationName, ReadPropertyCustomAnnotationValue(propertyAndAnnotationCollector, annotationName));
}
}
}
/// <summary>
/// Parses JSON object property starting with the current position of the JSON reader.
/// </summary>
/// <param name="propertyAndAnnotationCollector">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(
PropertyAndAnnotationCollector propertyAndAnnotationCollector,
Func <string, object> readPropertyAnnotationValue,
out string parsedPropertyName)
{
Debug.Assert(propertyAndAnnotationCollector != null, "propertyAndAnnotationCollector != 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);
// reading a nested delta resource set
if (isPropertyAnnotation && String.CompareOrdinal(this.CompleteSimplifiedODataAnnotation(annotationNameFromReader), ODataAnnotationNames.ODataDelta) == 0)
{
// Read over the property name.
this.JsonReader.Read();
parsedPropertyName = propertyNameFromReader;
return(PropertyParsingResult.NestedDeltaResourceSet);
}
bool isInstanceAnnotation = false;
if (!isPropertyAnnotation)
{
isInstanceAnnotation = IsInstanceAnnotation(nameFromReader);
propertyNameFromReader = isInstanceAnnotation ? this.CompleteSimplifiedODataAnnotation(nameFromReader.Substring(1)) : 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(Strings.ODataJsonLightDeserializer_AnnotationTargetingInstanceAnnotationWithoutValue(lastPropertyAnnotationNameFound, parsedPropertyName));
}
return(PropertyParsingResult.PropertyWithoutValue);
}
object annotationValue = null;
if (isPropertyAnnotation)
{
annotationNameFromReader = this.CompleteSimplifiedODataAnnotation(annotationNameFromReader);
// If this is a unknown odata annotation targeting a property, we skip over it. See remark on the method SkippedOverUnknownODataAnnotation() for detailed explanation.
// 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 annotationValue))
{
propertyAndAnnotationCollector.AddODataPropertyAnnotation(propertyNameFromReader, annotationNameFromReader, annotationValue);
continue;
}
// We have another property annotation for the same property we parsed.
parsedPropertyName = propertyNameFromReader;
lastPropertyAnnotationNameFound = annotationNameFromReader;
this.ProcessPropertyAnnotation(propertyNameFromReader, annotationNameFromReader, propertyAndAnnotationCollector, readPropertyAnnotationValue);
continue;
}
// If this is a unknown odata annotation, skip over it. See remark on the method SkippedOverUnknownODataAnnotation() for detailed explanation.
if (isInstanceAnnotation && this.SkippedOverUnknownODataAnnotation(propertyNameFromReader, out annotationValue))
{
// collect 'odata.<unknown>' annotation:
// here we know the original property name contains no '@', but '.' dot
Debug.Assert(annotationNameFromReader == null, "annotationNameFromReader == null");
propertyAndAnnotationCollector.AddODataScopeAnnotation(propertyNameFromReader, annotationValue);
continue;
}
// We are encountering the property name for the first time.
// Don't read over property name, as that would cause the buffering reader to read ahead in the StartObject
// state, which would break our ability to stream inline json. Instead, callers of ParseProperty will have to
// call this.JsonReader.Read() as appropriate to read past the property name.
parsedPropertyName = propertyNameFromReader;
if (!isInstanceAnnotation && ODataJsonLightUtils.IsMetadataReferenceProperty(propertyNameFromReader))
{
return(PropertyParsingResult.MetadataReferenceProperty);
}
if (!isInstanceAnnotation && !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");
// Handle 'odata.XXXXX' annotations
if (isInstanceAnnotation && 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(Strings.ODataJsonLightDeserializer_AnnotationTargetingInstanceAnnotationWithoutValue(lastPropertyAnnotationNameFound, parsedPropertyName));
}
return(PropertyParsingResult.PropertyWithoutValue);
}
return(PropertyParsingResult.EndOfObject);
}