/// <summary>
/// Read an entity reference link.
/// </summary>
/// <param name="duplicatePropertyNamesChecker">The duplicate property names checker to check for duplicate properties and
/// duplicate annotations; this is a separate instance per entity reference link.</param>
/// <param name="topLevel">true if we are reading a singleton entity reference link at the top level; false if we are reading
/// an entity reference link as part of a collection of entity reference links.</param>
/// <returns>An instance of <see cref="ODataEntityReferenceLink"/> which was read.</returns>
/// <remarks>
/// Pre-Condition: StartObject when the entity reference link is part of a collection
/// Property the first property in the entity reference link (for a top-level link)
/// EndObject the end object node of an entity reference link (for a top-level link)
/// Post-Condition: EndInput for a top-level object
/// EndArray for the last link in a collection of links
/// Any for the first node of the next link in a collection of links
/// </remarks>
private ODataEntityReferenceLink ReadSingleEntityReferenceLink(DuplicatePropertyNamesChecker duplicatePropertyNamesChecker, bool topLevel)
{
this.JsonReader.AssertNotBuffering();
if (!topLevel)
{
if (this.JsonReader.NodeType != JsonNodeType.StartObject)
{
// entity reference link has to be an object
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_EntityReferenceLinkMustBeObjectValue(this.JsonReader.NodeType));
}
this.JsonReader.ReadStartObject();
}
this.AssertJsonCondition(JsonNodeType.Property, JsonNodeType.EndObject);
ODataEntityReferenceLink[] entityReferenceLink = { null };
// Entity reference links use instance annotations. Fail if we find a property annotation.
Func <string, object> propertyAnnotationValueReader =
annotationName => { throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_PropertyAnnotationForEntityReferenceLink(annotationName)); };
while (this.JsonReader.NodeType == JsonNodeType.Property)
{
this.ProcessProperty(
duplicatePropertyNamesChecker,
propertyAnnotationValueReader,
(propertyParsingResult, propertyName) =>
{
switch (propertyParsingResult)
{
case PropertyParsingResult.ODataInstanceAnnotation:
if (string.CompareOrdinal(ODataAnnotationNames.ODataId, propertyName) != 0)
{
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_InvalidPropertyInEntityReferenceLink(propertyName, ODataAnnotationNames.ODataId));
}
else if (entityReferenceLink[0] != null)
{
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_MultipleUriPropertiesInEntityReferenceLink(ODataAnnotationNames.ODataId));
}
// read the value of the 'odata.id' annotation
string urlString = this.JsonReader.ReadStringValue(ODataAnnotationNames.ODataId);
if (urlString == null)
{
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_EntityReferenceLinkUrlCannotBeNull(ODataAnnotationNames.ODataId));
}
entityReferenceLink[0] = new ODataEntityReferenceLink
{
Url = this.ProcessUriFromPayload(urlString)
};
ReaderValidationUtils.ValidateEntityReferenceLink(entityReferenceLink[0]);
break;
case PropertyParsingResult.CustomInstanceAnnotation:
if (entityReferenceLink[0] == null)
{
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_MissingEntityReferenceLinkProperty(ODataAnnotationNames.ODataId));
}
Debug.Assert(!string.IsNullOrEmpty(propertyName), "!string.IsNullOrEmpty(propertyName)");
this.AssertJsonCondition(JsonNodeType.PrimitiveValue, JsonNodeType.StartObject, JsonNodeType.StartArray);
ODataAnnotationNames.ValidateIsCustomAnnotationName(propertyName);
Debug.Assert(
!this.MessageReaderSettings.ShouldSkipAnnotation(propertyName),
"!this.MessageReaderSettings.ShouldReadAndValidateAnnotation(propertyName) -- otherwise we should have already skipped the custom annotation and won't see it here.");
object annotationValue = this.ReadCustomInstanceAnnotationValue(duplicatePropertyNamesChecker, propertyName);
entityReferenceLink[0].InstanceAnnotations.Add(new ODataInstanceAnnotation(propertyName, annotationValue.ToODataValue()));
break;
case PropertyParsingResult.PropertyWithValue:
case PropertyParsingResult.PropertyWithoutValue:
// entity reference link is denoted by odata.id annotation
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_InvalidAnnotationInEntityReferenceLink(propertyName));
case PropertyParsingResult.EndOfObject:
break;
case PropertyParsingResult.MetadataReferenceProperty:
throw new ODataException(ODataErrorStrings.ODataJsonLightPropertyAndValueDeserializer_UnexpectedMetadataReferenceProperty(propertyName));
default:
throw new ODataException(ODataErrorStrings.General_InternalError(InternalErrorCodes.ODataJsonLightEntityReferenceLinkDeserializer_ReadSingleEntityReferenceLink));
}
});
}
if (entityReferenceLink[0] == null)
{
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_MissingEntityReferenceLinkProperty(ODataAnnotationNames.ODataId));
}
// end of the entity reference link object
this.JsonReader.ReadEndObject();
this.JsonReader.AssertNotBuffering();
return(entityReferenceLink[0]);
}
/// <summary>
/// Reads the entity reference link instance annotations.
/// </summary>
/// <param name="links">The <see cref="ODataEntityReferenceLinks"/> to read the annotations for.</param>
/// <param name="duplicatePropertyNamesChecker">The duplicate property names checker for the entity reference links scope.</param>
/// <param name="forLinksStart">true when parsing the instance annotations before the 'value' property;
/// false when parsing the instance annotations after the 'value' property.</param>
/// <remarks>
/// Pre-Condition: JsonNodeType.Property The first property in the payload (or the first property after the context URI in responses)
/// JsonNodeType.EndObject The end of the entity reference links object
/// Post-Condition: JsonNodeType.EndObject When the end of the entity reference links object is reached
/// Any The first node of the value of the 'url' property (if found)
/// </remarks>
private void ReadEntityReferenceLinksAnnotations(ODataEntityReferenceLinks links, DuplicatePropertyNamesChecker duplicatePropertyNamesChecker, bool forLinksStart)
{
Debug.Assert(links != null, "links != null");
Debug.Assert(duplicatePropertyNamesChecker != null, "duplicatePropertyNamesChecker != null");
this.AssertJsonCondition(JsonNodeType.Property, JsonNodeType.EndObject);
this.JsonReader.AssertNotBuffering();
while (this.JsonReader.NodeType == JsonNodeType.Property)
{
// OData property annotations are not supported on entity reference links.
Func <string, object> propertyAnnotationValueReader =
annotationName => { throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_PropertyAnnotationForEntityReferenceLinks); };
bool foundValueProperty = false;
this.ProcessProperty(
duplicatePropertyNamesChecker,
propertyAnnotationValueReader,
(propertyParseResult, propertyName) =>
{
switch (propertyParseResult)
{
case PropertyParsingResult.ODataInstanceAnnotation:
if (string.CompareOrdinal(ODataAnnotationNames.ODataNextLink, propertyName) == 0)
{
this.ReadEntityReferenceLinksNextLinkAnnotationValue(links);
}
else if (string.CompareOrdinal(ODataAnnotationNames.ODataCount, propertyName) == 0)
{
this.ReadEntityReferenceCountAnnotationValue(links);
}
else
{
throw new ODataException(ODataErrorStrings.ODataJsonLightPropertyAndValueDeserializer_UnexpectedAnnotationProperties(propertyName));
}
break;
case PropertyParsingResult.CustomInstanceAnnotation:
Debug.Assert(!string.IsNullOrEmpty(propertyName), "!string.IsNullOrEmpty(propertyName)");
this.AssertJsonCondition(JsonNodeType.PrimitiveValue, JsonNodeType.StartObject, JsonNodeType.StartArray);
ODataAnnotationNames.ValidateIsCustomAnnotationName(propertyName);
Debug.Assert(
!this.MessageReaderSettings.ShouldSkipAnnotation(propertyName),
"!this.MessageReaderSettings.ShouldReadAndValidateAnnotation(propertyName) -- otherwise we should have already skipped the custom annotation and won't see it here.");
object annotationValue = this.ReadCustomInstanceAnnotationValue(duplicatePropertyNamesChecker, propertyName);
links.InstanceAnnotations.Add(new ODataInstanceAnnotation(propertyName, annotationValue.ToODataValue()));
break;
case PropertyParsingResult.PropertyWithValue:
if (string.CompareOrdinal(JsonLightConstants.ODataValuePropertyName, propertyName) != 0)
{
// We did not find a supported link collection property; fail.
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_InvalidEntityReferenceLinksPropertyFound(propertyName, JsonLightConstants.ODataValuePropertyName));
}
// We found the link collection property and are done parsing property annotations;
foundValueProperty = true;
break;
case PropertyParsingResult.PropertyWithoutValue:
// If we find a property without a value it means that we did not find the entity reference links property (yet)
// but an invalid property annotation
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_InvalidPropertyAnnotationInEntityReferenceLinks(propertyName));
case PropertyParsingResult.EndOfObject:
break;
case PropertyParsingResult.MetadataReferenceProperty:
throw new ODataException(ODataErrorStrings.ODataJsonLightPropertyAndValueDeserializer_UnexpectedMetadataReferenceProperty(propertyName));
default:
throw new ODataException(ODataErrorStrings.General_InternalError(InternalErrorCodes.ODataJsonLightEntityReferenceLinkDeserializer_ReadEntityReferenceLinksAnnotations));
}
});
if (foundValueProperty)
{
return;
}
}
if (forLinksStart)
{
// We did not find the 'value' property.
throw new ODataException(ODataErrorStrings.ODataJsonLightEntityReferenceLinkDeserializer_ExpectedEntityReferenceLinksPropertyNotFound(JsonLightConstants.ODataValuePropertyName));
}
this.AssertJsonCondition(JsonNodeType.EndObject);
}