/// <summary>
/// Validates that a string is either a valid absolute URI, or (if it begins with '#') it is a valid URI fragment.
/// </summary>
/// <param name="metadataDocumentUri">The metadata document uri.</param>
/// <param name="propertyName">The property name to validate.</param>
internal static void ValidateMetadataReferencePropertyName(Uri metadataDocumentUri, string propertyName)
{
Debug.Assert(metadataDocumentUri != null, "metadataDocumentUri != null");
Debug.Assert(metadataDocumentUri.IsAbsoluteUri, "metadataDocumentUri.IsAbsoluteUri");
Debug.Assert(!String.IsNullOrEmpty(propertyName), "!string.IsNullOrEmpty(propertyName)");
string uriStringToValidate = propertyName;
// If it starts with a '#', validate that the rest of the string is a valid Uri fragment.
if (propertyName[0] == ODataConstants.ContextUriFragmentIndicator)
{
// In order to use System.Uri to validate a fragement, we first prepend the metadataDocumentUri
// so that it becomes an absolute URI which we can validate with Uri.IsWellFormedUriString.
uriStringToValidate = UriUtils.UriToString(metadataDocumentUri) + UriUtils.EnsureEscapedFragment(propertyName);
}
if (!Uri.IsWellFormedUriString(uriStringToValidate, UriKind.Absolute) ||
!ODataJsonLightUtils.IsMetadataReferenceProperty(propertyName) ||
propertyName[propertyName.Length - 1] == ODataConstants.ContextUriFragmentIndicator)
{
throw new ODataException(Strings.ValidationUtils_InvalidMetadataReferenceProperty(propertyName));
}
if (IsOpenMetadataReferencePropertyName(metadataDocumentUri, propertyName))
{
throw new ODataException(Strings.ODataJsonLightValidationUtils_OpenMetadataReferencePropertyNotSupported(propertyName, UriUtils.UriToString(metadataDocumentUri)));
}
}
/// <summary>
/// Determines if the specified property name is a name of an open metadata reference property.
/// </summary>
/// <param name="metadataDocumentUri">The metadata document uri.</param>
/// <param name="propertyName">The property name in question.</param>
/// <returns>true if the specified property name is a name of an open metadata reference property; false otherwise.</returns>
internal static bool IsOpenMetadataReferencePropertyName(Uri metadataDocumentUri, string propertyName)
{
Debug.Assert(metadataDocumentUri != null, "metadataDocumentUri != null");
Debug.Assert(metadataDocumentUri.IsAbsoluteUri, "metadataDocumentUri.IsAbsoluteUri");
Debug.Assert(!String.IsNullOrEmpty(propertyName), "!string.IsNullOrEmpty(propertyName)");
// If a metadata reference property isn't based off of the known metadata document URI (for example, it points to a model on another server),
// then it must be open. It is based off the known metadata document URI if it either is a fragment (i.e., starts with a hash) or starts with the known absolute URI.
return(ODataJsonLightUtils.IsMetadataReferenceProperty(propertyName) &&
propertyName[0] != ODataConstants.ContextUriFragmentIndicator &&
!propertyName.StartsWith(UriUtils.UriToString(metadataDocumentUri), StringComparison.OrdinalIgnoreCase));
}
/// <summary>
/// Reads a property name from the JSON reader and determines if it's a regular property, an instance annotation or a property annotation.
/// </summary>
/// <param name="propertyName">The name of the regular property which the reader is positioned on or which a property annotation belongs to.</param>
/// <param name="annotationName">The name of the instance or property annotation, or null if the reader is on a regular property.</param>
private void ReadPropertyName(out string propertyName, out string annotationName)
{
string jsonPropertyName = this.GetPropertyName();
Debug.Assert(!string.IsNullOrEmpty(jsonPropertyName), "The JSON reader guarantees that property names are not null or empty.");
this.ReadInternal();
if (jsonPropertyName.StartsWith("@", StringComparison.Ordinal))
{
// Instance-level annotation for the instance itself; not property name.
propertyName = null;
annotationName = jsonPropertyName.Substring(1);
}
else
{
int separatorIndex = jsonPropertyName.IndexOf(JsonLightConstants.ODataPropertyAnnotationSeparatorChar);
if (separatorIndex > 0)
{
// This is a property annotation; compute the property and annotation names
propertyName = jsonPropertyName.Substring(0, separatorIndex);
annotationName = jsonPropertyName.Substring(separatorIndex + 1);
}
else
{
// This is either a regular data property or an instance-level annotation
int dotIndex = jsonPropertyName.IndexOf('.');
if (dotIndex < 0)
{
// Regular property
propertyName = jsonPropertyName;
annotationName = null;
}
else
{
if (ODataJsonLightUtils.IsMetadataReferenceProperty(jsonPropertyName))
{
// Metadata reference property
propertyName = null;
annotationName = jsonPropertyName;
}
else
{
// unexpected instance annotation name
throw new ODataException(Microsoft.OData.Core.Strings.JsonReaderExtensions_UnexpectedInstanceAnnotationName(jsonPropertyName));
}
}
}
}
}
/// <summary>
/// Gets the metadata reference fragment from the operation context uri.
/// i.e. if the operation context uri is {absolute metadata document uri}#{container-qualified-operation-name},
/// this method will return #{container-qualified-operation-name}.
/// </summary>
/// <param name="operation">Operation in question.</param>
/// <returns>The metadata reference fragment from the operation context uri.</returns>
private string GetOperationMetadataString(ODataOperation operation)
{
Debug.Assert(operation != null && operation.Metadata != null, "operation != null && operation.Metadata != null");
string operationMetadataString = UriUtils.UriToString(operation.Metadata);
Debug.Assert(ODataJsonLightUtils.IsMetadataReferenceProperty(operationMetadataString), "ODataJsonLightUtils.IsMetadataReferenceProperty(operationMetadataString)");
// If we don't have a metadata document URI (which is the case with nometadata mode), just write the string form of the Uri we were given.
if (this.MetadataDocumentBaseUri == null)
{
return(operation.Metadata.Fragment);
}
Debug.Assert(
!ODataJsonLightValidationUtils.IsOpenMetadataReferencePropertyName(this.MetadataDocumentBaseUri, operationMetadataString),
"Open metadata reference property is not supported, we should have thrown before this point.");
return(ODataConstants.ContextUriFragmentIndicator + ODataJsonLightUtils.GetUriFragmentFromMetadataReferencePropertyName(this.MetadataDocumentBaseUri, operationMetadataString));
}
/// <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);
bool isInstanceAnnotation = false;
if (!isPropertyAnnotation)
{
isInstanceAnnotation = IsInstanceAnnotation(nameFromReader);
propertyNameFromReader = isInstanceAnnotation ? 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(OData.Core.Strings.ODataJsonLightDeserializer_AnnotationTargetingInstanceAnnotationWithoutValue(lastPropertyAnnotationNameFound, parsedPropertyName));
}
return(PropertyParsingResult.PropertyWithoutValue);
}
if (isPropertyAnnotation)
{
// 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))
{
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))
{
continue;
}
// We are encountering the property name for the first time.
// Read over the property name.
this.JsonReader.Read();
parsedPropertyName = propertyNameFromReader;
if (!isInstanceAnnotation && ODataJsonLightUtils.IsMetadataReferenceProperty(propertyNameFromReader))
{
return(PropertyParsingResult.MetadataReferenceProperty);
}
if (!isInstanceAnnotation && !ODataJsonLightReaderUtils.IsAnnotationProperty(propertyNameFromReader))
{
// Normal property
return(PropertyParsingResult.PropertyWithValue);
}
// 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(OData.Core.Strings.ODataJsonLightDeserializer_AnnotationTargetingInstanceAnnotationWithoutValue(lastPropertyAnnotationNameFound, parsedPropertyName));
}
return(PropertyParsingResult.PropertyWithoutValue);
}
return(PropertyParsingResult.EndOfObject);
}