/// <summary>Applies the properties in the plain XML content to the specified resource.</summary>
/// <param name="item">item to read from.</param>
/// <param name='resourceType'>Type of resource whose values are being set.</param>
/// <param name="propertiesApplied">Properties that have been applied to the <paramref name="resource"/></param>
/// <param name='resource'>Target resource.</param>
private void ApplyProperties(SyndicationItem item, ResourceType resourceType, EpmContentDeSerializer.EpmAppliedPropertyInfo propertiesApplied, object resource)
{
Debug.Assert(item != null, "item != null");
Debug.Assert(resourceType != null, "resourceType != null");
Debug.Assert(propertiesApplied != null, "propertiesApplied != null");
Debug.Assert(resource != null, "resource != null");
using (XmlReader propertiesFromEntry = GetPropertiesReaderFromEntry(item))
using (XmlReader propertiesFromContent = GetPropertiesReaderFromContent(item))
{
XmlReader reader = null;
if (resourceType.IsMediaLinkEntry)
{
if (propertiesFromContent != null)
{
// The server is expecting a MLE payload, however we found a <m:properties> element under the <atom:content> element.
// The client must assumed the resource type is a non-MLE type and serialized as such.
//
// We must throw here otherwise the client would falsely assume all the properties are correctly deserialized on
// the server where as in fact the properties element is under the wrong node.
throw DataServiceException.CreateBadRequestError(Strings.DataServiceException_GeneralError);
}
reader = propertiesFromEntry;
}
else
{
if (propertiesFromEntry != null)
{
// The server is expecting a non-MLE payload, however we found a <m:properties> element under the <entry> element.
// The client must assumed the resource type is a MLE type and serialized as such.
//
// We must throw here otherwise the client would falsely assume all the properties are correctly deserialized on
// the server where as in fact the properties element is under the wrong node.
throw DataServiceException.CreateBadRequestError(Strings.DataServiceException_GeneralError);
}
reader = propertiesFromContent;
}
if (reader != null)
{
reader.ReadStartElement(XmlConstants.AtomPropertiesElementName, XmlConstants.DataWebMetadataNamespace);
PlainXmlDeserializer.ApplyContent(this, reader, resourceType, resource, propertiesApplied, this.MaxObjectCount);
}
}
}
/// <summary>Applies properties from the reader to the specified resource.</summary>
/// <param name="deserializer">Deserializer which is driving the <paramref name="reader"/>.</param>
/// <param name='reader'>XmlReader to read from.</param>
/// <param name='resourceType'>Type of resource.</param>
/// <param name='resource'>Resource to set value on.</param>
/// <param name="propertiesApplied">Properties already applied based on content</param>
/// <param name="currentObjectCount">current object count for this operation.</param>
/// <remarks>
/// This method will end as soon as it find something that is not an
/// XML element to process.
/// </remarks>
internal static void ApplyContent(Deserializer deserializer, XmlReader reader, ResourceType resourceType, object resource, EpmContentDeSerializer.EpmAppliedPropertyInfo propertiesApplied, int currentObjectCount)
{
Debug.Assert(deserializer != null, "deserializer != null");
Debug.Assert(reader != null, "reader != null");
using (PlainXmlDeserializer xml = new PlainXmlDeserializer(reader, deserializer, propertiesApplied))
{
// Initialize the new deserializer instance with the current object count
xml.UpdateObjectCount(currentObjectCount);
// load all the properties
xml.ApplyContent(xml.xmlReader, resourceType, resource);
// After all the properties have been loaded, initialize the current deserializer value with the object count
deserializer.UpdateObjectCount(xml.MaxObjectCount);
}
}
/// <summary>Applies properties from the reader to the specified resource.</summary>
/// <param name="deserializer">Deserializer which is driving the <paramref name="reader"/>.</param>
/// <param name='reader'>XmlReader to read from.</param>
/// <param name='resourceType'>Type of resource.</param>
/// <param name='resource'>Resource to set value on.</param>
/// <param name="propertiesApplied">Properties already applied based on content</param>
/// <param name="currentObjectCount">current object count for this operation.</param>
/// <remarks>
/// This method will end as soon as it find something that is not an
/// XML element to process.
/// </remarks>
internal static void ApplyContent(Deserializer deserializer, XmlReader reader, ResourceType resourceType, object resource, EpmContentDeSerializer.EpmAppliedPropertyInfo propertiesApplied, int currentObjectCount)
{
Debug.Assert(deserializer != null, "deserializer != null");
Debug.Assert(reader != null, "reader != null");
using (PlainXmlDeserializer xml = new PlainXmlDeserializer(reader, deserializer, propertiesApplied))
{
// Initialize the new deserializer instance with the current object count
xml.UpdateObjectCount(currentObjectCount);
// load all the properties
xml.ApplyContent(xml.xmlReader, resourceType, resource);
// After all the properties have been loaded, initialize the current deserializer value with the object count
deserializer.UpdateObjectCount(xml.MaxObjectCount);
}
}
/// <summary>Reads a typed property from the specified XmlReader.</summary>
/// <param name='reader'>XmlReader to read from.</param>
/// <param name='propertyName'>Name of property to read.</param>
/// <param name='resourceProperty'>resourceProperty whose value is to be read.</param>
/// <returns>The instance read, possibly null.</returns>
private object ReadPropertyWithType(XmlReader reader, string propertyName, ResourceProperty resourceProperty)
{
Debug.Assert(reader != null, "reader != null");
Debug.Assert(propertyName != null, "propertyName != null");
ResourceType propertyType = null;
// If this is a open property OR we do not have to do type conversion for primitive types,
// read the type from the payload.
bool readTypeFromWire =
resourceProperty == null ||
(!this.Service.Configuration.EnableTypeConversion && resourceProperty.ResourceType.ResourceTypeKind == ResourceTypeKind.Primitive);
if (readTypeFromWire)
{
propertyType = this.ReadOpenPropertyTypeAttribute(reader);
}
else
{
propertyType = resourceProperty.ResourceType;
}
if (this.propertiesApplied != null)
{
this.propertiesApplied.AddPropertyToTypeMapItem(
this.BuildPropertyPath(propertyName),
propertyType.FullName);
}
object propertyValue;
String appliedPropertyName = resourceProperty != null ? resourceProperty.Name : propertyName;
switch (propertyType.ResourceTypeKind)
{
case ResourceTypeKind.ComplexType:
this.CheckAndIncrementObjectCount();
bool isNull = HasNullAttributeWithTrueValue(reader);
if (this.propertiesApplied != null)
{
this.propertiesApplied.AddAppliedProperty(this.BuildPropertyPath(appliedPropertyName), isNull);
}
if (isNull)
{
propertyValue = null;
}
else
{
propertyValue = this.Updatable.CreateResource(null, propertyType.FullName);
if (!reader.IsEmptyElement)
{
// Step inside the complex type, apply its properties, and pop back out.
using (XmlReader propertyReader = reader.ReadSubtree())
{
if (!WebUtil.XmlReaderEnsureElement(propertyReader))
{
throw DataServiceException.CreateBadRequestError(
Strings.PlainXml_PropertyLacksElement(propertyName));
}
propertyReader.ReadStartElement();
String savedPath = this.currentPathPrefix;
this.currentPathPrefix = String.IsNullOrEmpty(this.currentPathPrefix) ? appliedPropertyName : this.currentPathPrefix + "/" + appliedPropertyName;
ApplyContent(propertyReader, propertyType, propertyValue);
this.currentPathPrefix = savedPath;
}
Debug.Assert(
reader.NodeType == XmlNodeType.EndElement,
"reader.NodeType == XmlNodeType.EndElement -- otherwise ReadSubtree left outer read in incorrect position.");
}
}
break;
case ResourceTypeKind.EntityType:
throw DataServiceException.CreateBadRequestError(
Strings.PlainXml_NavigationPropertyNotSupported(propertyName));
default:
Debug.Assert(
propertyType.ResourceTypeKind == ResourceTypeKind.Primitive,
"property.TypeKind == ResourceTypeKind.Primitive -- metadata shouldn't return " + propertyType.ResourceTypeKind);
propertyValue = ReadElementString(reader, propertyName);
// We need to convert the type to the wire type. Conversion to the property type happens in Deserializer.SetValue method.
if (readTypeFromWire)
{
propertyValue = PlainXmlDeserializer.ConvertValuesForXml(propertyValue, propertyName, propertyType.InstanceType);
}
if (this.propertiesApplied != null)
{
this.propertiesApplied.AddAppliedProperty(this.BuildPropertyPath(appliedPropertyName), false);
}
break;
}
return(propertyValue);
}
/// <summary>
/// Creates a new <see cref="Deserializer"/> for the specified stream.
/// </summary>
/// <param name="description">description about the request uri.</param>
/// <param name="dataService">Data service for which the deserializer will act.</param>
/// <param name="update">indicates whether this is a update operation or not</param>
/// <param name="tracker">Tracker to use for modifications.</param>
/// <returns>A new instance of <see cref="Deserializer"/>.</returns>
internal static Deserializer CreateDeserializer(RequestDescription description, IDataService dataService, bool update, UpdateTracker tracker)
{
string mimeType;
System.Text.Encoding encoding;
DataServiceHostWrapper host = dataService.OperationContext.Host;
HttpProcessUtility.ReadContentType(host.RequestContentType, out mimeType, out encoding);
ContentFormat requestFormat = WebUtil.SelectRequestFormat(mimeType, description);
Stream requestStream = host.RequestStream;
Debug.Assert(requestStream != null, "requestStream != null");
Debug.Assert(tracker != null, "Change tracker must always be created.");
Deserializer deserializer = null;
Debug.Assert(
(!update /*POST*/ && dataService.OperationContext.Host.AstoriaHttpVerb == AstoriaVerbs.POST) ||
(update /*PUT,MERGE*/ && (dataService.OperationContext.Host.AstoriaHttpVerb == AstoriaVerbs.MERGE || dataService.OperationContext.Host.AstoriaHttpVerb == AstoriaVerbs.PUT)),
"For PUT and MERGE, update must be true; for POST, update must be false");
switch (requestFormat)
{
case ContentFormat.Json:
deserializer = new JsonDeserializer(
requestStream,
encoding,
update,
dataService,
tracker);
break;
case ContentFormat.Atom:
SyndicationFormatterFactory factory = new Atom10FormatterFactory();
deserializer = new SyndicationDeserializer(
requestStream, // stream
encoding, // encoding
dataService, // dataService
update,
factory,
tracker); // factory
break;
case ContentFormat.PlainXml:
deserializer = new PlainXmlDeserializer(
requestStream,
encoding,
dataService,
update,
tracker);
break;
default:
throw new DataServiceException(415, Strings.BadRequest_UnsupportedRequestContentType(host.RequestContentType));
}
Debug.Assert(deserializer != null, "deserializer != null");
return deserializer;
}