/// <summary>Writes all the properties of the specified resource or complex object.</summary>
/// <param name="expanded">Expanded properties for the result.</param>
/// <param name="customObject">Resource or complex object with properties to write out.</param>
/// <param name="resourceType">resourceType containing metadata about the current custom object</param>
/// <param name="absoluteUri">absolute uri for the given resource</param>
/// <param name="relativeUri">relative uri for the given resource</param>
/// <param name="item">Item in which to place links / expansions.</param>
/// <param name="content">Content in which to place values.</param>
/// <param name="currentSourceRoot">Epm source sub-tree corresponding to <paramref name="customObject"/></param>
private void WriteObjectProperties(IExpandedResult expanded, object customObject, ResourceType resourceType, Uri absoluteUri, string relativeUri, SyndicationItem item, DictionaryContent content, EpmSourcePathSegment currentSourceRoot)
{
Debug.Assert(customObject != null, "customObject != null");
Debug.Assert(resourceType != null, "resourceType != null");
Debug.Assert(!String.IsNullOrEmpty(relativeUri), "!String.IsNullOrEmpty(relativeUri)");
if (absoluteUri == null && resourceType.ResourceTypeKind == ResourceTypeKind.EntityType)
{
// entity type should have an URI, complex type should not have an URI
// If the static type of the object is "Object", we will mistreat an entity type as complex type and hit this situation
throw new DataServiceException(500, Strings.BadProvider_InconsistentEntityOrComplexTypeUsage(resourceType.Name));
}
this.RecurseEnter();
try
{
List<ResourcePropertyInfo> navProperties = null;
IEnumerable<ProjectionNode> projectionNodes = null;
if (resourceType.ResourceTypeKind == ResourceTypeKind.EntityType)
{
Debug.Assert(this.CurrentContainer != null, "this.CurrentContainer != null");
if (this.Provider.IsEntityTypeDisallowedForSet(this.CurrentContainer, resourceType))
{
throw new InvalidOperationException(Strings.BaseServiceProvider_NavigationPropertiesOnDerivedEntityTypesNotSupported(resourceType.FullName, this.CurrentContainer.Name));
}
navProperties = new List<ResourcePropertyInfo>(resourceType.Properties.Count);
projectionNodes = this.GetProjections();
}
if (projectionNodes == null)
{
var action = resourceType.DictionarySerializerDelegate;
if (action == null && this.Provider.IsV1Provider)
{
Module module = typeof(SyndicationSerializer).Module;
Type customObjectType = customObject.GetType();
Type[] parameterTypes = new Type[] { typeof(object), typeof(DictionaryContent) };
DynamicMethod method = new DynamicMethod("content_populator", typeof(void), parameterTypes, module, false /* skipVisibility */);
ILGenerator generator = method.GetILGenerator();
MethodInfo methodWritePrimitiveValue = typeof(SyndicationSerializer).GetMethod("WritePrimitiveValue", BindingFlags.Static | BindingFlags.NonPublic);
// Downcast the argument.
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Castclass, customObjectType);
foreach (ResourceProperty property in resourceType.Properties.Where(p => p.TypeKind == ResourceTypeKind.Primitive))
{
if (SyndicationSerializer.EpmNeedToSkip(currentSourceRoot, property.Name))
{
continue;
}
// WritePrimitiveValue(propertyValue, property.Name, property.ResourceType, content);
generator.Emit(OpCodes.Dup);
generator.Emit(OpCodes.Call, resourceType.GetPropertyInfo(property).GetGetMethod());
if (property.Type.IsValueType)
{
generator.Emit(OpCodes.Box, property.Type);
}
generator.Emit(OpCodes.Ldstr, property.Name);
generator.Emit(OpCodes.Ldstr, property.ResourceType.FullName);
generator.Emit(OpCodes.Ldarg_1);
generator.Emit(OpCodes.Call, methodWritePrimitiveValue);
}
generator.Emit(OpCodes.Pop);
generator.Emit(OpCodes.Ret);
action = (Action<object, DictionaryContent>)method.CreateDelegate(typeof(Action<object, DictionaryContent>), null);
resourceType.DictionarySerializerDelegate = action;
}
if (action != null)
{
action(customObject, content);
}
else
{
foreach (ResourceProperty property in resourceType.Properties.Where(p => p.TypeKind == ResourceTypeKind.Primitive))
{
object propertyValue = WebUtil.GetPropertyValue(this.Provider, customObject, resourceType, property, null);
if (SyndicationSerializer.EpmNeedToSkip(currentSourceRoot, property.Name))
{
continue;
}
WritePrimitiveValue(propertyValue, property.Name, property.ResourceType.FullName, content);
}
}
foreach (ResourceProperty property in this.Provider.GetResourceProperties(this.CurrentContainer, resourceType))
{
string propertyName = property.Name;
if (property.TypeKind == ResourceTypeKind.EntityType)
{
Debug.Assert(navProperties != null, "navProperties list must be assigned for entity types");
object propertyValue =
(this.ShouldExpandSegment(property.Name)) ? GetExpandedProperty(this.Provider, expanded, customObject, property) : null;
navProperties.Add(new ResourcePropertyInfo(property, propertyValue));
}
else
{
if (property.TypeKind == ResourceTypeKind.ComplexType)
{
object propertyValue = WebUtil.GetPropertyValue(this.Provider, customObject, resourceType, property, null);
bool needPop = this.PushSegmentForProperty(property);
this.WriteComplexObjectValue(
propertyValue,
propertyName,
property.ResourceType,
relativeUri + "/" + property.Name,
content,
SyndicationSerializer.EpmGetComplexPropertySegment(currentSourceRoot, property.Name));
this.PopSegmentName(needPop);
}
}
}
if (resourceType.IsOpenType)
{
IEnumerable<KeyValuePair<string, object>> properties = this.Provider.GetOpenPropertyValues(customObject);
foreach (KeyValuePair<string, object> property in properties)
{
string propertyName = property.Key;
if (String.IsNullOrEmpty(propertyName))
{
throw new DataServiceException(500, Strings.Syndication_InvalidOpenPropertyName(resourceType.FullName));
}
Type valueType;
ResourceType propertyResourceType;
object value = property.Value;
if (value == null || value == DBNull.Value)
{
valueType = typeof(string);
propertyResourceType = ResourceType.PrimitiveStringResourceType;
}
else
{
valueType = value.GetType();
propertyResourceType = WebUtil.GetResourceType(this.Provider, value);
}
// A null ResourceType indicates a ----ed type (eg, IntPtr or DateTimeOffset). So ignore it.
if (propertyResourceType == null)
{
throw new DataServiceException(500, Strings.Syndication_InvalidOpenPropertyType(propertyName));
}
if (propertyResourceType.ResourceTypeKind == ResourceTypeKind.Primitive)
{
if (value != null && SyndicationSerializer.EpmNeedToSkip(currentSourceRoot, propertyName))
{
continue;
}
WritePrimitiveValue(value, propertyName, propertyResourceType.FullName, content);
}
else
{
if (propertyResourceType.ResourceTypeKind == ResourceTypeKind.ComplexType)
{
Debug.Assert(propertyResourceType.InstanceType == valueType, "propertyResourceType.Type == valueType");
this.WriteComplexObjectValue(
value,
propertyName,
propertyResourceType,
relativeUri + "/" + propertyName,
content,
SyndicationSerializer.EpmGetComplexPropertySegment(currentSourceRoot, propertyName));
}
else
{
Debug.Assert(
propertyResourceType.ResourceTypeKind == ResourceTypeKind.EntityType,
"propertyResourceType.ResourceTypeKind == ResourceTypeKind.EntityType -- otherwise should have been processed as primitve or complex type.");
// Open navigation properties are not supported on OpenTypes
throw DataServiceException.CreateBadRequestError(Strings.OpenNavigationPropertiesNotSupportedOnOpenTypes(propertyName));
}
}
}
}
}
else
{
foreach (ProjectionNode projectionNode in projectionNodes)
{
string propertyName = projectionNode.PropertyName;
ResourceProperty property = resourceType.TryResolvePropertyName(propertyName);
// First solve the normal entity type property - turn it into a nav. property record
if (property != null && property.TypeKind == ResourceTypeKind.EntityType)
{
Debug.Assert(navProperties != null, "navProperties list must be assigned for entity types");
// By calling the GetResourceProperties we will use the cached list of properties
// for the given type and set. But we have to search through it.
// We could use the GetContainer (since that's what the GetResourceProperties does) and check
// if it returns null, but result of that is only partially cached so it might be expensive
// to evaluate for each item in the feed.
if (this.Provider.GetResourceProperties(this.CurrentContainer, resourceType).Contains(property))
{
object expandedPropertyValue =
(this.ShouldExpandSegment(propertyName)) ? GetExpandedProperty(this.Provider, expanded, customObject, property) : null;
navProperties.Add(new ResourcePropertyInfo(property, expandedPropertyValue));
}
continue;
}
// Now get the property value
object propertyValue = WebUtil.GetPropertyValue(this.Provider, customObject, resourceType, property, property == null ? propertyName : null);
// Determine the type of the property
ResourceType propertyResourceType;
if (property != null)
{
propertyResourceType = property.ResourceType;
}
else
{
if (propertyValue == null || propertyValue == DBNull.Value)
{
propertyResourceType = ResourceType.PrimitiveStringResourceType;
}
else
{
propertyResourceType = WebUtil.GetResourceType(this.Provider, propertyValue);
// A null ResourceType indicates a ----ed type (eg, IntPtr or DateTimeOffset). So ignore it.
if (propertyResourceType == null)
{
throw new DataServiceException(500, Strings.Syndication_InvalidOpenPropertyType(propertyName));
}
}
}
// And write out the value (depending on the type of the property)
if (propertyResourceType.ResourceTypeKind == ResourceTypeKind.Primitive)
{
if (propertyValue == DBNull.Value)
{
propertyValue = null;
}
if (propertyValue != null && SyndicationSerializer.EpmNeedToSkip(currentSourceRoot, propertyName))
{
continue;
}
WritePrimitiveValue(propertyValue, propertyName, propertyResourceType.FullName, content);
}
else if (propertyResourceType.ResourceTypeKind == ResourceTypeKind.ComplexType)
{
bool needPop = false;
if (property != null)
{
needPop = this.PushSegmentForProperty(property);
}
this.WriteComplexObjectValue(
propertyValue,
propertyName,
propertyResourceType,
relativeUri + "/" + propertyName,
content,
SyndicationSerializer.EpmGetComplexPropertySegment(currentSourceRoot, propertyName));
if (property != null)
{
this.PopSegmentName(needPop);
}
}
else
{
Debug.Assert(
propertyResourceType.ResourceTypeKind == ResourceTypeKind.EntityType,
"propertyResourceType.ResourceTypeKind == ResourceTypeKind.EntityType -- otherwise should have been processed as primitve or complex type.");
// Open navigation properties are not supported on OpenTypes
throw DataServiceException.CreateBadRequestError(Strings.OpenNavigationPropertiesNotSupportedOnOpenTypes(propertyName));
}
}
}
if (resourceType.ResourceTypeKind == ResourceTypeKind.EntityType)
{
for (int i = 0; i < navProperties.Count; i++)
{
ResourcePropertyInfo propertyInfo = navProperties[i];
ResourceProperty navProperty = propertyInfo.Property;
Debug.Assert(
navProperty.IsOfKind(ResourcePropertyKind.ResourceReference) ||
navProperty.IsOfKind(ResourcePropertyKind.ResourceSetReference),
"this must be nav property");
// Generate a link - see http://tools.ietf.org/html/rfc4287#section-4.2.7
string linkType = navProperty.IsOfKind(ResourcePropertyKind.ResourceReference) ? XmlConstants.AtomEntryElementName : XmlConstants.AtomFeedElementName;
linkType = String.Format(CultureInfo.InvariantCulture, "{0};{1}={2}", XmlConstants.MimeApplicationAtom, XmlConstants.AtomTypeAttributeName, linkType);
string segmentIdentifier = navProperty.Name;
if (!this.ShouldExpandSegment(navProperty.Name))
{
WriteDeferredContentElement(
XmlConstants.DataWebRelatedNamespace + navProperty.Name,
navProperty.Name,
relativeUri + "/" + segmentIdentifier,
linkType,
item);
}
else
{
object propertyValue = propertyInfo.Value;
IExpandedResult expandedResultPropertyValue = propertyValue as IExpandedResult;
object expandedPropertyValue =
expandedResultPropertyValue != null ?
GetExpandedElement(expandedResultPropertyValue) :
propertyValue;
string propertyRelativeUri = relativeUri + "/" + segmentIdentifier;
Uri propertyAbsoluteUri = RequestUriProcessor.AppendUnescapedSegment(absoluteUri, segmentIdentifier);
SyndicationLink link = new SyndicationLink();
link.RelationshipType = XmlConstants.DataWebRelatedNamespace + navProperty.Name;
link.Title = navProperty.Name;
link.Uri = new Uri(propertyRelativeUri, UriKind.RelativeOrAbsolute);
link.MediaType = linkType;
item.Links.Add(link);
bool needPop = this.PushSegmentForProperty(navProperty);
// if this.CurrentContainer is null, the target set of the navigation property is hidden.
if (this.CurrentContainer != null)
{
if (navProperty.IsOfKind(ResourcePropertyKind.ResourceSetReference))
{
IEnumerable enumerable;
bool collection = WebUtil.IsElementIEnumerable(expandedPropertyValue, out enumerable);
Debug.Assert(collection, "metadata loading must have ensured that navigation set properties must implement IEnumerable");
SyndicationFeed feed = new SyndicationFeed();
InlineAtomFeed inlineFeedExtension = new InlineAtomFeed(feed, this.factory);
link.ElementExtensions.Add(inlineFeedExtension);
IEnumerator enumerator = enumerable.GetEnumerator();
try
{
bool hasMoved = enumerator.MoveNext();
this.WriteFeedElements(
propertyValue as IExpandedResult,
enumerator,
navProperty.ResourceType,
navProperty.Name,
propertyAbsoluteUri,
propertyRelativeUri,
hasMoved,
feed,
true);
}
catch
{
WebUtil.Dispose(enumerator);
throw;
}
}
else
{
SyndicationItem inlineItem = new SyndicationItem();
this.WriteEntryElement(propertyValue as IExpandedResult, expandedPropertyValue, navProperty.ResourceType, propertyAbsoluteUri, propertyRelativeUri, inlineItem);
InlineAtomItem inlineItemExtension = new InlineAtomItem(inlineItem, this.factory);
link.ElementExtensions.Add(inlineItemExtension);
}
}
this.PopSegmentName(needPop);
}
}
}
}
finally
{
// The matching call to RecurseLeave is in a try/finally block not because it's necessary in the
// presence of an exception (progress will halt anyway), but because it's easier to maintain in the
// code in the presence of multiple exit points (returns).
this.RecurseLeave();
}
}
/// <summary>
/// Creates an expression to access a property.
/// </summary>
/// <param name="source">The source expression which evaluates to the instance to access the property on.</param>
/// <param name="sourceResourceType">The resource type of the source expression.</param>
/// <param name="resourceProperty">The resource property to access.</param>
/// <returns>An expression which evaluates to the property value.</returns>
private static Expression CreatePropertyAccessExpression(Expression source, ResourceType sourceResourceType, ResourceProperty resourceProperty)
{
Debug.Assert(source != null, "source != null");
Debug.Assert(sourceResourceType != null, "sourceResourceType != null");
Debug.Assert(resourceProperty != null, "resourceProperty != null");
Debug.Assert(sourceResourceType.Properties.Contains(resourceProperty), "resourceProperty is not declared on sourceResourceType");
#if DEBUG
Debug.Assert(TypeUtils.AreTypesEquivalent(source.Type, sourceResourceType.InstanceType), "source.Type != sourceResourceType.InstanceType");
#endif
// TODO: Deal with null propagation???
if (resourceProperty.CanReflectOnInstanceTypeProperty)
{
return Expression.Property(source, sourceResourceType.GetPropertyInfo(resourceProperty));
}
else
{
// TODO: Support for untyped and open properties
throw new NotImplementedException();
}
}
