/// <summary>
/// Convenience method to set a simple attribute in a dictionary of media item aspects. If the given <paramref name="aspectData"/>
/// dictionary contains the media item aspect of the requested aspect type, that aspect instance is used to store the
/// attribute corresponding to the given <paramref name="attributeSpecification"/>. If the corresponding aspect instance is not
/// present in the dictionary yet, it is created and added to the dictionary before setting the value.
/// </summary>
/// <typeparam name="TE">Type parameter.</typeparam>
/// <param name="aspectData">Dictionary of aspect data to be written to.</param>
/// <param name="attributeSpecification">Type of the attribute to write.</param>
/// <param name="value">Value to be set.</param>
public static void SetAttribute <TE>(IDictionary <Guid, MediaItemAspect> aspectData,
MediaItemAspectMetadata.AttributeSpecification attributeSpecification, TE value)
{
MediaItemAspect aspect = GetOrCreateAspect(aspectData, attributeSpecification.ParentMIAM);
aspect.SetAttribute(attributeSpecification, value);
}
public static MediaItemAspect Deserialize(XmlReader reader)
{
if (!reader.MoveToAttribute("Id"))
{
throw new ArgumentException("Media item aspect cannot be deserialized: 'Id' attribute missing");
}
Guid aspectTypeId = new Guid(reader.ReadContentAsString());
reader.MoveToElement();
IMediaItemAspectTypeRegistration miatr = ServiceRegistration.Get <IMediaItemAspectTypeRegistration>();
MediaItemAspectMetadata miaType;
if (!miatr.LocallyKnownMediaItemAspectTypes.TryGetValue(aspectTypeId, out miaType))
{
throw new ArgumentException(string.Format("Media item aspect cannot be deserialized: Unknown media item aspect type '{0}'",
aspectTypeId));
}
MediaItemAspect result = new MediaItemAspect(miaType);
if (SoapHelper.ReadEmptyStartElement(reader, "Aspect"))
{
return(result);
}
while (reader.NodeType != XmlNodeType.EndElement)
{
if (!reader.MoveToAttribute("Name"))
{
throw new ArgumentException("Media item aspect attribute cannot be deserialized: 'Name' attribute missing");
}
String attributeName = reader.ReadContentAsString();
reader.MoveToElement();
if (SoapHelper.ReadEmptyStartElement(reader, "Attr"))
{
continue;
}
MediaItemAspectMetadata.AttributeSpecification attributeSpec;
if (!miaType.AttributeSpecifications.TryGetValue(attributeName, out attributeSpec))
{
throw new ArgumentException(string.Format(
"Media item aspect attribute cannot be deserialized: Unknown attribute specification '{0}'", attributeName));
}
if (attributeSpec.IsCollectionAttribute)
{
IList valuesCollection = attributeSpec.CreateValuesCollection();
while (reader.NodeType != XmlNodeType.EndElement)
{
valuesCollection.Add(DeserializeValue(reader, attributeSpec.AttributeType));
}
result.SetCollectionAttribute(attributeSpec, valuesCollection);
}
else
{
result.SetAttribute(attributeSpec, DeserializeValue(reader, attributeSpec.AttributeType));
}
reader.ReadEndElement(); // Attr
}
reader.ReadEndElement(); // Aspect
return(result);
}