protected void UpdateMediaItem <T>(MediaItem mediaItem, MediaItemAspectMetadata.SingleAttributeSpecification attribute, T value)
{
if (mediaItem == null)
{
return;
}
T oldValue;
if (MediaItemAspect.TryGetAttribute(mediaItem.Aspects, attribute, out oldValue))
{
if ((oldValue == null && value == null) || (oldValue != null && oldValue.Equals(value)))
{
return;
}
}
IContentDirectory cd = ServiceRegistration.Get <IServerConnectionManager>().ContentDirectory;
if (cd == null)
{
return;
}
var rl = mediaItem.GetResourceLocator();
List <Guid> parentDirectoryIds;
if (!MediaItemAspect.TryGetAttribute(mediaItem.Aspects, ProviderResourceAspect.ATTR_PARENT_DIRECTORY_ID, out parentDirectoryIds))
{
return;
}
MediaItemAspect.SetAttribute(mediaItem.Aspects, attribute, value);
cd.AddOrUpdateMediaItemAsync(parentDirectoryIds.First(), rl.NativeSystemId, rl.NativeResourcePath, MediaItemAspect.GetAspects(mediaItem.Aspects));
}
public static MediaItemAspectMetadata.AttributeSpecification GetAttributeSpecification(MediaItem mediaItem, IEnumerable <MediaItemAspectMetadata.SingleAttributeSpecification> attributes, out MediaItemAspect aspect)
{
SingleMediaItemAspect singleAspect = null;
MediaItemAspectMetadata.SingleAttributeSpecification attr = attributes.FirstOrDefault(a => MediaItemAspect.TryGetAspect(mediaItem.Aspects, a.ParentMIAM, out singleAspect));
aspect = singleAspect;
return(attr);
}
public static object GetAttributeValue(this MediaItem mediaItem, MediaItemAspectMetadata.SingleAttributeSpecification attribute)
{
object value = null;
if (!MediaItemAspect.TryGetAttribute(mediaItem.Aspects, attribute, out value))
{
return(null);
}
return(value);
}
public void TestSingleMIAM()
{
SingleTestMIA src = TestCommonUtils.CreateSingleMIA("Single", Cardinality.Inline, true, false);
TextWriter writer = new StringWriter();
XmlWriter serialiser = new XmlTextWriter(writer);
serialiser.WriteStartElement("Test"); // Wrapper around the albums
src.Metadata.Serialize(serialiser);
serialiser.WriteEndElement();
Console.WriteLine("XML: {0}", writer);
XmlReader reader = XmlReader.Create(new StringReader(writer.ToString()));
reader.Read(); // Test tag
reader.Read(); // MIAM tag
SingleMediaItemAspectMetadata dest = MediaItemAspectMetadata.Deserialize(reader) as SingleMediaItemAspectMetadata;
Assert.IsNotNull(dest);
Assert.AreEqual(src.Metadata.AspectId, dest.AspectId);
Assert.AreEqual(src.Metadata.AttributeSpecifications.Count, dest.AttributeSpecifications.Count);
MediaItemAspectMetadata.SingleAttributeSpecification srcSpec = src.Metadata.AttributeSpecifications[src.ATTR_STRING.AttributeName] as MediaItemAspectMetadata.SingleAttributeSpecification;
Assert.IsNotNull(srcSpec);
MediaItemAspectMetadata.SingleAttributeSpecification destSpec = dest.AttributeSpecifications[src.ATTR_STRING.AttributeName] as MediaItemAspectMetadata.SingleAttributeSpecification;
Assert.IsNotNull(destSpec);
Assert.AreEqual(srcSpec.AttributeName, destSpec.AttributeName);
Assert.AreEqual(srcSpec.AttributeType, destSpec.AttributeType);
Assert.AreEqual(srcSpec.Cardinality, destSpec.Cardinality);
Assert.AreEqual(srcSpec.IsCollectionAttribute, destSpec.IsCollectionAttribute);
Assert.AreEqual(srcSpec.IsIndexed, destSpec.IsIndexed);
Assert.AreEqual(srcSpec.MaxNumChars, destSpec.MaxNumChars);
}
protected AbstractSortByFirstComparableAttribute(MediaItemAspectMetadata.SingleAttributeSpecification attr)
{
_attrs = new[] { attr };
}
protected AbstractSortByComparableValueAttribute(string displayName, string groupByDisplayName, MediaItemAspectMetadata.SingleAttributeSpecification sortAttr)
: this(displayName, groupByDisplayName, new[] { sortAttr })
{
}
public static IEnumerable <T> GetCollectionAttributeValues <T>(this MediaItem mediaItem, MediaItemAspectMetadata.SingleAttributeSpecification attribute)
{
IEnumerable <T> value = null;
if (!MediaItemAspect.TryGetAttribute(mediaItem.Aspects, attribute, out value))
{
return(null);
}
return(value);
}
