/// <summary>
/// Convenience method to set a collection attribute in a dictionary of media item aspectData. 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>
/// <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 SetCollectionAttribute <T>(IDictionary <Guid, IList <MediaItemAspect> > aspectData,
MediaItemAspectMetadata.SingleAttributeSpecification attributeSpecification, IEnumerable <T> value)
{
SingleMediaItemAspect aspect = GetOrCreateAspect(aspectData, attributeSpecification.ParentMIAM);
aspect.SetCollectionAttribute(attributeSpecification, value);
}
public RelationshipType(string name, bool isPrimaryParent,
Guid childRole, Guid parentRole,
Guid childAspectId, Guid parentAspectId,
MediaItemAspectMetadata.AttributeSpecification childCountAttribute, MediaItemAspectMetadata.SingleAttributeSpecification parentCountAttribute,
bool updatePlayPercentage)
{
Name = name;
IsPrimaryParent = isPrimaryParent;
ChildAspectId = childAspectId;
ParentAspectId = parentAspectId;
ChildRole = childRole;
ParentRole = parentRole;
ChildCountAttribute = childCountAttribute;
ParentCountAttribute = parentCountAttribute;
UpdatePlayPercentage = updatePlayPercentage;
}
/// <summary>
/// Convenience method to get a simple attribute in a dictionary of media item aspectData.
/// </summary>
/// <typeparam name="TE">Type parameter.</typeparam>
/// <param name="aspectData">Dictionary of aspect data to be read from.</param>
/// <param name="attributeSpecification">Type of the attribute to read.</param>
/// <param name="defaultValue">If the attribute is {null} this value will be returned.</param>
/// <param name="value">Returns the value.</param>
/// <returns><c>true</c> if value exists or a null value was substituted by <paramref name="defaultValue"/>.</returns>
public static bool TryGetAttribute <TE>(IDictionary <Guid, IList <MediaItemAspect> > aspectData,
MediaItemAspectMetadata.SingleAttributeSpecification attributeSpecification, TE defaultValue, out TE value)
{
value = default(TE);
SingleMediaItemAspect mediaAspect;
SingleMediaItemAspectMetadata metadata = attributeSpecification.ParentMIAM;
if (!TryGetAspect(aspectData, metadata, out mediaAspect))
{
return(false);
}
object attribute = mediaAspect[attributeSpecification] ?? defaultValue;
value = (TE)attribute;
return(true);
}
