public bool Convert(IDataDescriptor[] values, Type targetType, object parameter, out object result)
{
result = null;
if (values.Length < 2)
{
return(false);
}
MediaItem mi = values[0].Value as MediaItem;
if (mi == null)
{
return(true);
}
MediaItemAspectMetadata.MultipleAttributeSpecification mas = values[1].Value as MediaItemAspectMetadata.MultipleAttributeSpecification;
if (mas == null)
{
return(true);
}
List <object> attributes;
if (!MediaItemAspect.TryGetAttribute(mi.Aspects, mas, out attributes) || attributes.Count == 0)
{
return(true);
}
string separator = parameter as string;
if (string.IsNullOrEmpty(separator))
{
separator = DEFAULT_SEPARATOR;
}
bool first = true;
StringBuilder sb = new StringBuilder();
foreach (object attribute in attributes)
{
if (attribute == null)
{
continue;
}
string attributeString = attribute.ToString();
if (!string.IsNullOrEmpty(attributeString))
{
if (first)
{
first = false;
}
else
{
sb.Append(separator);
}
sb.Append(attributeString);
}
}
result = sb.ToString();
return(true);
}
public static MediaItemAspectMetadata.AttributeSpecification GetAttributeSpecification(MediaItem mediaItem, IEnumerable <MediaItemAspectMetadata.MultipleAttributeSpecification> attributes, out MediaItemAspect aspect)
{
IList <MultipleMediaItemAspect> multipleAspects = null;
MediaItemAspectMetadata.MultipleAttributeSpecification attr = attributes.FirstOrDefault(a => MediaItemAspect.TryGetAspects(mediaItem.Aspects, a.ParentMIAM, out multipleAspects));
aspect = attr != null ? multipleAspects[0] : null;
return(attr);
}
private void AssertMultipleMIAMSpec(ICollection <MediaItemAspectMetadata.AttributeSpecification> src, ICollection <MediaItemAspectMetadata.AttributeSpecification> dest, MediaItemAspectMetadata.MultipleAttributeSpecification attr)
{
MediaItemAspectMetadata.MultipleAttributeSpecification srcSpec = src.FirstOrDefault(x => x.AttributeName == attr.AttributeName) as MediaItemAspectMetadata.MultipleAttributeSpecification;
Assert.IsNotNull(srcSpec, "Source spec");
MediaItemAspectMetadata.MultipleAttributeSpecification destSpec = dest.FirstOrDefault(x => x.AttributeName == attr.AttributeName) as MediaItemAspectMetadata.MultipleAttributeSpecification;
Assert.IsNotNull(destSpec, "Dest spec");
Assert.AreEqual(srcSpec.AttributeName, destSpec.AttributeName, "Attribute name");
Assert.AreEqual(srcSpec.AttributeType, destSpec.AttributeType, "Attribute type");
Assert.AreEqual(srcSpec.Cardinality, destSpec.Cardinality, "Attribute cardinality");
Assert.AreEqual(srcSpec.IsCollectionAttribute, destSpec.IsCollectionAttribute, "Attribute collection attribute");
Assert.AreEqual(srcSpec.IsIndexed, destSpec.IsIndexed, "Attribute indexed");
Assert.AreEqual(srcSpec.MaxNumChars, destSpec.MaxNumChars, "Attribute max characters");
}
public static object GetAttributeValue(this MediaItem mediaItem, MediaItemAspectMetadata.MultipleAttributeSpecification attribute)
{
List <object> values = null;
if (!MediaItemAspect.TryGetAttribute(mediaItem.Aspects, attribute, out values))
{
return(null);
}
if (values.Count == 0)
{
return(null);
}
return(values[0]);
}
protected AbstractSortByFirstComparableAttribute(MediaItemAspectMetadata.MultipleAttributeSpecification attr)
{
_multiAttrs = new[] { attr };
}
protected AbstractSortByComparableValueAttribute(string displayName, string groupByDisplayName, MediaItemAspectMetadata.MultipleAttributeSpecification sortAttr)
: this(displayName, groupByDisplayName, new[] { sortAttr })
{
}
