/// <summary>
/// Perform a deep copy of this metadata collection.
/// </summary>
/// <returns>
/// Returns a deep copy of this metadata collection.
/// </returns>
public IGalleryObjectMetadataItemCollection Copy()
{
IGalleryObjectMetadataItemCollection metaDataItemCollectionCopy = new GalleryObjectMetadataItemCollection();
foreach (IGalleryObjectMetadataItem metaDataItem in this.Items)
{
metaDataItemCollectionCopy.Add(metaDataItem.Copy());
}
return(metaDataItemCollectionCopy);
}
/// <summary>
/// Gets the items in the collection that are visible to the UI. That is, get the items where <see cref="IGalleryObjectMetadataItem.IsVisible" />
/// = <c>true</c>.
/// </summary>
/// <returns>Returns a list of items that are visible to the UI.</returns>
public IGalleryObjectMetadataItemCollection GetVisibleItems()
{
// We know galleryObjectMetadataItems is actually a List<IGalleryObjectMetadataItem> because we passed it to the constructor.
List <IGalleryObjectMetadataItem> galleryObjectMetadataItems = (List <IGalleryObjectMetadataItem>)Items;
IGalleryObjectMetadataItemCollection metadataItemsCollection = new GalleryObjectMetadataItemCollection();
galleryObjectMetadataItems.ForEach(delegate(IGalleryObjectMetadataItem metaItem)
{
if (metaItem.IsVisible)
{
metadataItemsCollection.Add(metaItem);
}
});
return(metadataItemsCollection);
}
/// <summary>
/// Get a list of items whose metadata must be persisted to the data store, either because it has been added or because
/// it has been modified. All IGalleryObjectMetadataItem whose HasChanges property are true are returned. This is called during a
/// save operation to indicate which metadata items must be saved. Guaranteed to not return null. If no items
/// are found, an empty collection is returned.
/// </summary>
/// <returns>
/// Returns a list of items whose metadata must be updated with the metadata currently in the media object's file.
/// </returns>
public IGalleryObjectMetadataItemCollection GetItemsToSave()
{
// We know galleryObjectMetadataItems is actually a List<IGalleryObjectMetadataItem> because we passed it to the constructor.
var galleryObjectMetadataItems = (List <IGalleryObjectMetadataItem>)Items;
IGalleryObjectMetadataItemCollection metadataItemsCollection = new GalleryObjectMetadataItemCollection();
galleryObjectMetadataItems.ForEach(delegate(IGalleryObjectMetadataItem metaItem)
{
if (metaItem.HasChanges)
{
metadataItemsCollection.Add(metaItem);
}
});
return(metadataItemsCollection);
}