backporting imediaservice changes

src/Umbraco.Core/Services/IMediaService.cs

@@ -9,6 +9,8 @@ namespace Umbraco.Core.Services
     /// </summary>
     public interface IMediaService : IService
     {
+        IEnumerable<IMedia> GetByIds(IEnumerable<int> ids);
+
         /// <summary>
         /// Creates an <see cref="IMedia"/> object using the alias of the <see cref="IMediaType"/>
         /// that this Media should based on.
@@ -193,7 +195,7 @@ namespace Umbraco.Core.Services
         /// </summary>
         /// <param name="mediaPath">Path of the media item to retreive (for example: /media/1024/koala_403x328.jpg)</param>
         /// <returns><see cref="IMedia"/></returns>
-        IMedia GetMediaByPath(string mediaPath);        
+        IMedia GetMediaByPath(string mediaPath);
 
         /// <summary>
         /// Gets a collection of <see cref="IMedia"/> objects, which are ancestors of the current media.

src/Umbraco.Core/Services/MediaService.cs

@@ -206,6 +206,19 @@ namespace Umbraco.Core.Services
 			}
 		}
 
+        /// <summary>
+        /// Gets an <see cref="IMedia"/> object by Id
+        /// </summary>
+        /// <param name="ids">Ids of the Media to retrieve</param>
+        /// <returns><see cref="IMedia"/></returns>
+        public IEnumerable<IMedia> GetByIds(IEnumerable<int> ids)
+        {
+            using (var repository = _repositoryFactory.CreateMediaRepository(_uowProvider.GetUnitOfWork()))
+            {
+                return repository.GetAll(ids.ToArray());
+            }
+        }
+
         /// <summary>
         /// Gets an <see cref="IMedia"/> object by its 'UniqueId'
         /// </summary>