Another BL Optimization /:

1 files changed, 82 insertions, 0 deletions

diff --git a/Software/Visual_Studio/Tango.BL/IObservableEntity.cs b/Software/Visual_Studio/Tango.BL/IObservableEntity.cs
new file mode 100644
index 000000000..9e0a8801d
--- /dev/null
+++ b/Software/Visual_Studio/Tango.BL/IObservableEntity.cs
@@ -0,0 +1,82 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Data.Entity;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Core;
+
+namespace Tango.BL
+{
+    /// <summary>
+    /// Represents an observable database entity.
+    /// </summary>
+    public interface IObservableEntity : IParameterized
+    {
+        /// <summary>
+        /// Occurs after this observable has been saved.
+        /// </summary>
+        event EventHandler Saved;
+
+        /// <summary>
+        /// Gets or sets the entity identifier.
+        /// </summary>
+        [Column("ID")]
+        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
+        [ParameterIgnore]
+        Int32 ID { get; set; }
+
+        /// <summary>
+        /// Gets or sets the entity unique identifier.
+        /// </summary>
+        [Key]
+        [Column("GUID")]
+        [ParameterIgnore]
+        String Guid { get; set; }
+
+        /// <summary>
+        /// Gets or sets the entity last updated data and time.
+        /// </summary>
+        [Column("LAST_UPDATED")]
+        [ParameterIgnore]
+        DateTime LastUpdated { get; set; }
+
+        /// <summary>
+        /// Saves the changes on this entity to database.
+        /// </summary>
+        void Save(ObservablesContext context);
+
+        /// <summary>
+        /// Attaches this observable to the proper DbSet.
+        /// </summary>
+        void Attach(ObservablesContext context);
+
+        /// <summary>
+        /// Detaches this observable from the proper DbSet.
+        /// </summary>
+        void Detach(ObservablesContext context);
+
+        /// <summary>
+        /// Saves the changes on this entity to database asynchronously.
+        /// </summary>
+        /// <returns></returns>
+        Task SaveAsync(ObservablesContext context);
+
+        /// <summary>
+        /// Deletes this entity from the database.
+        /// </summary>
+        void Delete(ObservablesContext context);
+
+        /// <summary>
+        /// Deletes this entity without saving changes to data base.
+        /// </summary>
+        void DefferedDelete(ObservablesContext context);
+
+        /// <summary>
+        /// Deletes this entity from the database.
+        /// </summary>
+        Task DeleteAsync(ObservablesContext context);
+    }
+}