Business Objects

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Revision as of 22:03, 2 November 2007

Business objects in Caisis represent database tables, allowing clients (e.g. Caisis.UI) to transparently store and retrieve data, and access table metadata.

Creating a New Business Object

Before creating a new Business Object, you should look at the source code for an existing Business Object (preferably one that represents a database table similar to the one for which you are creating a new Business Object) and compare it to the structure of the database table it represents.

Consider the following snippet of Caisis.BusinessObject.Encounter.cs:

   [Tablename("Encounters")]
   [ParentTablename("Patients")]
   [Disease("All")]
   [Exportable]
   [HasSiblings]
   public class Encounter : BizObject
   {
       [NotNull]
       [ParentKey]
       [DataType(typeof(System.Int32))]
       [Deidentify(DeidentifyOptions.Randomize)]
       [LimitIdentification(LimitIdentificationOptions.Randomize)]
       public static readonly String PatientId = "PatientId";
       
       [PrimaryKey]
       [DataType(typeof(System.Int32))]
       public static readonly String EncounterId = "EncounterId";
       
       [DataType(typeof(System.Byte))]
       public static readonly String EncPending = "EncPending";
       
       [DataType(typeof(System.String))]
       [Deidentify(DeidentifyOptions.Omit)]
       public static readonly String EncDateText = "EncDateText";
       
       [DataType(typeof(System.DateTime))]
       [Deidentify(DeidentifyOptions.MaskDate)]
       public static readonly String EncDate = "EncDate";
       
       [DataType(typeof(System.String))]
       public static readonly String EncType = "EncType";
       ...
   }