mcs/class/referencesource/System.Web.Entity.Design/System/Data/WebControls/Design/EntityDataSourceContainerNameItem.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="EntityDataSourceContainerNameItem.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //
   6 // @owner       Microsoft
   7 // @backupOwner Microsoft
   8 //------------------------------------------------------------------------------
   9
  10 using System.Data.Metadata.Edm;
  11 using System.Diagnostics;
  12
  13 namespace System.Web.UI.Design.WebControls
  14 {
  15     internal class EntityDataSourceContainerNameItem : IComparable<EntityDataSourceContainerNameItem>
  16     {
  17         // Only one of the following should be set. This is enforced through the constructors and the fact that these fields are readonly.
  18         private readonly EntityContainer _entityContainer; // used when we have a real EntityContainer backing this item
  19         private readonly string _unknownContainerName; // used when we have an unknown DefaultContainerName that we still want to include in the list
  20
  21         internal EntityDataSourceContainerNameItem(EntityContainer entityContainer)
  22         {
  23             Debug.Assert(entityContainer != null, "null entityContainer");
  24             _entityContainer = entityContainer;
  25         }
  26
  27         internal EntityDataSourceContainerNameItem(string unknownContainerName)
  28         {
  29             Debug.Assert(!String.IsNullOrEmpty(unknownContainerName), "null or empty unknownContainerName");
  30             _unknownContainerName = unknownContainerName;
  31         }
  32
  33         internal string EntityContainerName
  34         {
  35             get
  36             {
  37                 if (_entityContainer != null)
  38                 {
  39                     return _entityContainer.Name;
  40                 }
  41                 else
  42                 {
  43                     return _unknownContainerName;
  44                 }
  45             }
  46         }
  47
  48         internal EntityContainer EntityContainer
  49         {
  50             get
  51             {
  52                 // may be null if this represents an unknown container
  53                 return _entityContainer;
  54             }
  55         }
  56
  57         public override string ToString()
  58         {
  59             return this.EntityContainerName;
  60         }
  61
  62         int IComparable<EntityDataSourceContainerNameItem>.CompareTo(EntityDataSourceContainerNameItem other)
  63         {
  64             return (String.Compare(this.EntityContainerName, other.EntityContainerName, StringComparison.OrdinalIgnoreCase));
  65         }
  66     }
  67 }