mcs/class/referencesource/System.Data.Entity/System/Data/Metadata/ModelPerspective.cs

   1 //---------------------------------------------------------------------
   2 // <copyright file="ModelPerspective.cs" company="Microsoft">
   3 //      Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //
   6 // @owner       Microsoft
   7 // @backupOwner Microsoft
   8 //---------------------------------------------------------------------
   9
  10 namespace System.Data.Metadata.Edm
  11 {
  12     using System.Collections.Generic;
  13     using System.Globalization;
  14
  15     /// <summary>
  16     /// Internal helper class for query
  17     /// </summary>
  18     internal class ModelPerspective : Perspective
  19     {
  20         #region Contructors
  21         /// <summary>
  22         /// Creates a new instance of perspective class so that query can work
  23         /// ignorant of all spaces
  24         /// </summary>
  25         /// <param name="metadataWorkspace">runtime metadata container</param>
  26         internal ModelPerspective(MetadataWorkspace metadataWorkspace)
  27             : base(metadataWorkspace, DataSpace.CSpace)
  28         {
  29         }
  30         #endregion
  31
  32         #region Methods
  33         /// <summary>
  34         /// Look up a type in the target data space based upon the fullName
  35         /// </summary>
  36         /// <param name="fullName">fullName</param>
  37         /// <param name="ignoreCase">true for case-insensitive lookup</param>
  38         /// <param name="typeUsage">The type usage object to return</param>
  39         /// <returns>True if the retrieval succeeded</returns>
  40         internal override bool TryGetTypeByName(string fullName, bool ignoreCase, out TypeUsage typeUsage )
  41         {
  42             EntityUtil.CheckStringArgument(fullName, "fullName");
  43             typeUsage = null;
  44             EdmType edmType = null;
  45             if (this.MetadataWorkspace.TryGetItem<EdmType>(fullName, ignoreCase, this.TargetDataspace, out edmType))
  46             {
  47                 if (Helper.IsPrimitiveType(edmType))
  48                 {
  49                     typeUsage = this.MetadataWorkspace.GetCanonicalModelTypeUsage(((PrimitiveType)edmType).PrimitiveTypeKind);
  50                 }
  51                 else
  52                 {
  53                     typeUsage = TypeUsage.Create(edmType);
  54                 }
  55             }
  56             return typeUsage != null;
  57         }
  58         #endregion
  59     }
  60 }