mcs/class/referencesource/System.Data.Entity/System/Data/Common/Internal/Materialization/ShaperFactory.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="ShaperFactory.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">[....]</owner>
   6 // <owner current="true" primary="false">[....]</owner>
   7 //------------------------------------------------------------------------------
   8
   9 using System.Data.Common.QueryCache;
  10 using System.Data.Metadata.Edm;
  11 using System.Data.Objects;
  12 using System.Data.Objects.Internal;
  13 using System.Data.Query.InternalTrees;
  14 using System.Diagnostics;
  15 using System.Runtime.CompilerServices;
  16
  17 namespace System.Data.Common.Internal.Materialization
  18 {
  19     /// <summary>
  20     /// An immutable type used to generate Shaper instances.
  21     /// </summary>
  22     internal abstract class ShaperFactory
  23     {
  24         [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)]
  25         internal static ShaperFactory Create(Type elementType, QueryCacheManager cacheManager, ColumnMap columnMap, MetadataWorkspace metadata, SpanIndex spanInfo, MergeOption mergeOption, bool valueLayer)
  26         {
  27             ShaperFactoryCreator creator = (ShaperFactoryCreator)Activator.CreateInstance(typeof(TypedShaperFactoryCreator<>).MakeGenericType(elementType));
  28             return creator.TypedCreate(cacheManager, columnMap, metadata, spanInfo, mergeOption, valueLayer);
  29         }
  30
  31         private abstract class ShaperFactoryCreator
  32         {
  33             internal abstract ShaperFactory TypedCreate(QueryCacheManager cacheManager, ColumnMap columnMap, MetadataWorkspace metadata, SpanIndex spanInfo, MergeOption mergeOption, bool valueLayer);
  34         }
  35
  36         private sealed class TypedShaperFactoryCreator<T> : ShaperFactoryCreator
  37         {
  38             public TypedShaperFactoryCreator() {}
  39             internal override ShaperFactory TypedCreate(QueryCacheManager cacheManager, ColumnMap columnMap, MetadataWorkspace metadata, SpanIndex spanInfo, MergeOption mergeOption, bool valueLayer)
  40             {
  41                 return Translator.TranslateColumnMap<T>(cacheManager, columnMap, metadata, spanInfo, mergeOption, valueLayer);
  42             }
  43         }
  44     }
  45
  46     /// <summary>
  47     /// Typed ShaperFactory
  48     /// </summary>
  49     internal class ShaperFactory<T> : ShaperFactory
  50     {
  51         private readonly int _stateCount;
  52         private readonly CoordinatorFactory<T> _rootCoordinatorFactory;
  53         private readonly Action _checkPermissions;
  54         private readonly MergeOption _mergeOption;
  55
  56         internal ShaperFactory(int stateCount, CoordinatorFactory<T> rootCoordinatorFactory, Action checkPermissions, MergeOption mergeOption)
  57         {
  58             _stateCount = stateCount;
  59             _rootCoordinatorFactory = rootCoordinatorFactory;
  60             _checkPermissions = checkPermissions;
  61             _mergeOption = mergeOption;
  62         }
  63
  64         /// <summary>
  65         /// Factory method to create the Shaper for Object Layer queries.
  66         /// </summary>
  67         internal Shaper<T> Create(DbDataReader reader, ObjectContext context, MetadataWorkspace workspace, MergeOption mergeOption, bool readerOwned)
  68         {
  69             Debug.Assert(mergeOption == _mergeOption, "executing a query with a different mergeOption than was used to compile the delegate");
  70             return new Shaper<T>(reader, context, workspace, mergeOption, _stateCount, _rootCoordinatorFactory, _checkPermissions, readerOwned);
  71         }
  72     }
  73 }