mcs/class/referencesource/System.Data.Entity/System/Data/Mapping/ViewGeneration/QueryRewriting/RoleBoolean.cs

   1 //---------------------------------------------------------------------
   2 // <copyright file="RoleBoolean.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.Mapping.ViewGeneration.Structures
  11 {
  12     using System.Collections.Generic;
  13     using System.Data.Common.CommandTrees;
  14     using System.Data.Entity;
  15     using System.Data.Metadata.Edm;
  16     using System.Diagnostics;
  17     using System.Text;
  18
  19     /// <summary>
  20     /// Denotes the fact that the key of the current tuple comes from a specific extent, or association role.
  21     /// </summary>
  22     internal sealed class RoleBoolean : TrueFalseLiteral
  23     {
  24         #region Constructor
  25         internal RoleBoolean(EntitySetBase extent)
  26         {
  27             m_metadataItem = extent;
  28         }
  29         internal RoleBoolean(AssociationSetEnd end)
  30         {
  31             m_metadataItem = end;
  32         }
  33         #endregion
  34
  35         #region Fields
  36         private readonly MetadataItem m_metadataItem;
  37         #endregion
  38
  39         #region BoolLiteral members
  40         /// <summary>
  41         /// Not supported in this class.
  42         /// </summary>
  43         internal override StringBuilder AsEsql(StringBuilder builder, string blockAlias, bool skipIsNotNull)
  44         {
  45             Debug.Fail("Should not be called.");
  46             return null; // To keep the compiler happy
  47         }
  48
  49         /// <summary>
  50         /// Not supported in this class.
  51         /// </summary>
  52         internal override DbExpression AsCqt(DbExpression row, bool skipIsNotNull)
  53         {
  54             Debug.Fail("Should not be called.");
  55             return null; // To keep the compiler happy
  56         }
  57
  58         internal override StringBuilder AsUserString(StringBuilder builder, string blockAlias, bool skipIsNotNull)
  59         {
  60             AssociationSetEnd end = m_metadataItem as AssociationSetEnd;
  61             if (end != null)
  62             {
  63                 builder.Append(Strings.ViewGen_AssociationSet_AsUserString(blockAlias, end.Name, end.ParentAssociationSet));
  64             }
  65             else
  66             {
  67                 builder.Append(Strings.ViewGen_EntitySet_AsUserString(blockAlias, m_metadataItem.ToString()));
  68             }
  69             return builder;
  70         }
  71
  72         internal override StringBuilder AsNegatedUserString(StringBuilder builder, string blockAlias, bool skipIsNotNull)
  73         {
  74             AssociationSetEnd end = m_metadataItem as AssociationSetEnd;
  75             if (end != null)
  76             {
  77                 builder.Append(Strings.ViewGen_AssociationSet_AsUserString_Negated(blockAlias, end.Name, end.ParentAssociationSet));
  78             }
  79             else
  80             {
  81                 builder.Append(Strings.ViewGen_EntitySet_AsUserString_Negated(blockAlias, m_metadataItem.ToString()));
  82             }
  83             return builder;
  84         }
  85
  86         internal override void GetRequiredSlots(MemberProjectionIndex projectedSlotMap, bool[] requiredSlots)
  87         {
  88             throw new NotImplementedException();
  89         }
  90
  91         protected override bool IsEqualTo(BoolLiteral right)
  92         {
  93             RoleBoolean rightBoolean = right as RoleBoolean;
  94             if (rightBoolean == null)
  95             {
  96                 return false;
  97             }
  98             return m_metadataItem == rightBoolean.m_metadataItem;
  99         }
 100
 101         public override int GetHashCode()
 102         {
 103             return m_metadataItem.GetHashCode();
 104         }
 105
 106         internal override BoolLiteral RemapBool(Dictionary<MemberPath, MemberPath> remap)
 107         {
 108             return this;
 109         }
 110         #endregion
 111
 112         #region Other Methods
 113         internal override void ToCompactString(StringBuilder builder)
 114         {
 115             AssociationSetEnd end = m_metadataItem as AssociationSetEnd;
 116             if (end != null)
 117             {
 118                 builder.Append("InEnd:" + end.ParentAssociationSet + "_" + end.Name);
 119             }
 120             else
 121             {
 122                 builder.Append("InSet:" + m_metadataItem.ToString());
 123             }
 124         }
 125         #endregion
 126     }
 127 }