mcs/class/referencesource/System.Data.Entity/System/Data/Common/EntitySql/AST/NavigationExpr.cs

   1 //---------------------------------------------------------------------
   2 // <copyright file="NavigationExpr.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.Common.EntitySql.AST
  11 {
  12     using System;
  13     using System.Globalization;
  14     using System.Collections;
  15     using System.Collections.Generic;
  16
  17     /// <summary>
  18     /// Represents a relationship navigation operator NAVIGATE(sourceRefExpr, Relationship-Type-Name [,ToEndName [,FromEndName]]).
  19     /// Also used in WITH RELATIONSHIP clause as RELATIONSHIP(targetRefExpr, Relationship-Type-Name [,FromEndName [,ToEndName]]).
  20     /// </summary>
  21     internal sealed class RelshipNavigationExpr : Node
  22     {
  23         private readonly Node _refExpr;
  24         private readonly Node _relshipTypeName;
  25         private readonly Identifier _toEndIdentifier;
  26         private readonly Identifier _fromEndIdentifier;
  27
  28         /// <summary>
  29         /// Initializes relationship navigation expression.
  30         /// </summary>
  31         internal RelshipNavigationExpr(Node refExpr, Node relshipTypeName, Identifier toEndIdentifier, Identifier fromEndIdentifier)
  32         {
  33             _refExpr = refExpr;
  34             _relshipTypeName = relshipTypeName;
  35             _toEndIdentifier = toEndIdentifier;
  36             _fromEndIdentifier = fromEndIdentifier;
  37         }
  38
  39         /// <summary>
  40         /// Entity reference expression.
  41         /// </summary>
  42         internal Node RefExpr
  43         {
  44             get { return _refExpr; }
  45         }
  46
  47         /// <summary>
  48         /// Relship type name.
  49         /// </summary>
  50         internal Node TypeName
  51         {
  52             get { return _relshipTypeName; }
  53         }
  54
  55         /// <summary>
  56         /// TO end identifier.
  57         /// </summary>
  58         internal Identifier ToEndIdentifier
  59         {
  60             get { return _toEndIdentifier; }
  61         }
  62
  63         /// <summary>
  64         /// FROM end identifier.
  65         /// </summary>
  66         internal Identifier FromEndIdentifier
  67         {
  68             get { return _fromEndIdentifier; }
  69         }
  70     }
  71 }