mcs/class/referencesource/System.Data.SqlXml/System/Xml/Xsl/QIL/QilTernary.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="QilTernary.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 //------------------------------------------------------------------------------
   7 using System;
   8 using System.Collections.Generic;
   9 using System.Diagnostics;
  10
  11 namespace System.Xml.Xsl.Qil {
  12
  13     /// <summary>
  14     /// View over a Qil operator having three children.
  15     /// </summary>
  16     /// <remarks>
  17     /// Don't construct QIL nodes directly; instead, use the <see cref="QilFactory">QilFactory</see>.
  18     /// </remarks>
  19     internal class QilTernary : QilNode {
  20         private QilNode left, center, right;
  21
  22
  23         //-----------------------------------------------
  24         // Constructor
  25         //-----------------------------------------------
  26
  27         /// <summary>
  28         /// Construct a new node
  29         /// </summary>
  30         public QilTernary(QilNodeType nodeType, QilNode left, QilNode center, QilNode right) : base(nodeType) {
  31             this.left = left;
  32             this.center = center;
  33             this.right = right;
  34         }
  35
  36
  37         //-----------------------------------------------
  38         // IList<QilNode> methods -- override
  39         //-----------------------------------------------
  40
  41         public override int Count {
  42             get { return 3; }
  43         }
  44
  45         public override QilNode this[int index] {
  46             get {
  47                 switch (index) {
  48                     case 0: return this.left;
  49                     case 1: return this.center;
  50                     case 2: return this.right;
  51                     default: throw new IndexOutOfRangeException();
  52                 }
  53             }
  54             set {
  55                 switch (index) {
  56                     case 0: this.left = value; break;
  57                     case 1: this.center = value; break;
  58                     case 2: this.right = value; break;
  59                     default: throw new IndexOutOfRangeException();
  60                 }
  61             }
  62         }
  63
  64
  65         //-----------------------------------------------
  66         // QilTernary methods
  67         //-----------------------------------------------
  68
  69         public QilNode Left {
  70             get { return this.left; }
  71             set { this.left = value; }
  72         }
  73
  74         public QilNode Center {
  75             get { return this.center; }
  76             set { this.center = value; }
  77         }
  78
  79         public QilNode Right {
  80             get { return this.right; }
  81             set { this.right = value; }
  82         }
  83     }
  84 }