mcs/class/referencesource/System.Xml/System/Xml/XPath/Internal/IteratorFilter.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="IteratorFilter.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">[....]</owner>
   6 //------------------------------------------------------------------------------
   7
   8 namespace MS.Internal.Xml.XPath {
   9     using System;
  10     using System.Xml;
  11     using System.Xml.XPath;
  12     using System.Diagnostics;
  13     using System.Globalization;
  14
  15     internal class IteratorFilter : XPathNodeIterator {
  16         private XPathNodeIterator innerIterator;
  17         private string            name;
  18         private int               position = 0;
  19
  20         internal IteratorFilter(XPathNodeIterator innerIterator, string name) {
  21             this.innerIterator = innerIterator;
  22             this.name          = name;
  23         }
  24
  25         private IteratorFilter(IteratorFilter it) {
  26             this.innerIterator = it.innerIterator.Clone();
  27             this.name          = it.name;
  28             this.position      = it.position;
  29         }
  30
  31         public override XPathNodeIterator Clone()         { return new IteratorFilter(this); }
  32         public override XPathNavigator    Current         { get { return innerIterator.Current;} }
  33         public override int               CurrentPosition { get { return this.position; } }
  34
  35         public override bool MoveNext() {
  36             while(innerIterator.MoveNext()) {
  37                 if(innerIterator.Current.LocalName == this.name) {
  38                     this.position ++;
  39                     return true;
  40                 }
  41             }
  42             return false;
  43         }
  44     }
  45 }