mcs/class/System.XML/System.Xml/XmlQualifiedName.cs

   1 //
   2 // System.Xml.XmlQualifiedName.cs
   3 //
   4 // Author: Duncan Mak (duncan@ximian.com)
   5 //
   6 // (C) Ximian, Inc.
   7 //
   8 // Modified:
   9 //              21st June 2002 : Ajay kumar Dwivedi (adwiv@yahoo.com)
  10
  11 using System;
  12
  13 namespace System.Xml
  14 {
  15         public class XmlQualifiedName
  16         {
  17                 // Constructors
  18                 public XmlQualifiedName ()
  19                         : this (string.Empty, string.Empty)
  20                 {
  21                 }
  22
  23                 public XmlQualifiedName (string name)
  24                         : this (name, string.Empty)
  25                 {
  26                 }
  27
  28                 public XmlQualifiedName (string name, string ns)
  29                         : base ()
  30                 {
  31                         this.name = (name == null) ? "" : name;
  32                         this.ns = (ns == null) ? "" : ns;
  33                         this.hash = name.GetHashCode () ^ ns.GetHashCode ();
  34                 }
  35
  36                 // Fields
  37                 public static readonly XmlQualifiedName Empty = new XmlQualifiedName ();
  38                 private readonly string name;
  39                 private readonly string ns;
  40                 private readonly int hash;
  41
  42                 // Properties
  43                 public bool IsEmpty
  44                 {
  45                         get {
  46                                 return name.Length == 0 && ns.Length == 0;
  47                         }
  48                 }
  49
  50                 public string Name
  51                 {
  52                         get { return name; }
  53                 }
  54
  55                 public string Namespace
  56                 {
  57                         get { return ns; }
  58                 }
  59
  60                 // Methods
  61                 public override bool Equals (object other)
  62                 {
  63                         return this == (other as XmlQualifiedName);
  64                 }
  65
  66                 public override int GetHashCode ()
  67                 {
  68                         return hash;
  69                 }
  70
  71                 public override string ToString ()
  72                 {
  73                         if (ns == string.Empty)
  74                                 return name;
  75                         else
  76                                 return ns + ":" + name;
  77                 }
  78
  79                 public static string ToString (string name, string ns)
  80                 {
  81                         if (ns == string.Empty)
  82                                 return name;
  83                         else
  84                                 return ns + ":" + name;
  85                 }
  86
  87                 // Operators
  88                 public static bool operator == (XmlQualifiedName a, XmlQualifiedName b)
  89                 {
  90                         if((Object)a == (Object)b)
  91                                 return true;
  92
  93                         if((Object)a == null || (Object)b == null)
  94                                 return false;
  95
  96                         return (a.hash == b.hash) && (a.name == b.name) && (a.ns == b.ns);
  97                 }
  98
  99                 public static bool operator != (XmlQualifiedName a, XmlQualifiedName b)
 100                 {
 101                         return !(a == b);
 102                 }
 103         }
 104 }