mcs/class/System.Xml.XLinq/System.Xml.XLinq/XAttribute.cs

   1 #if NET_2_0
   2
   3 using System;
   4 using System.Collections;
   5 using System.Collections.Generic;
   6 using System.IO;
   7 using System.Text;
   8 using System.Xml;
   9
  10 using XPI = System.Xml.XLinq.XProcessingInstruction;
  11
  12
  13 namespace System.Xml.XLinq
  14 {
  15         public class XAttribute
  16         {
  17                 static IEnumerable <XAttribute> emptySequence =
  18                         new List <XAttribute> ();
  19
  20                 public static IEnumerable <XAttribute> EmptySequence {
  21                         get { return emptySequence; }
  22                 }
  23
  24                 XName name;
  25                 object value;
  26                 XElement parent;
  27
  28                 public XAttribute (XAttribute source)
  29                 {
  30                         name = source.name;
  31                         value = source.value;
  32                 }
  33
  34                 public XAttribute (XName name, object value)
  35                 {
  36                         this.name = name;
  37                         this.value = XUtil.ToString (value);
  38                 }
  39
  40                 public XName Name {
  41                         get { return name; }
  42                 }
  43
  44                 public XElement Parent {
  45                         get { return parent; }
  46                         internal set {
  47                                 parent = value;
  48                                 value.InternalAppendAttribute (this);
  49                         }
  50                 }
  51
  52                 public string Value {
  53                         get { return XUtil.ToString (value); }
  54                         set { this.value = value; }
  55                 }
  56
  57                 public override bool Equals (object obj)
  58                 {
  59                         XAttribute a = obj as XAttribute;
  60                         if (a == null)
  61                                 return false;
  62                         return a.Name == name && a.value == value;
  63                 }
  64
  65                 public override int GetHashCode ()
  66                 {
  67                         return name.GetHashCode () ^ value.GetHashCode ();
  68                 }
  69
  70                 public static explicit operator bool (XAttribute a)
  71                 {
  72                         return XUtil.ToBoolean (a.value);
  73                 }
  74
  75                 public static explicit operator Nullable <bool> (XAttribute a)
  76                 {
  77                         return a.value == null || String.Empty == a.value as string ?
  78                                 null : XUtil.ToNullableBoolean (a.value);
  79                 }
  80
  81                 // FIXME: similar conversion methods follow.
  82
  83                 public void Remove ()
  84                 {
  85                         if (parent != null) {
  86                                 parent.InternalRemoveAttribute (this);
  87                                 parent = null;
  88                         }
  89                 }
  90         }
  91 }
  92
  93 #endif