Util/SemWeb/Util.cs

   1 using System;
   2 using System.Collections;
   3
   4 using SemWeb;
   5
   6 namespace SemWeb.Util {
   7
   8         internal class ResSet : ICollection {
   9                 Hashtable items = new Hashtable();
  10                 ICollection keys;
  11
  12                 public ResSet() {
  13                 }
  14
  15                 private ResSet(Hashtable items) {
  16                         this.items = items;
  17                 }
  18
  19                 public void Add(Resource res) {
  20                         items[res] = items;
  21                         keys = null;
  22                 }
  23                 public void Remove(Resource res) {
  24                         items.Remove(res);
  25                         keys = null;
  26                 }
  27
  28                 public bool Contains(Resource res) {
  29                         return items.ContainsKey(res);
  30                 }
  31
  32                 public ICollection Items {
  33                         get {
  34                                 if (keys == null)
  35                                         keys = items.Keys;
  36                                 return keys;
  37                         }
  38                 }
  39
  40                 public void AddRange(ResSet set) {
  41                         foreach (Resource r in set.Items) {
  42                                 Add(r);
  43                         }
  44                 }
  45
  46                 public void Clear() {
  47                         items.Clear();
  48                         keys = null;
  49                 }
  50
  51                 public ResSet Clone() {
  52                         return new ResSet((Hashtable)items.Clone());
  53                 }
  54
  55                 public int Count { get { return items.Count; } }
  56
  57                 public IEnumerator GetEnumerator() { return items.Keys.GetEnumerator(); }
  58
  59                 bool ICollection.IsSynchronized { get { return false; } }
  60                 object ICollection.SyncRoot { get { return null; } }
  61
  62                 public void CopyTo(System.Array array, int index) {
  63                         foreach (Resource r in this)
  64                                 array.SetValue(r, index++);
  65                 }
  66
  67                 /*Hashtable Intersect(Hashtable x, Hashtable y) {
  68                         Hashtable a, b;
  69                         if (x.Count < y.Count) { a = x; b = y; }
  70                         else { b = x; a = y; }
  71                         Hashtable c = new Hashtable();
  72                         foreach (Resource r in a)
  73                                 if (b.ContainsKey(r))
  74                                         c[r] = c;
  75                         return c;
  76                 }*/
  77         }
  78
  79
  80 }