mcs/class/System/System.Text.RegularExpressions/GroupCollection.cs

   1 //
   2 // System.Text.RegularExpressions.GroupCollection
   3 //
   4 // Authors:
   5 //      Dan Lewis (dlewis@gmx.co.uk)
   6 //      Dick Porter (dick@ximian.com)
   7 //
   8 // (C) 2002 Dan Lewis
   9 // (C) 2004 Novell, Inc.
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35
  36 namespace System.Text.RegularExpressions
  37 {
  38         [Serializable]
  39         public class GroupCollection: ICollection, IEnumerable
  40         {
  41                 private ArrayList list;
  42
  43                 /* No public constructor */
  44                 internal GroupCollection () {
  45                         list = new ArrayList ();
  46                 }
  47
  48                 public virtual int Count {
  49                         get {
  50                                 return(list.Count);
  51                         }
  52                 }
  53
  54                 public bool IsReadOnly {
  55                         get {
  56                                 return(true);
  57                         }
  58                 }
  59
  60                 public virtual bool IsSynchronized {
  61                         get {
  62                                 return(false);
  63                         }
  64                 }
  65
  66                 public Group this[int i] {
  67                         get {
  68                                 if (i < list.Count &&
  69                                     i >= 0) {
  70                                         return((Group)list[i]);
  71                                 } else {
  72                                         return(new Group ());
  73                                 }
  74                         }
  75                 }
  76
  77                 public Group this[string groupName] {
  78                         get {
  79                                 foreach (object o in list) {
  80                                         if (!(o is Match)) {
  81                                                 continue;
  82                                         }
  83
  84                                         int index = ((Match)o).Regex.GroupNumberFromName (groupName);
  85
  86                                         if (index != -1) {
  87                                                 return(this[index]);
  88                                         }
  89                                 }
  90
  91                                 return(new Group ());
  92                         }
  93                 }
  94
  95                 public virtual object SyncRoot {
  96                         get {
  97                                 return(list);
  98                         }
  99                 }
 100
 101                 public virtual void CopyTo (Array array, int index) {
 102                         foreach (object o in list) {
 103                                 if (index > array.Length) {
 104                                         break;
 105                                 }
 106
 107                                 array.SetValue (o, index++);
 108                         }
 109                 }
 110
 111                 public virtual IEnumerator GetEnumerator () {
 112                         return(new Enumerator (list));
 113                 }
 114
 115                 internal void Add (object o) {
 116                         list.Add (o);
 117                 }
 118
 119                 internal void Reverse () {
 120                         list.Reverse ();
 121                 }
 122
 123                 private class Enumerator: IEnumerator {
 124                         private IList list;
 125                         private int ptr;
 126
 127                         public Enumerator (IList list) {
 128                                 this.list = list;
 129                                 Reset ();
 130                         }
 131
 132                         public object Current {
 133                                 get {
 134                                         if (ptr >= list.Count) {
 135                                                 throw new InvalidOperationException ();
 136                                         }
 137
 138                                         return(list[ptr]);
 139                                 }
 140                         }
 141
 142                         public bool MoveNext () {
 143                                 if (ptr > list.Count) {
 144                                         throw new InvalidOperationException ();
 145                                 }
 146
 147                                 return(++ptr < list.Count);
 148                         }
 149
 150                         public void Reset () {
 151                                 ptr = -1;
 152                         }
 153                 }
 154         }
 155 }
 156
 157
 158