mcs/class/System.Data/System.Data/InternalDataCollectionBase.cs

   1 //
   2 // System.Data.InternalDataCollectionBase.cs
   3 //
   4 // Base class for:
   5 //     DataRowCollection
   6 //     DataColumnCollection
   7 //     DataTableCollection
   8 //     DataRelationCollection
   9 //     DataConstraintCollection
  10 //
  11 // Author:
  12 //   Daniel Morgan <danmorg@sc.rr.com>
  13 //   Tim Coleman <tim@timcoleman.com>
  14 //
  15 // (C) Copyright 2002 Daniel Morgan
  16 // (C) Copyright 2002 Tim Coleman
  17 //
  18
  19 using System;
  20 using System.Collections;
  21 using System.ComponentModel;
  22
  23 namespace System.Data
  24 {
  25         /// <summary>
  26         /// Base class for System.Data collection classes
  27         /// that are used within a DataTable object
  28         /// to represent a collection of
  29         /// relations, tables, rows, columns, and constraints
  30         /// </summary>
  31
  32         public class InternalDataCollectionBase : ICollection, IEnumerable
  33         {
  34                 #region Fields
  35
  36                 protected ArrayList list = null;
  37                 protected bool readOnly = false;
  38                 protected bool synchronized = false;
  39
  40                 #endregion
  41
  42                 #region Constructors
  43
  44                 [MonoTODO]
  45                 public InternalDataCollectionBase()
  46                 {
  47                         list = new ArrayList();
  48                 }
  49
  50                 #endregion
  51
  52                 #region Properties
  53
  54                 /// <summary>
  55                 /// Gets the total number of elements in a collection.
  56                 /// </summary>
  57                 public virtual int Count {
  58                         get { return list.Count; }
  59                 }
  60
  61                 /// <summary>
  62                 /// Gets a value indicating whether the InternalDataCollectionBase is read-only.
  63                 /// </summary>
  64                 public bool IsReadOnly {
  65                         get { return readOnly; }
  66                 }
  67
  68                 /// <summary>
  69                 /// Gets a value indicating whether the InternalDataCollectionBase is synchronized.
  70                 /// </summary>
  71                 public bool IsSynchronized {
  72                         get { return synchronized; }
  73                 }
  74
  75                 /// <summary>
  76                 /// Gets the items of the collection as a list.
  77                 /// </summary>
  78                 protected internal virtual ArrayList List {
  79                         get { return list; }
  80                 }
  81
  82                 /// <summary>
  83                 /// Gets an object that can be used to synchronize the collection.
  84                 /// </summary>
  85                 public object SyncRoot {
  86                         [MonoTODO]
  87                         get {
  88                                 // FIXME: how do we sync?
  89                                 throw new NotImplementedException ();
  90                         }
  91                 }
  92
  93
  94                 #endregion
  95
  96                 #region Methods
  97
  98                 /// <summary>
  99                 /// Copies all the elements in the current InternalDataCollectionBase to a one-
 100                 /// dimensional Array, starting at the specified InternalDataCollectionBase index.
 101                 /// </summary>
 102                 public void CopyTo(Array ar, int index)
 103                 {
 104                         list.CopyTo (ar, index);
 105
 106                 }
 107
 108                 /// <summary>
 109                 /// Gets an IEnumerator for the collection.
 110                 /// </summary>
 111                 public IEnumerator GetEnumerator()
 112                 {
 113                         return list.GetEnumerator ();
 114                 }
 115
 116                 #endregion
 117         }
 118 }