mcs/class/System.Data/System.Data.Common/DataColumnMappingCollection.cs

   1 //
   2 // System.Data.Common.DataColumnCollection
   3 //
   4 // Author:
   5 //   Rodrigo Moya (rodrigo@ximian.com)
   6 //   Tim Coleman (tim@timcoleman.com)
   7 //
   8 // (C) Ximian, Inc
   9 // (C) Copyright 2002 Tim Coleman
  10 //
  11
  12 using System;
  13 using System.Collections;
  14 using System.Data;
  15
  16 namespace System.Data.Common
  17 {
  18         /// <summary>
  19         /// Contains a collection of DataColumnMapping objects. This class cannot be inherited.
  20         /// </summary>
  21         public sealed class DataColumnMappingCollection : MarshalByRefObject // , IColumnMappingCollection , IList, ICollection, IEnumerable
  22         {
  23                 #region Fields
  24
  25                 ArrayList list;
  26                 Hashtable sourceColumns;
  27                 Hashtable dataSetColumns;
  28
  29                 #endregion
  30
  31                 #region Constructors
  32
  33                 public DataColumnMappingCollection ()
  34                 {
  35                         list = new ArrayList ();
  36                         sourceColumns = new Hashtable ();
  37                         dataSetColumns = new Hashtable ();
  38                 }
  39
  40                 #endregion
  41
  42                 #region Properties
  43
  44                 public int Count {
  45                         get { return list.Count; }
  46                 }
  47
  48                 public DataColumnMapping this[int index] {
  49                         get { return (DataColumnMapping)(list[index]); }
  50                         set {
  51                                 DataColumnMapping mapping = (DataColumnMapping)(list[index]);
  52                                 sourceColumns[mapping] = value;
  53                                 dataSetColumns[mapping] = value;
  54                                 list[index] = value;
  55                         }
  56                 }
  57
  58                 public DataColumnMapping this[string sourceColumn] {
  59                         get { return (DataColumnMapping)(sourceColumns[sourceColumn]); }
  60                         set { this[list.IndexOf (sourceColumns[sourceColumn])] = value; }
  61                 }
  62
  63                 #endregion
  64
  65                 #region Methods
  66
  67                 public int Add (object value)
  68                 {
  69                         if (!(value is DataColumnMapping))
  70                                 throw new InvalidCastException ();
  71
  72                         list.Add (value);
  73                         sourceColumns[((DataColumnMapping)value).SourceColumn] = value;
  74                         dataSetColumns[((DataColumnMapping)value).DataSetColumn] = value;
  75                         return list.IndexOf (value);
  76                 }
  77
  78                 public DataColumnMapping Add (string sourceColumn, string dataSetColumn)
  79                 {
  80                         DataColumnMapping mapping = new DataColumnMapping (sourceColumn, dataSetColumn);
  81                         Add (mapping);
  82                         return mapping;
  83                 }
  84
  85                 public void AddRange (DataColumnMapping[] values)
  86                 {
  87                         foreach (DataColumnMapping mapping in values)
  88                                 Add (mapping);
  89                 }
  90
  91                 public void Clear ()
  92                 {
  93                         list.Clear ();
  94                 }
  95
  96                 public bool Contains (object value)
  97                 {
  98                         return (list.Contains (value));
  99                 }
 100
 101                 public bool Contains (string value)
 102                 {
 103                         return (sourceColumns.Contains (value));
 104                 }
 105
 106                 public void CopyTo (Array array, int index)
 107                 {
 108                         ((DataColumn[])(list.ToArray())).CopyTo (array, index);
 109                 }
 110
 111                 public DataColumnMapping GetByDataSetColumn (string value)
 112                 {
 113                         return (DataColumnMapping)(dataSetColumns[value]);
 114                 }
 115
 116                 public static DataColumnMapping GetColumnMappingBySchemaAction (DataColumnMappingCollection columnMappings, string sourceColumn, MissingMappingAction mappingAction)
 117                 {
 118                         if (columnMappings.Contains (sourceColumn))
 119                                 return columnMappings[sourceColumn];
 120
 121                         if (mappingAction == MissingMappingAction.Ignore)
 122                                 return null;
 123
 124                         if (mappingAction == MissingMappingAction.Error)
 125                                 throw new SystemException ();
 126
 127                         return new DataColumnMapping (sourceColumn, sourceColumn);
 128                 }
 129
 130                 public IEnumerator GetEnumerator ()
 131                 {
 132                         return list.GetEnumerator ();
 133                 }
 134
 135 /* FIXME
 136                 IColumnMapping IColumnMappingCollection.Add (string sourceColumnName, string dataSetColumnName)
 137                 {
 138                         return (IColumnMapping)(Add (sourceColumnName, dataSetColumnName));
 139                 }
 140
 141                 IColumnMapping IColumnMappingCollection.GetByDataSetColumn (string dataSetColumnName)
 142                 {
 143                         return (IColumnMapping)(GetByDataSetColumn (dataSetColumnName));
 144                 }
 145 */
 146
 147                 public int IndexOf (object value)
 148                 {
 149                         return list.IndexOf (value);
 150                 }
 151
 152                 public int IndexOf (string sourceColumn)
 153                 {
 154                         return list.IndexOf (sourceColumns[sourceColumn]);
 155                 }
 156
 157                 public int IndexOfDataSetColumn (string value)
 158                 {
 159                         return list.IndexOf (dataSetColumns[value]);
 160                 }
 161
 162                 public void Insert (int index, object value)
 163                 {
 164                         list.Insert (index, value);
 165                         sourceColumns[((DataColumnMapping)value).SourceColumn] = value;
 166                         dataSetColumns[((DataColumnMapping)value).DataSetColumn] = value;
 167                 }
 168
 169                 public void Remove (object value)
 170                 {
 171                         sourceColumns.Remove(((DataColumnMapping)value).SourceColumn);
 172                         dataSetColumns.Remove(((DataColumnMapping)value).DataSetColumn);
 173                         list.Remove (value);
 174                 }
 175
 176                 public void RemoveAt (int index)
 177                 {
 178                         Remove (list[index]);
 179                 }
 180
 181                 public void RemoveAt (string sourceColumn)
 182                 {
 183                         RemoveAt (list.IndexOf (sourceColumns[sourceColumn]));
 184                 }
 185
 186                 #endregion
 187         }
 188 }