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

   1 //
   2 // System.Data.Common.DbConnection
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //
   7 // Copyright (C) Tim Coleman, 2003
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  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 #if NET_2_0 || TARGET_JVM
  34
  35 using System.ComponentModel;
  36 using System.Data;
  37 #if NET_2_0 && !TARGET_JVM
  38 using System.Transactions;
  39 #endif
  40
  41 namespace System.Data.Common {
  42         public abstract class DbConnection : Component, IDbConnection, IDisposable
  43         {
  44                 #region Constructors
  45
  46                 protected DbConnection ()
  47                 {
  48                 }
  49
  50                 #endregion // Constructors
  51
  52                 #region Properties
  53
  54                 [RecommendedAsConfigurable (true)]
  55                 [RefreshProperties (RefreshProperties.All)]
  56                 [DefaultValue ("")]
  57                 public abstract string ConnectionString { get; set; }
  58
  59                 public abstract string Database { get; }
  60                 public abstract string DataSource { get; }
  61
  62                 [Browsable (false)]
  63                 public abstract string ServerVersion { get; }
  64
  65                 [Browsable (false)]
  66                 public abstract ConnectionState State { get; }
  67
  68                 public virtual int ConnectionTimeout {
  69                         get { return 15; }
  70                 }
  71
  72                 #endregion // Properties
  73
  74                 #region Methods
  75
  76                 protected abstract DbTransaction BeginDbTransaction (IsolationLevel isolationLevel);
  77
  78                 public DbTransaction BeginTransaction ()
  79                 {
  80                         return BeginDbTransaction (IsolationLevel.Unspecified);
  81                 }
  82
  83                 public DbTransaction BeginTransaction (IsolationLevel isolationLevel)
  84                 {
  85                         return BeginDbTransaction (isolationLevel);
  86                 }
  87
  88                 public abstract void ChangeDatabase (string databaseName);
  89                 public abstract void Close ();
  90
  91                 public DbCommand CreateCommand ()
  92                 {
  93                         return CreateDbCommand ();
  94                 }
  95
  96                 protected abstract DbCommand CreateDbCommand ();
  97
  98 #if NET_2_0 && !TARGET_JVM
  99                 [MonoTODO]
 100                 public virtual void EnlistTransaction (Transaction transaction)
 101                 {
 102                         throw new NotSupportedException ();
 103                 }
 104 #endif
 105
 106                 [MonoTODO]
 107                 public virtual DataTable GetSchema ()
 108                 {
 109                         throw new NotSupportedException ();
 110                 }
 111
 112                 [MonoTODO]
 113                 public virtual DataTable GetSchema (string collectionName)
 114                 {
 115                         throw new NotSupportedException ();
 116                 }
 117
 118                 [MonoTODO]
 119                 public virtual DataTable GetSchema (string collectionName, string[] restrictionValues)
 120                 {
 121                         throw new NotSupportedException ();
 122                 }
 123
 124                 IDbTransaction IDbConnection.BeginTransaction ()
 125                 {
 126                         return BeginTransaction ();
 127                 }
 128
 129                 IDbTransaction IDbConnection.BeginTransaction (IsolationLevel il)
 130                 {
 131                         return BeginTransaction (il);
 132                 }
 133
 134                 IDbCommand IDbConnection.CreateCommand ()
 135                 {
 136                         return CreateCommand ();
 137                 }
 138
 139                 public abstract void Open ();
 140
 141                 protected virtual void OnStateChange (StateChangeEventArgs stateChanged)
 142                 {
 143                         if (StateChange != null)
 144                                 StateChange (this, stateChanged);
 145                 }
 146
 147                 #endregion // Methods
 148
 149                 public virtual event StateChangeEventHandler StateChange;
 150
 151         }
 152 }
 153
 154 #endif