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309 lines
12 KiB
309 lines
12 KiB
// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2 as published by
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// the Free Software Foundation
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//
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// There are special exceptions to the terms and conditions of the GPL
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// as it is applied to this software. View the full text of the
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// exception in file EXCEPTIONS in the directory of this software
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// distribution.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Data;
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using System.Data.Common;
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using System.ComponentModel;
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using System.Collections.Generic;
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namespace MySql.Data.MySqlClient
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{
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/class/*'/>
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#if !CF
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[System.Drawing.ToolboxBitmap( typeof(MySqlDataAdapter), "MySqlClient.resources.dataadapter.bmp")]
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[System.ComponentModel.DesignerCategory("Code")]
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[Designer("MySql.Data.MySqlClient.Design.MySqlDataAdapterDesigner,MySqlClient.Design")]
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#endif
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public sealed class MySqlDataAdapter : DbDataAdapter, IDbDataAdapter, IDataAdapter, ICloneable
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{
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private bool loadingDefaults;
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private int updateBatchSize;
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List<IDbCommand> commandBatch;
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/// <summary>
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/// Occurs during Update before a command is executed against the data source. The attempt to update is made, so the event fires.
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/// </summary>
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public event MySqlRowUpdatingEventHandler RowUpdating;
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/// <summary>
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/// Occurs during Update after a command is executed against the data source. The attempt to update is made, so the event fires.
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/// </summary>
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public event MySqlRowUpdatedEventHandler RowUpdated;
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/Ctor/*'/>
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public MySqlDataAdapter()
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{
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loadingDefaults = true;
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updateBatchSize = 1;
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}
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/Ctor1/*'/>
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public MySqlDataAdapter(MySqlCommand selectCommand) : this()
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{
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SelectCommand = selectCommand;
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}
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/Ctor2/*'/>
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public MySqlDataAdapter(string selectCommandText, MySqlConnection connection) : this()
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{
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SelectCommand = new MySqlCommand(selectCommandText, connection);
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}
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/Ctor3/*'/>
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public MySqlDataAdapter(string selectCommandText, string selectConnString) : this()
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{
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SelectCommand = new MySqlCommand(selectCommandText,
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new MySqlConnection(selectConnString) );
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}
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#region Properties
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/DeleteCommand/*'/>
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#if !CF
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[Description("Used during Update for deleted rows in Dataset.")]
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#endif
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public new MySqlCommand DeleteCommand
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{
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get { return (MySqlCommand)base.DeleteCommand; }
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set { base.DeleteCommand = value; }
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}
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/InsertCommand/*'/>
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#if !CF
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[Description("Used during Update for new rows in Dataset.")]
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#endif
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public new MySqlCommand InsertCommand
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{
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get { return (MySqlCommand)base.InsertCommand; }
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set { base.InsertCommand = value; }
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}
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/SelectCommand/*'/>
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#if !CF
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[Description("Used during Fill/FillSchema")]
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[Category("Fill")]
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#endif
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public new MySqlCommand SelectCommand
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{
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get { return (MySqlCommand)base.SelectCommand; }
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set { base.SelectCommand = value; }
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}
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/// <include file='docs/MySqlDataAdapter.xml' path='docs/UpdateCommand/*'/>
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#if !CF
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[Description("Used during Update for modified rows in Dataset.")]
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#endif
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public new MySqlCommand UpdateCommand
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{
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get { return (MySqlCommand)base.UpdateCommand; }
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set { base.UpdateCommand = value; }
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}
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internal bool LoadDefaults
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{
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get { return loadingDefaults; }
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set { loadingDefaults = value; }
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}
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#endregion
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#region Batching Support
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public override int UpdateBatchSize
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{
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get { return updateBatchSize; }
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set { updateBatchSize = value; }
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}
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protected override void InitializeBatching()
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{
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commandBatch = new List<IDbCommand>();
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}
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protected override int AddToBatch(IDbCommand command)
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{
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// the first time each command is asked to be batched, we ask
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// that command to prepare its batchable command text. We only want
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// to do this one time for each command
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MySqlCommand commandToBatch = (MySqlCommand)command;
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if (commandToBatch.BatchableCommandText == null)
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commandToBatch.GetCommandTextForBatching();
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IDbCommand cloneCommand = (IDbCommand)((ICloneable)command).Clone();
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commandBatch.Add(cloneCommand);
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return commandBatch.Count - 1;
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}
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protected override int ExecuteBatch()
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{
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int recordsAffected = 0;
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int index = 0;
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while (index < commandBatch.Count)
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{
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MySqlCommand cmd = (MySqlCommand)commandBatch[index++];
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for (int index2 = index; index2 < commandBatch.Count; index2++,index++)
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{
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MySqlCommand cmd2 = (MySqlCommand)commandBatch[index2];
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if (cmd2.BatchableCommandText == null ||
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cmd2.CommandText != cmd.CommandText) break;
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cmd.AddToBatch(cmd2);
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}
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recordsAffected += cmd.ExecuteNonQuery();
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}
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return recordsAffected;
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}
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protected override void ClearBatch()
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{
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if (commandBatch.Count > 0)
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{
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MySqlCommand cmd = (MySqlCommand)commandBatch[0];
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if (cmd.Batch != null)
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cmd.Batch.Clear();
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}
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commandBatch.Clear();
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}
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protected override void TerminateBatching()
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{
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ClearBatch();
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commandBatch = null;
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}
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protected override IDataParameter GetBatchedParameter(int commandIdentifier, int parameterIndex)
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{
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return (IDataParameter)commandBatch[commandIdentifier].Parameters[parameterIndex];
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}
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#endregion
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/// <summary>
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/// Overridden. See <see cref="DbDataAdapter.CreateRowUpdatedEvent"/>.
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/// </summary>
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/// <param name="dataRow"></param>
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/// <param name="command"></param>
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/// <param name="statementType"></param>
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/// <param name="tableMapping"></param>
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/// <returns></returns>
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override protected RowUpdatedEventArgs CreateRowUpdatedEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping)
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{
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return new MySqlRowUpdatedEventArgs(dataRow, command, statementType, tableMapping);
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}
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/// <summary>
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/// Overridden. See <see cref="DbDataAdapter.CreateRowUpdatingEvent"/>.
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/// </summary>
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/// <param name="dataRow"></param>
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/// <param name="command"></param>
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/// <param name="statementType"></param>
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/// <param name="tableMapping"></param>
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/// <returns></returns>
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override protected RowUpdatingEventArgs CreateRowUpdatingEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping)
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{
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return new MySqlRowUpdatingEventArgs(dataRow, command, statementType, tableMapping);
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}
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/// <summary>
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/// Overridden. Raises the RowUpdating event.
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/// </summary>
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/// <param name="value">A MySqlRowUpdatingEventArgs that contains the event data.</param>
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override protected void OnRowUpdating(RowUpdatingEventArgs value)
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{
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if (RowUpdating != null)
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RowUpdating(this, (value as MySqlRowUpdatingEventArgs));
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}
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/// <summary>
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/// Overridden. Raises the RowUpdated event.
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/// </summary>
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/// <param name="value">A MySqlRowUpdatedEventArgs that contains the event data. </param>
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override protected void OnRowUpdated(RowUpdatedEventArgs value)
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{
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if (RowUpdated != null)
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RowUpdated(this, (value as MySqlRowUpdatedEventArgs));
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}
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}
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/// <summary>
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/// Represents the method that will handle the <see cref="MySqlDataAdapter.RowUpdating"/> event of a <see cref="MySqlDataAdapter"/>.
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/// </summary>
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public delegate void MySqlRowUpdatingEventHandler(object sender, MySqlRowUpdatingEventArgs e);
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/// <summary>
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/// Represents the method that will handle the <see cref="MySqlDataAdapter.RowUpdated"/> event of a <see cref="MySqlDataAdapter"/>.
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/// </summary>
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public delegate void MySqlRowUpdatedEventHandler(object sender, MySqlRowUpdatedEventArgs e);
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/// <summary>
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/// Provides data for the RowUpdating event. This class cannot be inherited.
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/// </summary>
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public sealed class MySqlRowUpdatingEventArgs : RowUpdatingEventArgs
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{
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/// <summary>
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/// Initializes a new instance of the MySqlRowUpdatingEventArgs class.
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/// </summary>
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/// <param name="row">The <see cref="DataRow"/> to
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/// <see cref="DbDataAdapter.Update(DataSet)"/>.</param>
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/// <param name="command">The <see cref="IDbCommand"/> to execute during <see cref="DbDataAdapter.Update(DataSet)"/>.</param>
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/// <param name="statementType">One of the <see cref="StatementType"/> values that specifies the type of query executed.</param>
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/// <param name="tableMapping">The <see cref="DataTableMapping"/> sent through an <see cref="DbDataAdapter.Update(DataSet)"/>.</param>
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public MySqlRowUpdatingEventArgs(DataRow row, IDbCommand command, StatementType statementType, DataTableMapping tableMapping)
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: base(row, command, statementType, tableMapping)
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{
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}
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/// <summary>
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/// Gets or sets the MySqlCommand to execute when performing the Update.
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/// </summary>
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new public MySqlCommand Command
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{
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get { return (MySqlCommand)base.Command; }
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set { base.Command = value; }
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}
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}
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/// <summary>
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/// Provides data for the RowUpdated event. This class cannot be inherited.
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/// </summary>
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public sealed class MySqlRowUpdatedEventArgs : RowUpdatedEventArgs
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{
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/// <summary>
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/// Initializes a new instance of the MySqlRowUpdatedEventArgs class.
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/// </summary>
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/// <param name="row">The <see cref="DataRow"/> sent through an <see cref="DbDataAdapter.Update(DataSet)"/>.</param>
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/// <param name="command">The <see cref="IDbCommand"/> executed when <see cref="DbDataAdapter.Update(DataSet)"/> is called.</param>
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/// <param name="statementType">One of the <see cref="StatementType"/> values that specifies the type of query executed.</param>
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/// <param name="tableMapping">The <see cref="DataTableMapping"/> sent through an <see cref="DbDataAdapter.Update(DataSet)"/>.</param>
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public MySqlRowUpdatedEventArgs(DataRow row, IDbCommand command, StatementType statementType, DataTableMapping tableMapping)
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: base(row, command, statementType, tableMapping)
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{
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}
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/// <summary>
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/// Gets or sets the MySqlCommand executed when Update is called.
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/// </summary>
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new public MySqlCommand Command
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{
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get { return (MySqlCommand)base.Command; }
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}
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}
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}
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