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714 lines
26 KiB
714 lines
26 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 MySql.Data.Types;
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using System.ComponentModel;
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using System.Globalization;
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using System.Reflection;
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using System.Text;
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using System.Collections;
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#if !CF
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using System.ComponentModel.Design.Serialization;
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#endif
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namespace MySql.Data.MySqlClient
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{
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/// <summary>
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/// Represents a parameter to a <see cref="MySqlCommand"/>, and optionally, its mapping to <see cref="DataSet"/> columns. This class cannot be inherited.
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/// </summary>
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#if !CF
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[TypeConverter(typeof(MySqlParameterConverter))]
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#endif
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public sealed class MySqlParameter : DbParameter, IDataParameter, IDbDataParameter, ICloneable
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{
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private const int UNSIGNED_MASK = 0x8000;
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private object paramValue;
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private ParameterDirection direction = ParameterDirection.Input;
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private bool isNullable;
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private string paramName;
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private string sourceColumn;
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private DataRowVersion sourceVersion = DataRowVersion.Current;
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private int size;
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private byte precision;
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private byte scale;
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private MySqlDbType mySqlDbType;
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private DbType dbType;
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private bool inferType;
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private bool sourceColumnNullMapping;
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private MySqlParameterCollection collection;
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IMySqlValue valueObject;
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private Encoding encoding;
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private IList possibleValues;
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the MySqlParameter class.
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/// </summary>
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public MySqlParameter()
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{
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inferType = true;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name and a value of the new MySqlParameter.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="value">An <see cref="Object"/> that is the value of the <see cref="MySqlParameter"/>. </param>
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public MySqlParameter(string parameterName, object value)
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: this()
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{
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ParameterName = parameterName;
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Value = value;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name and the data type.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlDbType"/> values. </param>
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public MySqlParameter(string parameterName, MySqlDbType dbType)
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: this(parameterName, null)
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{
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MySqlDbType = dbType;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name, the <see cref="MySqlDbType"/>, and the size.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlDbType"/> values. </param>
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/// <param name="size">The length of the parameter. </param>
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public MySqlParameter(string parameterName, MySqlDbType dbType, int size)
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: this(parameterName, dbType)
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{
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this.size = size;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name, the <see cref="MySqlDbType"/>, the size, and the source column name.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlDbType"/> values. </param>
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/// <param name="size">The length of the parameter. </param>
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/// <param name="sourceColumn">The name of the source column. </param>
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public MySqlParameter(string parameterName, MySqlDbType dbType, int size, string sourceColumn)
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:
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this(parameterName, dbType)
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{
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this.size = size;
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direction = ParameterDirection.Input;
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this.sourceColumn = sourceColumn;
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sourceVersion = DataRowVersion.Current;
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}
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internal MySqlParameter(string name, MySqlDbType type, ParameterDirection dir, string col,
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DataRowVersion ver, object val)
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: this(name, type)
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{
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direction = dir;
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sourceColumn = col;
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sourceVersion = ver;
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Value = val;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name, the type of the parameter, the size of the parameter, a <see cref="ParameterDirection"/>, the precision of the parameter, the scale of the parameter, the source column, a <see cref="DataRowVersion"/> to use, and the value of the parameter.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlDbType"/> values. </param>
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/// <param name="size">The length of the parameter. </param>
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/// <param name="direction">One of the <see cref="ParameterDirection"/> values. </param>
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/// <param name="isNullable">true if the value of the field can be null, otherwise false. </param>
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/// <param name="precision">The total number of digits to the left and right of the decimal point to which <see cref="MySqlParameter.Value"/> is resolved.</param>
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/// <param name="scale">The total number of decimal places to which <see cref="MySqlParameter.Value"/> is resolved. </param>
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/// <param name="sourceColumn">The name of the source column. </param>
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/// <param name="sourceVersion">One of the <see cref="DataRowVersion"/> values. </param>
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/// <param name="value">An <see cref="Object"/> that is the value of the <see cref="MySqlParameter"/>. </param>
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/// <exception cref="ArgumentException"/>
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public MySqlParameter(string parameterName, MySqlDbType dbType, int size, ParameterDirection direction,
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bool isNullable, byte precision, byte scale, string sourceColumn,
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DataRowVersion sourceVersion,
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object value)
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: this(parameterName, dbType, size, sourceColumn)
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{
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this.direction = direction;
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this.sourceVersion = sourceVersion;
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Value = value;
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}
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#endregion
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#region Properties
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internal MySqlParameterCollection Collection
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{
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get { return collection; }
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set { collection = value; }
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}
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internal bool TypeHasBeenSet
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{
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get { return inferType == false; }
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}
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internal Encoding Encoding
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{
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get { return encoding; }
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set { encoding = value; }
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}
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/// <summary>
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/// Gets or sets the <see cref="DbType"/> of the parameter.
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/// </summary>
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public override DbType DbType
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{
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get { return dbType; }
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set
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{
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SetDbType(value);
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inferType = false;
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter.
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/// As of MySql version 4.1 and earlier, input-only is the only valid choice.
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/// </summary>
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#if !CF
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[Category("Data")]
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#endif
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public override ParameterDirection Direction
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{
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get { return direction; }
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set { direction = value; }
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}
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/// <summary>
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/// Gets or sets a value indicating whether the parameter accepts null values.
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/// </summary>
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#if !CF
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[Browsable(false)]
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#endif
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public override Boolean IsNullable
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{
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get { return isNullable; }
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set { isNullable = value; }
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}
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/// <summary>
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/// Gets or sets the MySqlDbType of the parameter.
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/// </summary>
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#if !CF
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[Category("Data")]
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[DbProviderSpecificTypeProperty(true)]
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#endif
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public MySqlDbType MySqlDbType
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{
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get { return mySqlDbType; }
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set
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{
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SetMySqlDbType(value);
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inferType = false;
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}
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}
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/// <summary>
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/// Gets or sets the name of the MySqlParameter.
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/// </summary>
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#if !CF
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[Category("Misc")]
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#endif
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public override String ParameterName
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{
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get { return paramName; }
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set
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{
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if (collection != null)
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collection.ParameterNameChanged(this, paramName, value);
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paramName = value;
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}
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}
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/// <summary>
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/// Gets or sets the maximum number of digits used to represent the <see cref="Value"/> property.
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/// </summary>
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#if !CF
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[Category("Data")]
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#endif
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public byte Precision
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{
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get { return precision; }
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set { precision = value; }
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}
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/// <summary>
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/// Gets or sets the number of decimal places to which <see cref="Value"/> is resolved.
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/// </summary>
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#if !CF
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[Category("Data")]
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#endif
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public byte Scale
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{
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get { return scale; }
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set { scale = value; }
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}
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/// <summary>
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/// Gets or sets the maximum size, in bytes, of the data within the column.
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/// </summary>
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#if !CF
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[Category("Data")]
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#endif
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public override int Size
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{
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get { return size; }
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set { size = value; }
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}
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/// <summary>
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/// Gets or sets the name of the source column that is mapped to the <see cref="DataSet"/> and used for loading or returning the <see cref="Value"/>.
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/// </summary>
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#if !CF
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[Category("Data")]
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#endif
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public override String SourceColumn
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{
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get { return sourceColumn; }
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set { sourceColumn = value; }
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}
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/// <summary>
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/// Gets or sets the <see cref="DataRowVersion"/> to use when loading <see cref="Value"/>.
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/// </summary>
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#if !CF
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[Category("Data")]
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#endif
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public override DataRowVersion SourceVersion
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{
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get { return sourceVersion; }
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set { sourceVersion = value; }
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}
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/// <summary>
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/// Gets or sets the value of the parameter.
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/// </summary>
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#if !CF
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[TypeConverter(typeof (StringConverter))]
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[Category("Data")]
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#endif
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public override object Value
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{
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get { return paramValue; }
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set
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{
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paramValue = value;
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byte[] valueAsByte = value as byte[];
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string valueAsString = value as string;
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if (valueAsByte != null)
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size = valueAsByte.Length;
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else if (valueAsString != null)
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size = valueAsString.Length;
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if (inferType)
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SetTypeFromValue();
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}
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}
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private IMySqlValue ValueObject
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{
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get { return valueObject; }
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}
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/// <summary>
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/// Returns the possible values for this parameter if this parameter is of type
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/// SET or ENUM. Returns null otherwise.
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/// </summary>
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public IList PossibleValues
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{
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get { return possibleValues; }
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internal set { possibleValues = value; }
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}
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#endregion
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/// <summary>
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/// Overridden. Gets a string containing the <see cref="ParameterName"/>.
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/// </summary>
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/// <returns></returns>
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public override string ToString()
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{
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return paramName;
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}
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internal int GetPSType()
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{
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switch (mySqlDbType)
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{
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case MySqlDbType.Bit:
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return (int) MySqlDbType.Int64 | UNSIGNED_MASK;
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case MySqlDbType.UByte:
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return (int) MySqlDbType.Byte | UNSIGNED_MASK;
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case MySqlDbType.UInt64:
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return (int) MySqlDbType.Int64 | UNSIGNED_MASK;
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case MySqlDbType.UInt32:
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return (int) MySqlDbType.Int32 | UNSIGNED_MASK;
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case MySqlDbType.UInt24:
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return (int) MySqlDbType.Int32 | UNSIGNED_MASK;
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case MySqlDbType.UInt16:
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return (int) MySqlDbType.Int16 | UNSIGNED_MASK;
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default:
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return (int) mySqlDbType;
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}
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}
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internal void Serialize(MySqlPacket packet, bool binary, MySqlConnectionStringBuilder settings)
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{
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if (!binary && (paramValue == null || paramValue == DBNull.Value))
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packet.WriteStringNoNull("NULL");
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else
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{
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if (ValueObject.MySqlDbType == MySqlDbType.Guid)
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{
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MySqlGuid g = (MySqlGuid)ValueObject;
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g.OldGuids = settings.OldGuids;
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valueObject = g;
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}
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ValueObject.WriteValue(packet, binary, paramValue, size);
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}
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}
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private void SetMySqlDbType(MySqlDbType mysql_dbtype)
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{
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mySqlDbType = mysql_dbtype;
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valueObject = MySqlField.GetIMySqlValue(mySqlDbType);
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switch (mySqlDbType)
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{
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case MySqlDbType.Decimal:
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dbType = DbType.Decimal;
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break;
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case MySqlDbType.Byte:
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dbType = DbType.SByte;
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break;
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case MySqlDbType.UByte:
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dbType = DbType.Byte;
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break;
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case MySqlDbType.Int16:
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dbType = DbType.Int16;
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break;
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case MySqlDbType.UInt16:
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dbType = DbType.UInt16;
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break;
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case MySqlDbType.Int24:
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case MySqlDbType.Int32:
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dbType = DbType.Int32;
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break;
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case MySqlDbType.UInt24:
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case MySqlDbType.UInt32:
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dbType = DbType.UInt32;
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break;
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case MySqlDbType.Int64:
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dbType = DbType.Int64;
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break;
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case MySqlDbType.UInt64:
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dbType = DbType.UInt64;
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break;
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case MySqlDbType.Bit:
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dbType = DbType.UInt64;
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break;
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case MySqlDbType.Float:
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dbType = DbType.Single;
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break;
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case MySqlDbType.Double:
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dbType = DbType.Double;
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break;
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case MySqlDbType.Timestamp:
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case MySqlDbType.DateTime:
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dbType = DbType.DateTime;
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break;
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case MySqlDbType.Date:
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case MySqlDbType.Newdate:
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case MySqlDbType.Year:
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dbType = DbType.Date;
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break;
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case MySqlDbType.Time:
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dbType = DbType.Time;
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break;
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case MySqlDbType.Enum:
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case MySqlDbType.Set:
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case MySqlDbType.VarChar:
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dbType = DbType.String;
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break;
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case MySqlDbType.TinyBlob:
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case MySqlDbType.MediumBlob:
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case MySqlDbType.LongBlob:
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case MySqlDbType.Blob:
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dbType = DbType.Object;
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break;
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case MySqlDbType.String:
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dbType = DbType.StringFixedLength;
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break;
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case MySqlDbType.Guid:
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dbType = DbType.Guid;
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break;
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}
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}
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private void SetDbType(DbType db_type)
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{
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dbType = db_type;
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switch (dbType)
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{
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case DbType.Guid:
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mySqlDbType = MySqlDbType.Guid;
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break;
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case DbType.AnsiString:
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case DbType.String:
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mySqlDbType = MySqlDbType.VarChar;
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break;
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case DbType.AnsiStringFixedLength:
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case DbType.StringFixedLength:
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mySqlDbType = MySqlDbType.String;
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break;
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case DbType.Boolean:
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case DbType.Byte:
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mySqlDbType = MySqlDbType.UByte;
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break;
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case DbType.SByte:
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mySqlDbType = MySqlDbType.Byte;
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break;
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case DbType.Date:
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mySqlDbType = MySqlDbType.Date;
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break;
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case DbType.DateTime:
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mySqlDbType = MySqlDbType.DateTime;
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break;
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case DbType.Time:
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mySqlDbType = MySqlDbType.Time;
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break;
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case DbType.Single:
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mySqlDbType = MySqlDbType.Float;
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break;
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case DbType.Double:
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mySqlDbType = MySqlDbType.Double;
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break;
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case DbType.Int16:
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mySqlDbType = MySqlDbType.Int16;
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break;
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case DbType.UInt16:
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mySqlDbType = MySqlDbType.UInt16;
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break;
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case DbType.Int32:
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mySqlDbType = MySqlDbType.Int32;
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break;
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case DbType.UInt32:
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mySqlDbType = MySqlDbType.UInt32;
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break;
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case DbType.Int64:
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mySqlDbType = MySqlDbType.Int64;
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break;
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case DbType.UInt64:
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mySqlDbType = MySqlDbType.UInt64;
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break;
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case DbType.Decimal:
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case DbType.Currency:
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mySqlDbType = MySqlDbType.Decimal;
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break;
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case DbType.Object:
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case DbType.VarNumeric:
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case DbType.Binary:
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default:
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mySqlDbType = MySqlDbType.Blob;
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break;
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|
}
|
|
valueObject = MySqlField.GetIMySqlValue(mySqlDbType);
|
|
}
|
|
|
|
private void SetTypeFromValue()
|
|
{
|
|
if (paramValue == null || paramValue == DBNull.Value) return;
|
|
|
|
if (paramValue is Guid)
|
|
DbType = DbType.Guid;
|
|
else if (paramValue is TimeSpan)
|
|
DbType = DbType.Time;
|
|
else if (paramValue is bool)
|
|
DbType = DbType.Byte;
|
|
else
|
|
{
|
|
TypeCode tc = Type.GetTypeCode(paramValue.GetType());
|
|
switch (tc)
|
|
{
|
|
case TypeCode.SByte:
|
|
DbType = DbType.SByte;
|
|
break;
|
|
case TypeCode.Byte:
|
|
DbType = DbType.Byte;
|
|
break;
|
|
case TypeCode.Int16:
|
|
DbType = DbType.Int16;
|
|
break;
|
|
case TypeCode.UInt16:
|
|
DbType = DbType.UInt16;
|
|
break;
|
|
case TypeCode.Int32:
|
|
DbType = DbType.Int32;
|
|
break;
|
|
case TypeCode.UInt32:
|
|
DbType = DbType.UInt32;
|
|
break;
|
|
case TypeCode.Int64:
|
|
DbType = DbType.Int64;
|
|
break;
|
|
case TypeCode.UInt64:
|
|
DbType = DbType.UInt64;
|
|
break;
|
|
case TypeCode.DateTime:
|
|
DbType = DbType.DateTime;
|
|
break;
|
|
case TypeCode.String:
|
|
DbType = DbType.String;
|
|
break;
|
|
case TypeCode.Single:
|
|
DbType = DbType.Single;
|
|
break;
|
|
case TypeCode.Double:
|
|
DbType = DbType.Double;
|
|
break;
|
|
case TypeCode.Decimal:
|
|
DbType = DbType.Decimal;
|
|
break;
|
|
case TypeCode.Object:
|
|
default:
|
|
DbType = DbType.Object;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#region ICloneable
|
|
|
|
public MySqlParameter Clone()
|
|
{
|
|
MySqlParameter clone = new MySqlParameter(paramName, mySqlDbType, direction,
|
|
sourceColumn, sourceVersion, paramValue);
|
|
// if we have not had our type set yet then our clone should not either
|
|
clone.inferType = inferType;
|
|
return clone;
|
|
}
|
|
|
|
object ICloneable.Clone()
|
|
{
|
|
return this.Clone();
|
|
}
|
|
|
|
#endregion
|
|
|
|
/// <summary>
|
|
/// Resets the <b>DbType</b> property to its original settings.
|
|
/// </summary>
|
|
public override void ResetDbType()
|
|
{
|
|
inferType = true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sets or gets a value which indicates whether the source column is nullable.
|
|
/// This allows <see cref="DbCommandBuilder"/> to correctly generate Update statements
|
|
/// for nullable columns.
|
|
/// </summary>
|
|
public override bool SourceColumnNullMapping
|
|
{
|
|
get { return sourceColumnNullMapping; }
|
|
set { sourceColumnNullMapping = value; }
|
|
}
|
|
|
|
// this method is pretty dumb but we want it to be fast. it doesn't return size based
|
|
// on value and type but just on the value.
|
|
internal long EstimatedSize()
|
|
{
|
|
if (Value == null || Value == DBNull.Value)
|
|
return 4; // size of NULL
|
|
if (Value is byte[])
|
|
return (Value as byte[]).Length;
|
|
if (Value is string)
|
|
return (Value as string).Length * 4; // account for UTF-8 (yeah I know)
|
|
if (Value is decimal || Value is float)
|
|
return 64;
|
|
return 32;
|
|
}
|
|
}
|
|
|
|
#if !CF
|
|
internal class MySqlParameterConverter : TypeConverter
|
|
{
|
|
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
|
|
{
|
|
if (destinationType == typeof(InstanceDescriptor))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Always call the base to see if it can perform the conversion.
|
|
return base.CanConvertTo(context, destinationType);
|
|
}
|
|
|
|
public override object ConvertTo(ITypeDescriptorContext context,
|
|
CultureInfo culture, object value, Type destinationType)
|
|
{
|
|
if (destinationType == typeof(InstanceDescriptor))
|
|
{
|
|
ConstructorInfo ci = typeof(MySqlParameter).GetConstructor(
|
|
new Type[]
|
|
{
|
|
typeof (string), typeof (MySqlDbType), typeof (int), typeof (ParameterDirection),
|
|
typeof (bool), typeof (byte), typeof (byte), typeof (string), typeof (DataRowVersion),
|
|
typeof (object)
|
|
});
|
|
MySqlParameter p = (MySqlParameter)value;
|
|
return new InstanceDescriptor(ci, new object[]
|
|
{
|
|
p.ParameterName, p.DbType, p.Size, p.Direction,
|
|
p.IsNullable, p.Precision,
|
|
p.Scale, p.SourceColumn, p.SourceVersion, p.Value
|
|
});
|
|
}
|
|
|
|
// Always call base, even if you can't convert.
|
|
return base.ConvertTo(context, culture, value, destinationType);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|