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// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
using System;
using System.Data;
using System.IO;
using MySql.Data.MySqlClient;
namespace MySql.Data.Types
{
internal struct MySqlString : IMySqlValue
{
private string mValue;
private bool isNull;
private MySqlDbType type;
public MySqlString(MySqlDbType type, bool isNull)
{
this.type = type;
this.isNull = isNull;
mValue = String.Empty;
}
public MySqlString(MySqlDbType type, string val)
{
this.type = type;
this.isNull = false;
mValue = val;
}
#region IMySqlValue Members
public bool IsNull
{
get { return isNull; }
}
MySqlDbType IMySqlValue.MySqlDbType
{
get { return type; }
}
DbType IMySqlValue.DbType
{
get { return DbType.String; }
}
object IMySqlValue.Value
{
get { return mValue; }
}
public string Value
{
get { return mValue; }
}
Type IMySqlValue.SystemType
{
get { return typeof(string); }
}
string IMySqlValue.MySqlTypeName
{
get { return type == MySqlDbType.Set ? "SET" : type == MySqlDbType.Enum ? "ENUM" : "VARCHAR"; }
}
void IMySqlValue.WriteValue(MySqlPacket packet, bool binary, object val, int length)
{
string v = val.ToString();
if (length > 0)
{
length = Math.Min(length, v.Length);
v = v.Substring(0, length);
}
if (binary)
packet.WriteLenString(v);
else
packet.WriteStringNoNull("'" + MySqlHelper.EscapeString(v) + "'");
}
IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
{
if (nullVal)
return new MySqlString(type, true);
string s = String.Empty;
if (length == -1)
s = packet.ReadLenString();
else
s = packet.ReadString(length);
MySqlString str = new MySqlString(type, s);
return str;
}
void IMySqlValue.SkipValue(MySqlPacket packet)
{
int len = (int)packet.ReadFieldLength();
packet.Position += len;
}
#endregion
internal static void SetDSInfo(DataTable dsTable)
{
string[] types = new string[] { "CHAR", "NCHAR", "VARCHAR", "NVARCHAR", "SET",
"ENUM", "TINYTEXT", "TEXT", "MEDIUMTEXT", "LONGTEXT" };
MySqlDbType[] dbtype = new MySqlDbType[] { MySqlDbType.String, MySqlDbType.String,
MySqlDbType.VarChar, MySqlDbType.VarChar, MySqlDbType.Set, MySqlDbType.Enum,
MySqlDbType.TinyText, MySqlDbType.Text, MySqlDbType.MediumText,
MySqlDbType.LongText };
// we use name indexing because this method will only be called
// when GetSchema is called for the DataSourceInformation
// collection and then it wil be cached.
for (int x = 0; x < types.Length; x++)
{
DataRow row = dsTable.NewRow();
row["TypeName"] = types[x];
row["ProviderDbType"] = dbtype[x];
row["ColumnSize"] = 0;
row["CreateFormat"] = x < 4 ? types[x] + "({0})" : types[x];
row["CreateParameters"] = x < 4 ? "size" : null;
row["DataType"] = "System.String";
row["IsAutoincrementable"] = false;
row["IsBestMatch"] = true;
row["IsCaseSensitive"] = false;
row["IsFixedLength"] = false;
row["IsFixedPrecisionScale"] = true;
row["IsLong"] = false;
row["IsNullable"] = true;
row["IsSearchable"] = true;
row["IsSearchableWithLike"] = true;
row["IsUnsigned"] = false;
row["MaximumScale"] = 0;
row["MinimumScale"] = 0;
row["IsConcurrencyType"] = DBNull.Value;
row["IsLiteralSupported"] = false;
row["LiteralPrefix"] = null;
row["LiteralSuffix"] = null;
row["NativeDataType"] = null;
dsTable.Rows.Add(row);
}
}
}
}
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