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// Copyright (c) 2008 MySQL AB, 2008-2010 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.Data.Metadata.Edm;
using System.Data.Common.CommandTrees;
using System.Collections.Generic;
using System.Globalization;
using System.Diagnostics;
namespace MySql.Data.Entity
{
class Metadata
{
public static string GetNumericLiteral(PrimitiveTypeKind type, object value)
{
switch (type)
{
case PrimitiveTypeKind.Byte:
case PrimitiveTypeKind.Int16:
case PrimitiveTypeKind.Int32:
case PrimitiveTypeKind.Int64:
case PrimitiveTypeKind.SByte:
return value.ToString();
case PrimitiveTypeKind.Double:
return ((double)value).ToString("R", CultureInfo.InvariantCulture);
case PrimitiveTypeKind.Single:
return ((float)value).ToString("R", CultureInfo.InvariantCulture);
case PrimitiveTypeKind.Decimal:
return ((decimal)value).ToString(CultureInfo.InvariantCulture);
}
return null;
}
public static bool IsNumericType(TypeUsage typeUsage)
{
PrimitiveType pt = (PrimitiveType)typeUsage.EdmType;
switch (pt.PrimitiveTypeKind)
{
case PrimitiveTypeKind.Byte:
case PrimitiveTypeKind.Double:
case PrimitiveTypeKind.Single:
case PrimitiveTypeKind.Int16:
case PrimitiveTypeKind.Int32:
case PrimitiveTypeKind.Int64:
case PrimitiveTypeKind.SByte:
return true;
default:
return false;
}
}
public static DbType GetDbType(TypeUsage typeUsage)
{
PrimitiveType pt = (PrimitiveType)typeUsage.EdmType;
switch (pt.PrimitiveTypeKind)
{
case PrimitiveTypeKind.Binary: return DbType.Binary;
case PrimitiveTypeKind.Boolean: return DbType.Boolean;
case PrimitiveTypeKind.Byte: return DbType.Byte;
case PrimitiveTypeKind.DateTime: return DbType.DateTime;
case PrimitiveTypeKind.DateTimeOffset: return DbType.DateTime;
case PrimitiveTypeKind.Decimal: return DbType.Decimal;
case PrimitiveTypeKind.Double: return DbType.Double;
case PrimitiveTypeKind.Single: return DbType.Single;
case PrimitiveTypeKind.Guid: return DbType.Guid;
case PrimitiveTypeKind.Int16: return DbType.Int16;
case PrimitiveTypeKind.Int32: return DbType.Int32;
case PrimitiveTypeKind.Int64: return DbType.Int64;
case PrimitiveTypeKind.SByte: return DbType.SByte;
case PrimitiveTypeKind.String: return DbType.String;
case PrimitiveTypeKind.Time: return DbType.Time;
// case PrimitiveTypeKind.UInt16: return DbType.UInt16;
// case PrimitiveTypeKind.UInt32: return DbType.UInt32;
// case PrimitiveTypeKind.UInt64: return DbType.UInt64;
default:
throw new InvalidOperationException(
string.Format("Unknown PrimitiveTypeKind {0}", pt.PrimitiveTypeKind));
}
}
public static object NormalizeValue(TypeUsage type, object value)
{
PrimitiveType pt = (PrimitiveType)type.EdmType;
if (pt.PrimitiveTypeKind != PrimitiveTypeKind.DateTimeOffset) return value;
DateTimeOffset dto = (DateTimeOffset)value;
DateTime dt = dto.DateTime;
if (dt.Year < 1970)
return new DateTime(1970, 1, 1, 0, 0, 1);
return dt;
}
public static ParameterDirection ModeToDirection(ParameterMode mode)
{
switch (mode)
{
case ParameterMode.In: return ParameterDirection.Input;
case ParameterMode.Out: return ParameterDirection.Output;
case ParameterMode.InOut: return ParameterDirection.InputOutput;
default:
Debug.Assert(mode == ParameterMode.ReturnValue);
return ParameterDirection.ReturnValue;
}
}
public static bool IsComparisonOperator(string op)
{
switch (op)
{
case "=":
case "<":
case ">":
case "<=":
case ">=":
case "!=": return true;
default: return false;
}
}
public static string GetOperator(DbExpressionKind expressionKind)
{
switch (expressionKind)
{
case DbExpressionKind.Equals: return "=";
case DbExpressionKind.LessThan: return "<";
case DbExpressionKind.GreaterThan: return ">";
case DbExpressionKind.LessThanOrEquals: return "<=";
case DbExpressionKind.GreaterThanOrEquals: return ">=";
case DbExpressionKind.NotEquals: return "!=";
case DbExpressionKind.LeftOuterJoin: return "LEFT OUTER JOIN";
case DbExpressionKind.InnerJoin: return "INNER JOIN";
case DbExpressionKind.CrossJoin: return "CROSS JOIN";
case DbExpressionKind.FullOuterJoin: return "OUTER JOIN";
}
throw new NotSupportedException("expression kind not supported");
}
internal static IList<EdmProperty> GetProperties(EdmType type)
{
if (type is EntityType)
return ((EntityType)type).Properties;
if (type is ComplexType)
return ((ComplexType)type).Properties;
if (type is RowType)
return ((RowType)type).Properties;
throw new NotSupportedException();
}
internal static T TryGetValueMetadataProperty<T>(MetadataItem mi, string name)
{
MetadataProperty property;
bool exists = mi.MetadataProperties.TryGetValue(name, true, out property);
if (exists) return (T)property.Value;
return default(T);
}
}
}
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