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DatabaseParameterInfo.cs
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DatabaseParameterInfo.cs
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//
// Copyright (c) 2004-2019 Jaroslaw Kowalski <jaak@jkowalski.net>, Kim Christensen, Julian Verdurmen
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * Neither the name of Jaroslaw Kowalski nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
#if !SILVERLIGHT && !__IOS__ && !__ANDROID__
namespace NLog.Targets
{
using System;
using System.ComponentModel;
using System.Data;
using System.Globalization;
using System.Reflection;
using NLog.Common;
using NLog.Config;
using NLog.Internal;
using NLog.Layouts;
/// <summary>
/// Represents a parameter to a Database target.
/// </summary>
[NLogConfigurationItem]
public class DatabaseParameterInfo
{
/// <summary>
/// Initializes a new instance of the <see cref="DatabaseParameterInfo" /> class.
/// </summary>
public DatabaseParameterInfo()
: this(null, null)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="DatabaseParameterInfo" /> class.
/// </summary>
/// <param name="parameterName">Name of the parameter.</param>
/// <param name="parameterLayout">The parameter layout.</param>
public DatabaseParameterInfo(string parameterName, Layout parameterLayout)
{
Name = parameterName;
Layout = parameterLayout;
}
/// <summary>
/// Gets or sets the database parameter name.
/// </summary>
/// <docgen category='Parameter Options' order='0' />
[RequiredParameter]
public string Name { get; set; }
/// <summary>
/// Gets or sets the layout that should be use to calculate the value for the parameter.
/// </summary>
/// <docgen category='Parameter Options' order='1' />
[RequiredParameter]
public Layout Layout { get; set; }
/// <summary>
/// Gets or sets the database parameter DbType.
/// </summary>
/// <docgen category='Parameter Options' order='2' />
[DefaultValue(null)]
public string DbType { get; set; }
/// <summary>
/// Gets or sets the database parameter size.
/// </summary>
/// <docgen category='Parameter Options' order='3' />
[DefaultValue(0)]
public int Size { get; set; }
/// <summary>
/// Gets or sets the database parameter precision.
/// </summary>
/// <docgen category='Parameter Options' order='4' />
[DefaultValue(0)]
public byte Precision { get; set; }
/// <summary>
/// Gets or sets the database parameter scale.
/// </summary>
/// <docgen category='Parameter Options' order='5' />
[DefaultValue(0)]
public byte Scale { get; set; }
/// <summary>
/// Gets or sets the type of the parameter.
/// </summary>
/// <docgen category='Parameter Options' order='6' />
[DefaultValue(typeof(string))]
public Type ParameterType { get => _parameterType ?? _cachedDbTypeSetter?.ParameterType ?? typeof(string); set => _parameterType = value; }
private Type _parameterType;
/// <summary>
/// Gets or sets convert format of the database parameter value .
/// </summary>
/// <docgen category='Parameter Options' order='8' />
[DefaultValue(null)]
public string Format { get; set; }
/// <summary>
/// Gets or sets the culture used for parsing parameter string-value for type-conversion
/// </summary>
/// <docgen category='Parameter Options' order='9' />
[DefaultValue(null)]
public CultureInfo Culture { get; set; }
internal bool SetDbType(IDbDataParameter dbParameter)
{
if (!string.IsNullOrEmpty(DbType))
{
if (_cachedDbTypeSetter == null || !_cachedDbTypeSetter.IsValid(dbParameter.GetType(), DbType))
{
_cachedDbTypeSetter = new DbTypeSetter(dbParameter.GetType(), DbType);
}
return _cachedDbTypeSetter.SetDbType(dbParameter);
}
return true; // DbType not in use
}
DbTypeSetter _cachedDbTypeSetter;
class DbTypeSetter
{
private readonly Type _dbPropertyInfoType;
private readonly string _dbTypeName;
private readonly PropertyInfo _dbTypeSetter;
private readonly Enum _dbTypeValue;
private Action<IDbDataParameter> _dbTypeSetterFast;
public Type ParameterType { get; }
public DbTypeSetter(Type dbParameterType, string dbTypeName)
{
_dbPropertyInfoType = dbParameterType;
_dbTypeName = dbTypeName;
if (!StringHelpers.IsNullOrWhiteSpace(dbTypeName))
{
string[] dbTypeNames = dbTypeName.SplitAndTrimTokens('.');
if (dbTypeNames.Length > 1 && !string.Equals(dbTypeNames[0], nameof(System.Data.DbType), StringComparison.OrdinalIgnoreCase))
{
PropertyInfo propInfo = dbParameterType.GetProperty(dbTypeNames[0], BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance);
if (propInfo != null)
{
var enumConverter = (IEnumTypeConverter)Activator.CreateInstance(typeof(EnumTypeConverter<>).MakeGenericType(propInfo.PropertyType));
if (enumConverter.TryParseEnum(dbTypeNames[1], out Enum enumType))
{
_dbTypeSetter = propInfo;
_dbTypeValue = enumType;
ParameterType = TryParseParameterType(enumType.ToString());
}
}
}
else
{
if (ConversionHelpers.TryParse(dbTypeNames[dbTypeNames.Length - 1], out DbType dbType))
{
_dbTypeValue = dbType;
ParameterType = TryLookupParameterType(dbType);
_dbTypeSetterFast = (p) => p.DbType = dbType;
}
}
}
}
private static Type TryLookupParameterType(DbType dbType)
{
switch (dbType)
{
case System.Data.DbType.AnsiString:
case System.Data.DbType.String:
case System.Data.DbType.AnsiStringFixedLength:
case System.Data.DbType.StringFixedLength:
case System.Data.DbType.Xml:
return typeof(string);
case System.Data.DbType.Byte:
return typeof(byte);
case System.Data.DbType.SByte:
return typeof(sbyte);
case System.Data.DbType.Boolean:
return typeof(bool);
case System.Data.DbType.Date:
case System.Data.DbType.DateTime:
case System.Data.DbType.DateTime2:
return typeof(DateTime);
case System.Data.DbType.DateTimeOffset:
return typeof(DateTimeOffset);
case System.Data.DbType.Decimal:
case System.Data.DbType.VarNumeric:
case System.Data.DbType.Currency:
return typeof(decimal);
case System.Data.DbType.Double:
return typeof(double);
case System.Data.DbType.Guid:
return typeof(Guid);
case System.Data.DbType.Int16:
return typeof(short);
case System.Data.DbType.Int32:
return typeof(int);
case System.Data.DbType.Int64:
return typeof(long);
case System.Data.DbType.Object:
return typeof(object);
case System.Data.DbType.Single:
return typeof(float);
case System.Data.DbType.Time:
return typeof(TimeSpan);
case System.Data.DbType.UInt16:
return typeof(ushort);
case System.Data.DbType.UInt32:
return typeof(uint);
case System.Data.DbType.UInt64:
return typeof(ulong);
}
return null;
}
private Type TryParseParameterType(string dbTypeString)
{
if (dbTypeString.IndexOf("Date", StringComparison.OrdinalIgnoreCase) >= 0)
return typeof(DateTime);
else if (dbTypeString.IndexOf("Timestamp", StringComparison.OrdinalIgnoreCase) >= 0)
return typeof(DateTime);
else if (dbTypeString.IndexOf("Double", StringComparison.OrdinalIgnoreCase) >= 0)
return typeof(double);
else if (dbTypeString.IndexOf("Decimal", StringComparison.OrdinalIgnoreCase) >= 0)
return typeof(decimal);
else if (dbTypeString.IndexOf("Bool", StringComparison.OrdinalIgnoreCase) >= 0)
return typeof(bool);
else if (dbTypeString.IndexOf("Guid", StringComparison.OrdinalIgnoreCase) >= 0)
return typeof(Guid);
return null;
}
public bool IsValid(Type dbParameterType, string dbTypeName)
{
if (ReferenceEquals(_dbPropertyInfoType, dbParameterType) && ReferenceEquals(_dbTypeName, dbTypeName))
{
if (_dbTypeSetterFast == null && _dbTypeSetter != null && _dbTypeValue != null)
{
var dbTypeSetterLambda = ReflectionHelpers.CreateLateBoundMethod(_dbTypeSetter.GetSetMethod());
var dbTypeSetterParams = new object[] { _dbTypeValue };
_dbTypeSetterFast = (p) => dbTypeSetterLambda.Invoke(p, dbTypeSetterParams);
}
return true;
}
return false;
}
public bool SetDbType(IDbDataParameter dbParameter)
{
if (_dbTypeSetterFast != null)
{
_dbTypeSetterFast.Invoke(dbParameter);
return true;
}
else if (_dbTypeSetter != null && _dbTypeValue != null)
{
_dbTypeSetter.SetValue(dbParameter, _dbTypeValue, null);
return true;
}
return false;
}
interface IEnumTypeConverter
{
bool TryParseEnum(string value, out Enum enumValue);
}
class EnumTypeConverter<TEnum> : IEnumTypeConverter where TEnum : struct
{
bool IEnumTypeConverter.TryParseEnum(string value, out Enum enumValue)
{
TEnum enumValueT;
if (ConversionHelpers.TryParse(value, out enumValueT))
{
enumValue = enumValueT as Enum;
return enumValue != null;
}
enumValue = null;
return false;
}
}
}
}
}
#endif