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LogLevel - Added support for TypeConverter
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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. | ||
// | ||
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namespace NLog.Attributes | ||
{ | ||
using System; | ||
using System.ComponentModel; | ||
using System.Globalization; | ||
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/// <summary> | ||
/// Support <see cref="NLog.LogLevel"/> implementation of <see cref="IConvertible"/> | ||
/// </summary> | ||
public class LogLevelTypeConverter : TypeConverter | ||
{ | ||
/// <inheritdoc/> | ||
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) | ||
{ | ||
return IsSupportedType(sourceType) || base.CanConvertFrom(context, sourceType); | ||
} | ||
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/// <inheritdoc/> | ||
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) | ||
{ | ||
TypeCode casted = Convert.GetTypeCode(value); | ||
switch (casted) | ||
{ | ||
case TypeCode.String: | ||
return LogLevel.FromString(value.ToString()); | ||
case TypeCode.Int16: | ||
return LogLevel.FromOrdinal(Convert.ToInt16(value)); | ||
case TypeCode.UInt16: | ||
return LogLevel.FromOrdinal(Convert.ToUInt16(value)); | ||
case TypeCode.Int32: | ||
return LogLevel.FromOrdinal(Convert.ToInt32(value)); | ||
case TypeCode.UInt32: | ||
return LogLevel.FromOrdinal((int)Convert.ToUInt32(value)); | ||
case TypeCode.Int64: | ||
return LogLevel.FromOrdinal((int)Convert.ToInt64(value)); | ||
case TypeCode.UInt64: | ||
return LogLevel.FromOrdinal((int)Convert.ToUInt64(value)); | ||
default: | ||
return base.ConvertFrom(context, culture, value); | ||
} | ||
} | ||
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/// <inheritdoc/> | ||
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) | ||
{ | ||
return IsSupportedType(destinationType) || base.CanConvertTo(context, destinationType); | ||
} | ||
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/// <inheritdoc/> | ||
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) | ||
{ | ||
var casted = value as LogLevel; | ||
return destinationType == typeof(string) && casted != null | ||
? casted.ToString() | ||
: base.ConvertTo(context, culture, casted?.Ordinal ?? value, destinationType); | ||
} | ||
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private static bool IsSupportedType(Type sourceType) | ||
{ | ||
return sourceType == typeof(string) || | ||
sourceType == typeof(short) || | ||
sourceType == typeof(ushort) || | ||
sourceType == typeof(int) || | ||
sourceType == typeof(uint) || | ||
sourceType == typeof(long) || | ||
sourceType == typeof(ulong); | ||
} | ||
} | ||
} |
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