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// Copyright 2009-2022 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System;
namespace CsvHelper.Configuration.Attributes
{
/// <summary>
/// The string values used to represent null when converting.
/// </summary>
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = false, Inherited = true)]
public class NullValuesAttribute : Attribute, IMemberMapper, IParameterMapper
{
/// <summary>
/// Gets the null values.
/// </summary>
public string[] NullValues { get; private set; }
/// <summary>
/// The string values used to represent null when converting.
/// </summary>
/// <param name="nullValue">The null values.</param>
public NullValuesAttribute(string nullValue)
{
NullValues = new string[] { nullValue };
}
/// <summary>
/// The string values used to represent null when converting.
/// </summary>
/// <param name="nullValues">The null values.</param>
public NullValuesAttribute(params string[] nullValues)
{
NullValues = nullValues;
}
/// <inheritdoc />
public void ApplyTo(MemberMap memberMap)
{
memberMap.Data.TypeConverterOptions.NullValues.Clear();
memberMap.Data.TypeConverterOptions.NullValues.AddRange(NullValues);
}
/// <inheritdoc />
public void ApplyTo(ParameterMap parameterMap)
{
parameterMap.Data.TypeConverterOptions.NullValues.Clear();
parameterMap.Data.TypeConverterOptions.NullValues.AddRange(NullValues);
}
}
}
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