/
MaxLengthAttributeConvention.cs
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/
MaxLengthAttributeConvention.cs
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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
namespace System.Data.Entity.ModelConfiguration.Conventions
{
using System.ComponentModel.DataAnnotations;
using System.Data.Entity.ModelConfiguration.Configuration;
using System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive;
using System.Data.Entity.Resources;
using System.Data.Entity.Utilities;
/// <summary>
/// Convention to process instances of <see cref="MaxLengthAttribute" /> found on properties in the model.
/// </summary>
public class MaxLengthAttributeConvention
: PrimitivePropertyAttributeConfigurationConvention<MaxLengthAttribute>
{
private const int MaxLengthIndicator = -1;
/// <inheritdoc/>
public override void Apply(ConventionPrimitivePropertyConfiguration configuration, MaxLengthAttribute attribute)
{
Check.NotNull(configuration, "configuration");
Check.NotNull(attribute, "attribute");
var memberInfo = configuration.ClrPropertyInfo;
if ((attribute.Length == 0)
|| (attribute.Length < MaxLengthIndicator))
{
throw Error.MaxLengthAttributeConvention_InvalidMaxLength(
memberInfo.Name, memberInfo.ReflectedType);
}
if (attribute.Length == MaxLengthIndicator)
{
configuration.IsMaxLength();
}
else
{
configuration.HasMaxLength(attribute.Length);
}
}
}
}