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using System.ComponentModel.DataAnnotations.Resources;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
namespace System.ComponentModel.DataAnnotations.Schema {
/// <summary>
/// Specifies the database column that a property is mapped to.
/// </summary>
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
[SuppressMessage("Microsoft.Performance", "CA1813:AvoidUnsealedAttributes", Justification = "We want users to be able to extend this class")]
public class ColumnAttribute : Attribute {
private readonly string _name;
private string _typeName;
private int _order = -1;
/// <summary>
/// Initializes a new instance of the <see cref="ColumnAttribute"/> class.
/// </summary>
public ColumnAttribute() {
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnAttribute"/> class.
/// </summary>
/// <param name="name">The name of the column the property is mapped to.</param>
public ColumnAttribute(string name) {
if (string.IsNullOrWhiteSpace(name)) {
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, DataAnnotationsResources.ArgumentIsNullOrWhitespace, "name"));
}
_name = name;
}
/// <summary>
/// The name of the column the property is mapped to.
/// </summary>
public string Name {
get { return _name; }
}
/// <summary>
/// The zero-based order of the column the property is mapped to.
/// </summary>
public int Order {
get { return _order; }
set {
if (value < 0) {
throw new ArgumentOutOfRangeException("value");
}
_order = value;
}
}
/// <summary>
/// The database provider specific data type of the column the property is mapped to.
/// </summary>
public string TypeName {
get { return _typeName; }
set {
if (string.IsNullOrWhiteSpace(value)) {
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, DataAnnotationsResources.ArgumentIsNullOrWhitespace, "value"));
}
_typeName = value;
}
}
}
}
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