using System;
using System.Diagnostics.CodeAnalysis;
using BLToolkit.Common;

namespace BLToolkit.Mapping
{
    [AttributeUsage(
        AttributeTargets.Property | AttributeTargets.Field |
        AttributeTargets.Class | AttributeTargets.Interface)]
    public sealed class TrimmableAttribute : Attribute
    {
        public TrimmableAttribute()
        {
            _isTrimmable = true;
        }

        public TrimmableAttribute(bool isTrimmable)
        {
            _isTrimmable = isTrimmable;
        }

        private readonly bool _isTrimmable;
        public           bool  IsTrimmable
        {
            get { return _isTrimmable;  }
        }

        private static TrimmableAttribute GetDefaultTrimmableAttribute()
        {
            return Common.Configuration.TrimOnMapping ? Yes : No;
        }

        [SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
        public static readonly TrimmableAttribute Yes     = new TrimmableAttribute(true);
        [SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
        public static readonly TrimmableAttribute No      = new TrimmableAttribute(false);
        [SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
        public static readonly TrimmableAttribute Default = GetDefaultTrimmableAttribute();
    }
}