using System;

namespace JD.Reflection.Attributes
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
    public class ImportAttribute : Attribute, IImportAttribute
    {
        #region Constructor

        public ImportAttribute()
            : this(null)
        {
        }

        public ImportAttribute(string contractName)
        {
            ContractName = contractName;
        }

        #endregion

        #region Properties

        public string ContractName { get; private set; }

        public bool AllowDefault { get; set; }

        ImportCardinality IImportAttribute.Cardinality
        {
            get
            {
                return AllowDefault ? ImportCardinality.ZeroOrOne : ImportCardinality.ExactlyOne;
            }
        }

        #endregion
    }
}