using System;
using System.Reflection;

namespace JD.Reflection.MefImplementations.Model.Internal
{
    internal struct LazyMemberInfo
    {
        #region Variables

        private readonly Func<MemberInfo> m_memberProvider;
        private MemberInfo m_resolvedMember;

        #endregion

        #region Constructor

        public LazyMemberInfo(MemberInfo member)
        {
            m_memberProvider = null;
            m_resolvedMember = member;
        }

        public LazyMemberInfo(Func<MemberInfo> memberProvider)
        {
            m_memberProvider = memberProvider;
            m_resolvedMember = null;
        }

        #endregion

        #region Properties

        public MemberInfo Member
        {
            get
            {
                if (m_resolvedMember == null && m_memberProvider != null)
                {
                    m_resolvedMember = m_memberProvider();
                }

                return m_resolvedMember;
            }
        }

        #endregion
    }
}