using System.Reflection;
using Tanshu.Accounts.Contracts;

namespace Tanshu.Accounts.SqlDAO
{
    public static class AttributeChecker
    {
        public static bool Cascade(ICustomAttributeProvider provider)
        {
            return provider.GetCustomAttributes(typeof(CascadeAttribute), false).Length == 1;
        }
        public static bool Inverse(ICustomAttributeProvider provider)
        {
            return provider.GetCustomAttributes(typeof(InverseAttribute), false).Length == 1;
        }
        public static bool Unique(ICustomAttributeProvider provider)
        {
            return provider.GetCustomAttributes(typeof(UniqueAttribute), false).Length == 1;
        }
        public static bool NotNull(ICustomAttributeProvider provider)
        {
            return provider.GetCustomAttributes(typeof(NotNullAttribute), false).Length == 1;
        }
        public static bool Formula(ICustomAttributeProvider provider)
        {
            return provider.GetCustomAttributes(typeof(FormulaAttribute), false).Length == 1;
        }
        public static string GetFormula(ICustomAttributeProvider provider)
        {
            var vv = (FormulaAttribute)provider.GetCustomAttributes(typeof(FormulaAttribute), false)[0];
            return vv.Formula;
        }
    }
}