static void CanWriteCheck(Object obj)
{
Attribute checking = new AccountsAttribute(Accounts.Checking);
Attribute validAccounts = Attribute.GetCustomAttribute(obj.GetType(), typeof(AccountsAttribute), false);
if (validAccounts != null && checking.Match(validAccounts))
{
Console.WriteLine($"{obj.GetType()} types can write checks.");
}
else
{
Console.WriteLine($"{obj.GetType()} types can NOT write checks.");
}
}
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (this.GetType() != obj.GetType())
{
return(false);
}
AccountsAttribute other = (AccountsAttribute)obj;
if ((other.m_accounts & m_accounts) != m_accounts)
{
return(false);
}
return(true);
}
public override bool Match(object obj)
{
//由于this 不为null， 如果obj=null，那么对象肯定不相等
if (obj == null)
{
return(false);
}
//如果对象的类型不一样，则肯定不相等
if (this.GetType() != obj.GetType())
{
return(false);
}
AccountsAttribute other = (AccountsAttribute)obj;
if ((other.m_accounts & m_accounts) != m_accounts)
{
return(false);
}
return(true);
}
