So, in a nutshell, your objects of class "Thing" contain the class name of the back end class, in the hash member $x->{backend}. As far as I am concerned, this is perfectly acceptable.

There may be alternatives, if for instance you actually need to have (and keep track of) an object blessed into the back end class, associated with the "Thing" object. In this case, you would just store a reference to this object (you can then get its class name using ref if you really want it).

Another alternative is the factory pattern, where method calls in your "Thing" class spit out backend objects given parameters, etc.

It's a case of TIMTOWDI.

--
I'm Not Just Another Perl Hacker

In reply to Re: how do you call this? $x->bar(); by rinceWind
in thread how do you call this? $x->bar(); by dada

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.