<?php

  class mw_data_sgbds extends mw_data{

    public function sgbds(){
      $env = $this->env();
      $sgbds = array();
      $impls_dir = $env->app_file("data/impl");
      if(!file_exists($impls_dir) || !is_dir($impls_dir)){
        return false;
      }
      if($dh = opendir($impls_dir)){
        $OK = true;
        while($OK && ($impl_file = readdir($dh)) !== false){
          if(substr($impl_file, 0 ,1) !== "." && substr($impl_file, -4) == ".php"){
            require_once $impls_dir."/".$impl_file;
            if(class_exists($class_name = substr($impl_file, 0, -4))){
              if(
                    method_exists($class_name, "name")
                &&  method_exists($class_name, "extention_ok")
              ){
                $impl = new $class_name($env);
                if($impl->extention_ok($env)) $sgbds[$class_name] = $impl;
              }
            }
          }
        }
      }
      else{
        return false;
      }
      return $sgbds;
    }

  }