lib/dml/oci_native_moodle_recordset.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Oracle specific recordset.
  19  *
  20  * @package    core_dml
  21  * @copyright  2008 Petr Skoda (http://skodak.org)
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 defined('MOODLE_INTERNAL') || die();
  26
  27 require_once(__DIR__.'/moodle_recordset.php');
  28
  29 class oci_native_moodle_recordset extends moodle_recordset {
  30
  31     protected $stmt;
  32     protected $current;
  33
  34     public function __construct($stmt) {
  35         $this->stmt  = $stmt;
  36         $this->current = $this->fetch_next();
  37     }
  38
  39     public function __destruct() {
  40         $this->close();
  41     }
  42
  43     private function fetch_next() {
  44         if (!$this->stmt) {
  45             return false;
  46         }
  47         if (!$row = oci_fetch_array($this->stmt, OCI_ASSOC + OCI_RETURN_NULLS + OCI_RETURN_LOBS)) {
  48             oci_free_statement($this->stmt);
  49             $this->stmt = null;
  50             return false;
  51         }
  52
  53         $row = array_change_key_case($row, CASE_LOWER);
  54         unset($row['oracle_rownum']);
  55         array_walk($row, array('oci_native_moodle_database', 'onespace2empty'));
  56         return $row;
  57     }
  58
  59     public function current() {
  60         return (object)$this->current;
  61     }
  62
  63     public function key() {
  64         // return first column value as key
  65         if (!$this->current) {
  66             return false;
  67         }
  68         $key = reset($this->current);
  69         return $key;
  70     }
  71
  72     public function next() {
  73         $this->current = $this->fetch_next();
  74     }
  75
  76     public function valid() {
  77         return !empty($this->current);
  78     }
  79
  80     public function close() {
  81         if ($this->stmt) {
  82             oci_free_statement($this->stmt);
  83             $this->stmt  = null;
  84         }
  85         $this->current = null;
  86     }
  87 }