includes/db/ORMResult.php

   1 <?php
   2 /**
   3  * ORMIterator that takes a ResultWrapper object returned from
   4  * a select operation returning IORMRow objects (ie IORMTable::select).
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @since 1.20
  22  *
  23  * @file ORMResult.php
  24  * @ingroup ORM
  25  *
  26  * @licence GNU GPL v2 or later
  27  * @author Jeroen De Dauw < jeroendedauw@gmail.com >
  28  */
  29
  30 class ORMResult implements ORMIterator {
  31
  32         /**
  33          * @var ResultWrapper
  34          */
  35         protected $res;
  36
  37         /**
  38          * @var integer
  39          */
  40         protected $key;
  41
  42         /**
  43          * @var IORMRow
  44          */
  45         protected $current;
  46
  47         /**
  48          * @var IORMTable
  49          */
  50         protected $table;
  51
  52         /**
  53          * @param IORMTable $table
  54          * @param ResultWrapper $res
  55          */
  56         public function __construct( IORMTable $table, ResultWrapper $res ) {
  57                 $this->table = $table;
  58                 $this->res = $res;
  59                 $this->key = 0;
  60                 $this->setCurrent( $this->res->current() );
  61         }
  62
  63         /**
  64          * @param $row
  65          */
  66         protected function setCurrent( $row ) {
  67                 if ( $row === false ) {
  68                         $this->current = false;
  69                 } else {
  70                         $this->current = $this->table->newRowFromDBResult( $row );
  71                 }
  72         }
  73
  74         /**
  75          * @return integer
  76          */
  77         public function count() {
  78                 return $this->res->numRows();
  79         }
  80
  81         /**
  82          * @return boolean
  83          */
  84         public function isEmpty() {
  85                 return $this->res->numRows() === 0;
  86         }
  87
  88         /**
  89          * @return IORMRow
  90          */
  91         public function current() {
  92                 return $this->current;
  93         }
  94
  95         /**
  96          * @return integer
  97          */
  98         public function key() {
  99                 return $this->key;
 100         }
 101
 102         public function next() {
 103                 $row = $this->res->next();
 104                 $this->setCurrent( $row );
 105                 $this->key++;
 106         }
 107
 108         public function rewind() {
 109                 $this->res->rewind();
 110                 $this->key = 0;
 111                 $this->setCurrent( $this->res->current() );
 112         }
 113
 114         /**
 115          * @return boolean
 116          */
 117         public function valid() {
 118                 return $this->current !== false;
 119         }
 120
 121 }