[Sommaire] [Imprimer]

   1  <?php
   2  /*
   3   *  $Id: PgSQLIdGenerator.php,v 1.5 2004/03/19 14:19:50 hlellelid Exp $
   4   *
   5   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   6   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   7   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   8   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   9   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  10   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  11   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  12   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  13   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  14   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  15   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  16   *
  17   * This software consists of voluntary contributions made by many individuals
  18   * and is licensed under the LGPL. For more information please see
  19   * <http://creole.phpdb.org>.
  20   */
  21   
  22  require_once 'creole/IdGenerator.php';
  23  
  24  /**
  25   * PostgreSQL IdGenerator implemenation.
  26   *
  27   * @author    Hans Lellelid <hans@xmpl.org>
  28   * @version   $Revision: 1.5 $
  29   * @package   creole.drivers.pgsql
  30   */
  31  class PgSQLIdGenerator implements IdGenerator {
  32      
  33      /** Connection object that instantiated this class */
  34      private $conn;
  35  
  36      /**
  37       * Creates a new IdGenerator class, saves passed connection for use
  38       * later by getId() method.
  39       * @param Connection $conn
  40       */
  41      public function __construct(Connection $conn)
  42      {
  43          $this->conn = $conn;
  44      }
  45      
  46      /**
  47       * @see IdGenerator::isBeforeInsert()
  48       */
  49      public function isBeforeInsert()
  50      {
  51          return true;
  52      }    
  53      
  54      /**
  55       * @see IdGenerator::isAfterInsert()
  56       */
  57      public function isAfterInsert()
  58      {
  59          return false;
  60      }
  61          
  62      /**
  63       * @see IdGenerator::getIdMethod()
  64       */
  65      public function getIdMethod()
  66      {
  67          return self::SEQUENCE;
  68      }
  69      
  70      /**
  71       * @see IdGenerator::getId()
  72       */
  73      public function getId($name = null)
  74      {
  75          if ($name === null) {
  76              throw new SQLException("You must specify the sequence name when calling getId() method.");
  77          }
  78          $rs = $this->conn->executeQuery("SELECT nextval('" . pg_escape_string ( $name ) . "')", ResultSet::FETCHMODE_NUM);
  79          $rs->next();
  80          return $rs->getInt(1);
  81      }
  82      
  83  }
  84