76 lines
1.7 KiB
PHP
76 lines
1.7 KiB
PHP
<?php
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require_once 'creole/IdGenerator.php';
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/**
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* MySQL IdGenerator implimenation.
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*
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* @author Hans Lellelid <hans@xmpl.org>
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* @version $Revision: 1.6 $
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* @package creole.drivers.mysql
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*/
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class MySQLIdGenerator implements IdGenerator {
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/** Connection object that instantiated this class */
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private $conn;
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/**
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* Creates a new IdGenerator class, saves passed connection for use
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* later by getId() method.
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* @param Connection $conn
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*/
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public function __construct(Connection $conn)
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{
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$this->conn = $conn;
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}
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/**
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* @see IdGenerator::isBeforeInsert()
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*/
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public function isBeforeInsert()
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{
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return false;
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}
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/**
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* @see IdGenerator::isAfterInsert()
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*/
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public function isAfterInsert()
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{
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return true;
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}
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/**
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* @see IdGenerator::getIdMethod()
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*/
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public function getIdMethod()
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{
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return self::AUTOINCREMENT;
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}
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/**
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* Returns last-generated auto-increment ID.
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*
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* Note that for very large values (2,147,483,648 to 9,223,372,036,854,775,807) a string
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* will be returned, because these numbers are larger than supported by PHP's native
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* numeric datatypes.
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*
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* @see IdGenerator::getId()
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*/
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public function getId($unused = null)
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{
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$insert_id = mysql_insert_id($this->conn->getResource());
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if ( $insert_id < 0 ) {
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$insert_id = null;
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$result = mysql_query('SELECT LAST_INSERT_ID()', $this->conn->getResource());
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if ( $result ) {
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$row = mysql_fetch_row($result);
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$insert_id = $row ? $row[0] : null;
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}
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}
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return $insert_id;
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}
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}
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