interface/modules/zend_modules/library/Zend/Db/Sql/Ddl/Constraint/UniqueKey.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Db\Sql\Ddl\Constraint;
  11
  12 class UniqueKey extends AbstractConstraint
  13 {
  14     /**
  15      * @var string
  16      */
  17     protected $specification = 'CONSTRAINT UNIQUE KEY %s(...)';
  18
  19     /**
  20      * @param  string $column
  21      * @param  null|string $name
  22      */
  23     public function __construct($column, $name = null)
  24     {
  25         $this->setColumns($column);
  26         $this->name = $name;
  27     }
  28
  29     /**
  30      * @return array
  31      */
  32     public function getExpressionData()
  33     {
  34         $colCount = count($this->columns);
  35
  36         $values   = array();
  37         $values[] = ($this->name) ? $this->name : '';
  38
  39         $newSpecTypes = array(self::TYPE_IDENTIFIER);
  40         $newSpecParts = array();
  41
  42         for ($i = 0; $i < $colCount; $i++) {
  43             $newSpecParts[] = '%s';
  44             $newSpecTypes[] = self::TYPE_IDENTIFIER;
  45         }
  46
  47         $newSpec = str_replace('...', implode(', ', $newSpecParts), $this->specification);
  48
  49         return array(array(
  50             $newSpec,
  51             array_merge($values, $this->columns),
  52             $newSpecTypes,
  53         ));
  54     }
  55 }