<?php /** * Zend Framework (http://framework.zend.com/) * * @link http://github.com/zendframework/zf2 for the canonical source repository * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ namespace Zend\Db\Sql\Ddl\Constraint; abstract class AbstractConstraint implements ConstraintInterface { /** * @var array */ protected $columns = array(); /** * @param null|string|array $columns */ public function __construct($columns = null) { (!$columns) ?: $this->setColumns($columns); } /** * @param null|string|array $columns * @return self */ public function setColumns($columns) { if (!is_array($columns)) { $columns = array($columns); } $this->columns = $columns; return $this; } /** * @param string $column * @return self */ public function addColumn($column) { $this->columns[] = $column; return $this; } /** * @return array */ public function getColumns() { return $this->columns; } }