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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2016 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Db\Sql;
use Zend\Db\Adapter\ParameterContainer;
use Zend\Db\Adapter\Platform\PlatformInterface;
use Zend\Db\Adapter\Driver\DriverInterface;
/**
*
* @property Where $where
*/
class Delete extends AbstractPreparableSql
{
/**@#+
* @const
*/
const SPECIFICATION_DELETE = 'delete';
const SPECIFICATION_WHERE = 'where';
/**@#-*/
/**
* {@inheritDoc}
*/
protected $specifications = [
self::SPECIFICATION_DELETE => 'DELETE FROM %1$s',
self::SPECIFICATION_WHERE => 'WHERE %1$s'
];
/**
* @var string|TableIdentifier
*/
protected $table = '';
/**
* @var bool
*/
protected $emptyWhereProtection = true;
/**
* @var array
*/
protected $set = [];
/**
* @var null|string|Where
*/
protected $where = null;
/**
* Constructor
*
* @param null|string|TableIdentifier $table
*/
public function __construct($table = null)
{
if ($table) {
$this->from($table);
}
$this->where = new Where();
}
/**
* Create from statement
*
* @param string|TableIdentifier $table
* @return self Provides a fluent interface
*/
public function from($table)
{
$this->table = $table;
return $this;
}
/**
* @param null $key
*
* @return mixed
*/
public function getRawState($key = null)
{
$rawState = [
'emptyWhereProtection' => $this->emptyWhereProtection,
'table' => $this->table,
'set' => $this->set,
'where' => $this->where
];
return (isset($key) && array_key_exists($key, $rawState)) ? $rawState[$key] : $rawState;
}
/**
* Create where clause
*
* @param Where|\Closure|string|array $predicate
* @param string $combination One of the OP_* constants from Predicate\PredicateSet
*
* @return self Provides a fluent interface
*/
public function where($predicate, $combination = Predicate\PredicateSet::OP_AND)
{
if ($predicate instanceof Where) {
$this->where = $predicate;
} else {
$this->where->addPredicates($predicate, $combination);
}
return $this;
}
/**
* @param PlatformInterface $platform
* @param DriverInterface|null $driver
* @param ParameterContainer|null $parameterContainer
*
* @return string
*/
protected function processDelete(
PlatformInterface $platform,
DriverInterface $driver = null,
ParameterContainer $parameterContainer = null
) {
return sprintf(
$this->specifications[static::SPECIFICATION_DELETE],
$this->resolveTable($this->table, $platform, $driver, $parameterContainer)
);
}
/**
* @param PlatformInterface $platform
* @param DriverInterface|null $driver
* @param ParameterContainer|null $parameterContainer
*
* @return null|string
*/
protected function processWhere(
PlatformInterface $platform,
DriverInterface $driver = null,
ParameterContainer $parameterContainer = null
) {
if ($this->where->count() == 0) {
return;
}
return sprintf(
$this->specifications[static::SPECIFICATION_WHERE],
$this->processExpression($this->where, $platform, $driver, $parameterContainer, 'where')
);
}
/**
* Property overloading
*
* Overloads "where" only.
*
* @param string $name
*
* @return Where|null
*/
public function __get($name)
{
switch (strtolower($name)) {
case 'where':
return $this->where;
}
}
}