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<?php |
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namespace FMUP\Db; |
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/** |
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* Class FetchIterator |
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* @package FMUP\Db |
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* @author [email protected] |
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* @author [email protected] |
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*/ |
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class FetchIterator implements \Iterator, \ArrayAccess |
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{ |
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/** |
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* @var mixed |
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*/ |
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private $statement; |
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/** |
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* @var DbInterface |
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*/ |
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private $dbInterface; |
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/** |
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* @var array |
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*/ |
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private $current; |
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/** |
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* @var array |
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*/ |
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private $params = array(); |
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/** |
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* @var int |
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*/ |
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private $row = 0; |
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/** |
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* @param mixed $statement |
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* @param DbInterface $dbInterface |
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* @param array $params |
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*/ |
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public function __construct($statement, DbInterface $dbInterface, array $params = array()) |
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{ |
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$this->setStatement($statement)->setDbInterface($dbInterface)->setParams($params); |
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} |
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/** |
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* Define params for the prepared statement |
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* @param array $params |
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* @return $this |
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*/ |
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public function setParams(array $params = array()) |
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{ |
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$this->params = $params; |
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return $this; |
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} |
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/** |
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* @param mixed $statement |
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* @return $this |
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*/ |
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public function setStatement($statement) |
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{ |
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$this->statement = $statement; |
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return $this; |
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} |
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/** |
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* @return mixed|\PDOStatement |
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*/ |
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public function getStatement() |
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{ |
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return $this->statement; |
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} |
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/** |
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* @return DbInterface |
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*/ |
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public function getDbInterface() |
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{ |
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return $this->dbInterface; |
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} |
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/** |
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* @param DbInterface $dbInterface |
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* @return $this |
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*/ |
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public function setDbInterface(DbInterface $dbInterface) |
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{ |
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$this->dbInterface = $dbInterface; |
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return $this; |
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} |
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/** |
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* Return format depends on Fetch Mode |
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* @return array|object |
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*/ |
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public function current() |
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{ |
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return $this->current; |
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} |
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/** |
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* @return void |
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*/ |
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public function next() |
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{ |
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$this->current = $this->getDbInterface()->fetchRow($this->getStatement()); |
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$this->row++; |
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} |
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/** |
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* @return bool |
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*/ |
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public function valid() |
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{ |
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return (bool)($this->current()); |
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} |
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public function rewind() |
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{ |
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$this->row = 0; |
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$this->getDbInterface()->execute($this->getStatement(), $this->params); |
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$this->current = $this->getDbInterface()->fetchRow($this->getStatement(), DbInterface::CURSOR_FIRST); |
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} |
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/** |
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* @return int |
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*/ |
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public function key() |
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{ |
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return (int)$this->row; |
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} |
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/** |
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* @param mixed $offset |
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* @return bool |
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*/ |
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public function offsetExists($offset) |
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{ |
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$this->seek($offset); |
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return $this->valid(); |
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} |
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/** |
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* @param mixed $offset |
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* @return array|object |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->offsetExists($offset) ? $this->current() : null; |
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} |
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/** |
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* @param mixed $offset |
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* @param mixed $value |
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* @throws Exception |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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throw new Exception("Unable to set offset $offset to value $value on iterator"); |
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} |
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/** |
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* @param mixed $offset |
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* @throws Exception |
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*/ |
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public function offsetUnset($offset) |
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{ |
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throw new Exception("Unable to unset offset $offset on iterator"); |
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} |
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/** |
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* @param int $offset |
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*/ |
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protected function seek($offset) |
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{ |
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$this->row = (int)$offset; |
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$this->current = $this->getDbInterface()->fetchRow( |
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$this->getStatement(), |
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DbInterface::CURSOR_FIRST, |
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$this->row |
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); |
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if ($this->current === false) { |
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$this->getStatement()->execute(); |
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$this->current = $this->getDbInterface()->fetchRow( |
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$this->getStatement(), |
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DbInterface::CURSOR_FIRST, |
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$this->row |
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); |
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} |
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} |
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} |
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Logi-CE /
fmup
