142 Zeilen
3,8 KiB
PHP
142 Zeilen
3,8 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Paginator
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* @category Zend
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* @package Zend_Paginator
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Paginator_SerializableLimitIterator extends LimitIterator implements Serializable, ArrayAccess
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{
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/**
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* Offset to first element
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*
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* @var int
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*/
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private $_offset;
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/**
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* Maximum number of elements to show or -1 for all
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*
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* @var int
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*/
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private $_count;
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/**
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* Construct a Zend_Paginator_SerializableLimitIterator
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*
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* @param Iterator $it Iterator to limit (must be serializable by un-/serialize)
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* @param int $offset Offset to first element
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* @param int $count Maximum number of elements to show or -1 for all
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* @see LimitIterator::__construct
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*/
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public function __construct (Iterator $it, $offset=0, $count=-1)
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{
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parent::__construct($it, $offset, $count);
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$this->_offset = $offset;
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$this->_count = $count;
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}
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/**
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* @return string representation of the instance
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*/
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public function serialize()
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{
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return serialize(array(
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'it' => $this->getInnerIterator(),
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'offset' => $this->_offset,
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'count' => $this->_count,
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'pos' => $this->getPosition(),
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));
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}
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/**
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* @param string $data representation of the instance
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*/
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public function unserialize($data)
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{
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$dataArr = unserialize($data);
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$this->__construct($dataArr['it'], $dataArr['offset'], $dataArr['count']);
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$this->seek($dataArr['pos']+$dataArr['offset']);
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}
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/**
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* Returns value of the Iterator
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*
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* @param int $offset
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* @return mixed
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*/
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public function offsetGet($offset)
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{
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$currentOffset = $this->key();
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$this->seek($offset);
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$current = $this->current();
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$this->seek($currentOffset);
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return $current;
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}
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/**
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* Does nothing
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* Required by the ArrayAccess implementation
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*
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* @param int $offset
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* @param mixed $value
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*/
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public function offsetSet($offset, $value)
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{
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}
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/**
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* Determine if a value of Iterator is set and is not NULL
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*
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* @param int $offset
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*/
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public function offsetExists($offset)
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{
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if ($offset > 0 && $offset < $this->_count) {
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try {
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$currentOffset = $this->key();
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$this->seek($offset);
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$current = $this->current();
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$this->seek($currentOffset);
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return null !== $current;
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} catch (OutOfBoundsException $e) {
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// reset position in case of exception is assigned null
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$this->rewind();
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$this->seek($currentOffset);
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return false;
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}
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}
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return false;
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}
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/**
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* Does nothing
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* Required by the ArrayAccess implementation
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*
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* @param int $offset
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*/
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public function offsetUnset($offset)
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{
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}
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}
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