src/Rows/PageIterator.php
<?php
namespace Yaoi\Rows;
use ArrayIterator;
use Iterator;
class PageIterator implements Iterator
{
private $iterators;
/**
* @var Iterator
*/
private $currentIterator;
function __construct(Iterator $iterators)
{
//echo '_';
$this->iterators = $iterators;
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Return the current element
* @link http://php.net/manual/en/iterator.current.php
* @return mixed Can return any type.
*/
public function current()
{
//echo 'c';
return $this->currentIterator->current();
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Move forward to next element
* @link http://php.net/manual/en/iterator.next.php
* @return void Any returned value is ignored.
*/
public function next()
{
//echo 'n';
$this->currentIterator->next();
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Return the key of the current element
* @link http://php.net/manual/en/iterator.key.php
* @return mixed scalar on success, or null on failure.
*/
public function key()
{
//echo 'k';
return $this->currentIterator->key();
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Checks if current position is valid
* @link http://php.net/manual/en/iterator.valid.php
* @return boolean The return value will be casted to boolean and then evaluated.
* Returns true on success or false on failure.
*/
public function valid()
{
//echo 'v';
$v = $this->currentIterator->valid();
if (!$v) {
do {
$this->iterators->next();
if ($this->iterators->valid()) {
$this->currentIterator = $this->iterators->current();
$this->currentIterator->rewind();
}
} while ($this->iterators->valid() && !$this->currentIterator->valid());
if (!$this->currentIterator->valid()) {
return false;
} else {
return true;
}
}
return $v;
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Rewind the Iterator to the first element
* @link http://php.net/manual/en/iterator.rewind.php
* @return void Any returned value is ignored.
*/
public function rewind()
{
//echo 'r';
$this->iterators->rewind();
if (!$this->iterators->valid()) {
$this->currentIterator = new ArrayIterator(array());
} else {
$this->currentIterator = $this->iterators->current();
}
$this->currentIterator->rewind();
}
}