<?php

/**
* Hoa
*
*
* @license
*
* New BSD License
*
* Copyright © 2007-2017, Hoa community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Hoa nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

namespace Hoa\Iterator;

/**
* Class \Hoa\Iterator\Multiple.
*
* Extending the SPL MultipleIterator class.
*
* @copyright Copyright © 2007-2017 Hoa community
* @license New BSD License
*/
class Multiple extends \MultipleIterator
{
/**
* Default value for each $infos.
*
* @var array
*/
protected $_infos = [];



/**
* Attach iterator informations.
* Add the $default argument that will be use when the iterator has reached
* its end.
*
* @param \Iterator $iterator Iterator.
* @param string $infos Informations to attach.
* @param mixed $default Default value.
* @return void
*/
public function attachIterator(
\Iterator $iterator,
$infos = null,
$default = null
) {
$out = parent::attachIterator($iterator, $infos);

if (null === $infos) {
$this->_infos[] = $default;
} else {
$this->_infos[$infos] = $default;
}

return $out;
}

/**
* Get the registered iterator instances.
*
* @return array
*/
public function current()
{
$out = parent::current();

foreach ($out as $key => &$value) {
if (null === $value) {
$value = $this->_infos[$key];
}
}

return $out;
}
}