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2388 jpm 1 
<?php
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/**
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 * PHPExcel
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 *
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 * Copyright (c) 2006 - 2013 PHPExcel
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 * @category   PHPExcel
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 * @package    PHPExcel
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 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
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 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
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 * @version    ##VERSION##, ##DATE##
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 */
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/**
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 * PHPExcel_WorksheetIterator
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 *
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 * Used to iterate worksheets in PHPExcel
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 *
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 * @category   PHPExcel
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 * @package    PHPExcel
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 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
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 */
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class PHPExcel_WorksheetIterator implements Iterator
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{
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    /**
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     * Spreadsheet to iterate
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     *
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     * @var PHPExcel
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     */
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    private $_subject;
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    /**
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     * Current iterator position
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     *
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     * @var int
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     */
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    private $_position = 0;
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    /**
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     * Create a new worksheet iterator
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     *
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     * @param PHPExcel         $subject
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     */
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    public function __construct(PHPExcel $subject = null)
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    {
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        // Set subject
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        $this->_subject = $subject;
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    }
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    /**
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     * Destructor
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     */
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    public function __destruct()
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    {
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        unset($this->_subject);
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    }
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    /**
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     * Rewind iterator
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     */
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    public function rewind()
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    {
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        $this->_position = 0;
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    }
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    /**
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     * Current PHPExcel_Worksheet
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     *
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     * @return PHPExcel_Worksheet
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     */
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    public function current()
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    {
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        return $this->_subject->getSheet($this->_position);
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    }
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    /**
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     * Current key
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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 $this->_position;
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    }
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    /**
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     * Next value
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     */
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    public function next()
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    {
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        ++$this->_position;
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    }
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    /**
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     * More PHPExcel_Worksheet instances available?
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     *
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     * @return boolean
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     */
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    public function valid()
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    {
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        return $this->_position < $this->_subject->getSheetCount();
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    }
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}