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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_HashTable
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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_HashTable
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{
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	/**
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	 * HashTable elements
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	 *
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	 * @var array
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	 */
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	public $_items = array();
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	/**
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	 * HashTable key map
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	 *
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	 * @var array
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	 */
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	public $_keyMap = array();
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	/**
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	 * Create a new PHPExcel_HashTable
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	 *
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	 * @param	PHPExcel_IComparable[] $pSource	Optional source array to create HashTable from
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	 * @throws	PHPExcel_Exception
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	 */
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	public function __construct($pSource = null)
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	{
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		if ($pSource !== NULL) {
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			// Create HashTable
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			$this->addFromSource($pSource);
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		}
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	}
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	/**
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	 * Add HashTable items from source
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	 *
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	 * @param	PHPExcel_IComparable[] $pSource	Source array to create HashTable from
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	 * @throws	PHPExcel_Exception
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	 */
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	public function addFromSource($pSource = null) {
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		// Check if an array was passed
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		if ($pSource == null) {
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			return;
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		} else if (!is_array($pSource)) {
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			throw new PHPExcel_Exception('Invalid array parameter passed.');
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		}
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		foreach ($pSource as $item) {
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			$this->add($item);
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		}
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	}
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	/**
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	 * Add HashTable item
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	 *
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	 * @param	PHPExcel_IComparable $pSource	Item to add
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	 * @throws	PHPExcel_Exception
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	 */
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	public function add(PHPExcel_IComparable $pSource = null) {
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		$hash = $pSource->getHashCode();
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		if (!isset($this->_items[$hash])) {
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			$this->_items[$hash] = $pSource;
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			$this->_keyMap[count($this->_items) - 1] = $hash;
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		}
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	}
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	/**
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	 * Remove HashTable item
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	 *
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	 * @param	PHPExcel_IComparable $pSource	Item to remove
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	 * @throws	PHPExcel_Exception
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	 */
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	public function remove(PHPExcel_IComparable $pSource = null) {
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		$hash = $pSource->getHashCode();
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		if (isset($this->_items[$hash])) {
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			unset($this->_items[$hash]);
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			$deleteKey = -1;
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			foreach ($this->_keyMap as $key => $value) {
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				if ($deleteKey >= 0) {
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					$this->_keyMap[$key - 1] = $value;
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				}
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				if ($value == $hash) {
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					$deleteKey = $key;
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				}
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			}
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			unset($this->_keyMap[count($this->_keyMap) - 1]);
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		}
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	}
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	/**
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	 * Clear HashTable
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	 *
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	 */
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	public function clear() {
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		$this->_items = array();
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		$this->_keyMap = array();
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	}
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	/**
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	 * Count
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	 *
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	 * @return int
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	 */
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	public function count() {
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		return count($this->_items);
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	}
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	/**
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	 * Get index for hash code
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	 *
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	 * @param	string	$pHashCode
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	 * @return	int	Index
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	 */
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	public function getIndexForHashCode($pHashCode = '') {
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		return array_search($pHashCode, $this->_keyMap);
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	}
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	/**
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	 * Get by index
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	 *
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	 * @param	int	$pIndex
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	 * @return	PHPExcel_IComparable
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	 *
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	 */
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	public function getByIndex($pIndex = 0) {
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		if (isset($this->_keyMap[$pIndex])) {
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			return $this->getByHashCode( $this->_keyMap[$pIndex] );
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		}
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		return null;
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	}
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	/**
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	 * Get by hashcode
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	 *
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	 * @param	string	$pHashCode
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	 * @return	PHPExcel_IComparable
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	 *
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	 */
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	public function getByHashCode($pHashCode = '') {
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		if (isset($this->_items[$pHashCode])) {
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			return $this->_items[$pHashCode];
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		}
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		return null;
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	}
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	/**
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	 * HashTable to array
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	 *
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	 * @return PHPExcel_IComparable[]
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	 */
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	public function toArray() {
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		return $this->_items;
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	}
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	/**
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	 * Implement PHP __clone to create a deep clone, not just a shallow copy.
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	 */
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	public function __clone() {
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		$vars = get_object_vars($this);
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		foreach ($vars as $key => $value) {
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			if (is_object($value)) {
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				$this->$key = clone $value;
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			}
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		}
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	}
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}