Current File : //opt/alt/php55/usr/share/pear/Object/Freezer/HashGenerator/NonRecursiveSHA1.php
<?php
/**
* Object_Freezer
*
* Copyright (c) 2008-2011, Sebastian Bergmann <sb@sebastian-bergmann.de>.
* 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 Sebastian Bergmann nor the names of his
* 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 OWNER OR 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.
*
* @package Object_Freezer
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @copyright 2008-2011 Sebastian Bergmann <sb@sebastian-bergmann.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @since File available since Release 1.0.0
*/
require_once 'Object/Freezer/HashGenerator.php';
require_once 'Object/Freezer/Util.php';
/**
* Interface for generators of object hashes.
*
* @package Object_Freezer
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @copyright 2008-2011 Sebastian Bergmann <sb@sebastian-bergmann.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version Release: 1.0.0
* @link http://github.com/sebastianbergmann/php-object-freezer/
* @since Interface available since Release 1.0.0
*/
class Object_Freezer_HashGenerator_NonRecursiveSHA1 implements Object_Freezer_HashGenerator
{
/**
* @var Object_Freezer_IdGenerator
*/
protected $idGenerator;
/**
* Constructor.
*
* @param Object_Freezer_IdGenerator $idGenerator
*/
public function __construct(Object_Freezer_IdGenerator $idGenerator)
{
$this->idGenerator = $idGenerator;
}
/**
* Implementation of Object_Freezer_HashGenerator that uses the SHA1
* hashing function on the attribute values of an object without recursing
* into aggregated arrays or objects.
*
* @param object $object The object that is to be hashed.
* @return string
* @throws InvalidArgumentException
*/
public function getHash($object)
{
// Bail out if a non-object was passed.
if (!is_object($object)) {
throw Object_Freezer_Util::getInvalidArgumentException(1, 'object');
}
$attributes = Object_Freezer_Util::readAttributes($object);
ksort($attributes);
if (isset($attributes['__php_object_freezer_hash'])) {
unset($attributes['__php_object_freezer_hash']);
}
foreach ($attributes as $key => $value) {
if (is_array($value)) {
$attributes[$key] = '<array>';
}
else if (is_object($value)) {
if (!isset($value->__php_object_freezer_uuid)) {
$value->__php_object_freezer_uuid =
$this->idGenerator->getId();
}
$attributes[$key] = $value->__php_object_freezer_uuid;
}
else if (is_resource($value)) {
$attributes[$key] = NULL;
}
}
return sha1(get_class($object) . join(':', $attributes));
}
}
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