Subversion-Projekte lars-tiefland.php_share

<?php
/**
 * This file contains the class XML_Query2XML_Data_Processor_Unserialize.
 *
 * PHP version 5
 *
 * @category  XML
 * @package   XML_Query2XML
 * @author    Lukas Feiler <lukas.feiler@lukasfeiler.com>
 * @copyright 2009 Lukas Feiler
 * @license   http://www.gnu.org/copyleft/lesser.html  LGPL Version 2.1
 * @version   CVS: $Id: Unserialize.php 276639 2009-03-01 13:17:08Z lukasfeiler $
 * @link      http://pear.php.net/package/XML_Query2XML
 * @access    private
 */

/**
 * XML_Query2XML_Data_Processor_Unserialize extends the class
 * XML_Query2XML_Data_Processor.
 */
require_once 'XML/Query2XML/Data/Processor.php';

/**
 * Data Processor Class that allows unserialization of XML data returned by
 * a pre-processor as a string.
 *
 * XML_Query2XML_Data_Processor_Unserialize only works with a pre-processor
 * that returns a string.
 *
 * usage:
 * <code>
 * $commandObject = new XML_Query2XML_Data_Processor_Unserialize(
 *   new XML_Query2XML_Data_Source_ColumnValue('xml_data')  //pre-processor
 * );
 * </code>
 *
 * @category  XML
 * @package   XML_Query2XML
 * @author    Lukas Feiler <lukas.feiler@lukasfeiler.com>
 * @copyright 2009 Lukas Feiler
 * @license   http://www.gnu.org/copyleft/lesser.html  LGPL Version 2.1
 * @version   Release: 1.7.2
 * @link      http://pear.php.net/package/XML_Query2XML
 * @access    private
 * @since     Release 1.7.1RC1
 */
class XML_Query2XML_Data_Processor_Unserialize extends XML_Query2XML_Data_Processor
{
    /**
     * Create a new instance of this class.
     *
     * @param mixed  $preProcessor The pre-processor to be used. An instance of
     *                             XML_Query2XML_Data or null.
     * @param string $configPath   The configuration path within the $options
     *                             array.
     *
     * @return XML_Query2XML_Data_Processor_Unserialize
     */
    public function create($preProcessor, $configPath)
    {
        $processor = new XML_Query2XML_Data_Processor_Unserialize($preProcessor);
        $processor->setConfigPath($configPath);
        return $processor;
    }
    
    /**
     * Called by XML_Query2XML for every record in the result set.
     * This method will return an instance of DOMElement or null
     * if an empty string was returned by the pre-processor.
     *
     * @param array $record An associative array.
     *
     * @return DOMElement
     * @throws XML_Query2XML_ConfigException If the pre-processor returned
     *                      something that cannot be converted to a string (i.e. an
     *                      array or an object) or if that string could not be
     *                      unserialized, i.e. was not corretly formatted XML.
     */
    public function execute(array $record)
    {
        $doc = new DOMDocument();
        $xml = $this->runPreProcessor($record);
        if (is_array($xml) || is_object($xml)) {
            throw new XML_Query2XML_XMLException(
                $this->getConfigPath()
                . 'XML_Query2XML_Data_Processor_Unserialize: string '
                . 'expected from pre-processor, but ' . gettype($xml) . ' returned.'
            );
        } else {
            if (strlen($xml)) {
                if (!@$doc->loadXML($xml)) {
                    throw new XML_Query2XML_XMLException(
                        $this->getConfigPath()
                        . 'XML_Query2XML_Data_Processor_Unserialize: '
                        . 'Could not unserialize the following XML data: "'
                        . $xml . '"'
                    );
                }
                return $doc->documentElement;
            } else {
                return null;
            }    
        }
    }
}
?>