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Filename : IssueXml.php
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<?php
/**
 * Issue XML Document
 *
 * PHP Version 5.3.2
 *
 * Copyright (c) 2007-2009, Mayflower GmbH
 * 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 Mayflower GmbH 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.
 *
 * @category  PHP_CodeBrowser
 * @package   PHP_CodeBrowser
 * @author    Elger Thiele <elger.thiele@mayflower.de>
 * @author    Michel Hartmann <michel.hartmann@mayflower.de>
 * @copyright 2007-2010 Mayflower GmbH
 * @license   http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version   SVN: $Id$
 * @link      http://www.phpunit.de/
 * @since     File available since  0.1.0
 */

require_once 'File/Iterator/Factory.php';

/**
 * CbIssueXML
 *
 * This class is a wrapper around DOMDocument to provide additional features
 * like simple xpath queries.
 * It is used to merge issue XML files and execute plugins
 * against it to retrieve the issues from them.
 *
 * @category  PHP_CodeBrowser
 * @package   PHP_CodeBrowser
 * @author    Elger Thiele <elger.thiele@mayflower.de>
 * @author    Michel Hartmann <michel.hartmann@mayflower.de>
 * @copyright 2007-2010 Mayflower GmbH
 * @license   http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version   Release: 1.0.2
 * @link      http://www.phpunit.de/
 * @since     Class available since  0.1.0
 */
class CbIssueXml extends DOMDocument
{
    /**
     *
     *
     * @var DOMXPath
     */
    protected $_xpath;

    /**
     * Do not preserve white spaces.
     * @see DOMDocument
     *
     * @var Boolean
     */
    public $preserveWhiteSpace = false;

    /**
     * Provide nice output.
     *
     * @var Boolean
     */
    public $formatOutput = true;

    /**
     * Default constructor
     *
     * @param String $version  The version definitio for DomDocument
     * @param String $encoding The used encoding for DomDocument
     */
    public function __construct($version = '1.0', $encoding = 'UTF-8')
    {
        parent::__construct($version, $encoding);
        $this->appendChild(
            $this->createElement('codebrowser')
        );
    }

    /**
     * Parses directory for XML report files, generating a single DomDocument
     * inheritting all files and issues.
     *
     * @param String $directory The path to directory where xml files are stored
     *
     * @return CbIssueXml This object
     */
    public function addDirectory($directory)
    {
        $factory  = new File_Iterator_Factory;
        $iterator = $factory->getFileIterator($directory, 'xml');

        foreach ($iterator as $current) {
            $realFileName = realpath($current);
            $xml                  = new DOMDocument('1.0', 'UTF-8');
            $xml->validateOnParse = true;
            if (@$xml->load(realpath($current))) {
                $this->addXMLFile($xml);
            } else {
                error_log(
                    "[Warning] Could not read file '$realFileName'. "
                    . 'Make sure it contains valid xml.'
                );
            }
            unset($xml);
        }

        if (!$this->documentElement->hasChildNodes()) {
            error_log("[Warning] No valid log files found in '$directory'");
        }
        return $this;
    }

    /**
     * Add xml file to merge
     *
     * @param DOMDocument $domDocument The DOMDocument to merge.
     *
     * @return void
     */
    public function addXMLFile(DOMDocument $domDocument)
    {
        foreach ($domDocument->childNodes as $node) {
            $this->documentElement->appendChild($this->importNode($node, true));
        }
    }

    /**
     * Perform a XPath-Query on the document.
     * @see DOMXPath::query
     *
     * @param String  $expression  Xpath expression to query for.
     * @param DOMNode $contextNode Node to use as context (optional)
     *
     * @return DOMNodeList         List of all matching nodes.
     */
    public function query($expression, DOMNode $contextNode = null)
    {
        if (!isset($this->_xpath)) {
            $this->_xpath = new DOMXPath($this);
        }

        if ($contextNode) {
            $result = $this->_xpath->query($expression, $contextNode);
        } else {
            $result = $this->_xpath->query($expression);
        }
        return $result;
    }
}