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[timetracker.git] / WEB-INF / lib / pear / PEAR / ChannelFile.php
diff --git a/WEB-INF/lib/pear/PEAR/ChannelFile.php b/WEB-INF/lib/pear/PEAR/ChannelFile.php
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+<?php
+/**
+ * PEAR_ChannelFile, the channel handling class
+ *
+ * PHP versions 4 and 5
+ *
+ * @category   pear
+ * @package    PEAR
+ * @author     Greg Beaver <cellog@php.net>
+ * @copyright  1997-2009 The Authors
+ * @license    http://opensource.org/licenses/bsd-license.php New BSD License
+ * @version    CVS: $Id: ChannelFile.php 313023 2011-07-06 19:17:11Z dufuz $
+ * @link       http://pear.php.net/package/PEAR
+ * @since      File available since Release 1.4.0a1
+ */
+
+/**
+ * Needed for error handling
+ */
+require_once 'PEAR/ErrorStack.php';
+require_once 'PEAR/XMLParser.php';
+require_once 'PEAR/Common.php';
+
+/**
+ * Error code if the channel.xml <channel> tag does not contain a valid version
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_VERSION', 1);
+/**
+ * Error code if the channel.xml <channel> tag version is not supported (version 1.0 is the only supported version,
+ * currently
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_VERSION', 2);
+
+/**
+ * Error code if parsing is attempted with no xml extension
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_XML_EXT', 3);
+
+/**
+ * Error code if creating the xml parser resource fails
+ */
+define('PEAR_CHANNELFILE_ERROR_CANT_MAKE_PARSER', 4);
+
+/**
+ * Error code used for all sax xml parsing errors
+ */
+define('PEAR_CHANNELFILE_ERROR_PARSER_ERROR', 5);
+
+/**#@+
+ * Validation errors
+ */
+/**
+ * Error code when channel name is missing
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_NAME', 6);
+/**
+ * Error code when channel name is invalid
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_NAME', 7);
+/**
+ * Error code when channel summary is missing
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_SUMMARY', 8);
+/**
+ * Error code when channel summary is multi-line
+ */
+define('PEAR_CHANNELFILE_ERROR_MULTILINE_SUMMARY', 9);
+/**
+ * Error code when channel server is missing for protocol
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_HOST', 10);
+/**
+ * Error code when channel server is invalid for protocol
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_HOST', 11);
+/**
+ * Error code when a mirror name is invalid
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_MIRROR', 21);
+/**
+ * Error code when a mirror type is invalid
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_MIRRORTYPE', 22);
+/**
+ * Error code when an attempt is made to generate xml, but the parsed content is invalid
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID', 23);
+/**
+ * Error code when an empty package name validate regex is passed in
+ */
+define('PEAR_CHANNELFILE_ERROR_EMPTY_REGEX', 24);
+/**
+ * Error code when a <function> tag has no version
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_FUNCTIONVERSION', 25);
+/**
+ * Error code when a <function> tag has no name
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_FUNCTIONNAME', 26);
+/**
+ * Error code when a <validatepackage> tag has no name
+ */
+define('PEAR_CHANNELFILE_ERROR_NOVALIDATE_NAME', 27);
+/**
+ * Error code when a <validatepackage> tag has no version attribute
+ */
+define('PEAR_CHANNELFILE_ERROR_NOVALIDATE_VERSION', 28);
+/**
+ * Error code when a mirror does not exist but is called for in one of the set*
+ * methods.
+ */
+define('PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND', 32);
+/**
+ * Error code when a server port is not numeric
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_PORT', 33);
+/**
+ * Error code when <static> contains no version attribute
+ */
+define('PEAR_CHANNELFILE_ERROR_NO_STATICVERSION', 34);
+/**
+ * Error code when <baseurl> contains no type attribute in a <rest> protocol definition
+ */
+define('PEAR_CHANNELFILE_ERROR_NOBASEURLTYPE', 35);
+/**
+ * Error code when a mirror is defined and the channel.xml represents the __uri pseudo-channel
+ */
+define('PEAR_CHANNELFILE_URI_CANT_MIRROR', 36);
+/**
+ * Error code when ssl attribute is present and is not "yes"
+ */
+define('PEAR_CHANNELFILE_ERROR_INVALID_SSL', 37);
+/**#@-*/
+
+/**
+ * Mirror types allowed.  Currently only internet servers are recognized.
+ */
+$GLOBALS['_PEAR_CHANNELS_MIRROR_TYPES'] =  array('server');
+
+
+/**
+ * The Channel handling class
+ *
+ * @category   pear
+ * @package    PEAR
+ * @author     Greg Beaver <cellog@php.net>
+ * @copyright  1997-2009 The Authors
+ * @license    http://opensource.org/licenses/bsd-license.php New BSD License
+ * @version    Release: 1.9.4
+ * @link       http://pear.php.net/package/PEAR
+ * @since      Class available since Release 1.4.0a1
+ */
+class PEAR_ChannelFile
+{
+    /**
+     * @access private
+     * @var PEAR_ErrorStack
+     * @access private
+     */
+    var $_stack;
+
+    /**
+     * Supported channel.xml versions, for parsing
+     * @var array
+     * @access private
+     */
+    var $_supportedVersions = array('1.0');
+
+    /**
+     * Parsed channel information
+     * @var array
+     * @access private
+     */
+    var $_channelInfo;
+
+    /**
+     * index into the subchannels array, used for parsing xml
+     * @var int
+     * @access private
+     */
+    var $_subchannelIndex;
+
+    /**
+     * index into the mirrors array, used for parsing xml
+     * @var int
+     * @access private
+     */
+    var $_mirrorIndex;
+
+    /**
+     * Flag used to determine the validity of parsed content
+     * @var boolean
+     * @access private
+     */
+    var $_isValid = false;
+
+    function PEAR_ChannelFile()
+    {
+        $this->_stack = &new PEAR_ErrorStack('PEAR_ChannelFile');
+        $this->_stack->setErrorMessageTemplate($this->_getErrorMessage());
+        $this->_isValid = false;
+    }
+
+    /**
+     * @return array
+     * @access protected
+     */
+    function _getErrorMessage()
+    {
+        return
+            array(
+                PEAR_CHANNELFILE_ERROR_INVALID_VERSION =>
+                    'While parsing channel.xml, an invalid version number "%version% was passed in, expecting one of %versions%',
+                PEAR_CHANNELFILE_ERROR_NO_VERSION =>
+                    'No version number found in <channel> tag',
+                PEAR_CHANNELFILE_ERROR_NO_XML_EXT =>
+                    '%error%',
+                PEAR_CHANNELFILE_ERROR_CANT_MAKE_PARSER =>
+                    'Unable to create XML parser',
+                PEAR_CHANNELFILE_ERROR_PARSER_ERROR =>
+                    '%error%',
+                PEAR_CHANNELFILE_ERROR_NO_NAME =>
+                    'Missing channel name',
+                PEAR_CHANNELFILE_ERROR_INVALID_NAME =>
+                    'Invalid channel %tag% "%name%"',
+                PEAR_CHANNELFILE_ERROR_NO_SUMMARY =>
+                    'Missing channel summary',
+                PEAR_CHANNELFILE_ERROR_MULTILINE_SUMMARY =>
+                    'Channel summary should be on one line, but is multi-line',
+                PEAR_CHANNELFILE_ERROR_NO_HOST =>
+                    'Missing channel server for %type% server',
+                PEAR_CHANNELFILE_ERROR_INVALID_HOST =>
+                    'Server name "%server%" is invalid for %type% server',
+                PEAR_CHANNELFILE_ERROR_INVALID_MIRROR =>
+                    'Invalid mirror name "%name%", mirror type %type%',
+                PEAR_CHANNELFILE_ERROR_INVALID_MIRRORTYPE =>
+                    'Invalid mirror type "%type%"',
+                PEAR_CHANNELFILE_ERROR_INVALID =>
+                    'Cannot generate xml, contents are invalid',
+                PEAR_CHANNELFILE_ERROR_EMPTY_REGEX =>
+                    'packagenameregex cannot be empty',
+                PEAR_CHANNELFILE_ERROR_NO_FUNCTIONVERSION =>
+                    '%parent% %protocol% function has no version',
+                PEAR_CHANNELFILE_ERROR_NO_FUNCTIONNAME =>
+                    '%parent% %protocol% function has no name',
+                PEAR_CHANNELFILE_ERROR_NOBASEURLTYPE =>
+                    '%parent% rest baseurl has no type',
+                PEAR_CHANNELFILE_ERROR_NOVALIDATE_NAME =>
+                    'Validation package has no name in <validatepackage> tag',
+                PEAR_CHANNELFILE_ERROR_NOVALIDATE_VERSION =>
+                    'Validation package "%package%" has no version',
+                PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND =>
+                    'Mirror "%mirror%" does not exist',
+                PEAR_CHANNELFILE_ERROR_INVALID_PORT =>
+                    'Port "%port%" must be numeric',
+                PEAR_CHANNELFILE_ERROR_NO_STATICVERSION =>
+                    '<static> tag must contain version attribute',
+                PEAR_CHANNELFILE_URI_CANT_MIRROR =>
+                    'The __uri pseudo-channel cannot have mirrors',
+                PEAR_CHANNELFILE_ERROR_INVALID_SSL =>
+                    '%server% has invalid ssl attribute "%ssl%" can only be yes or not present',
+            );
+    }
+
+    /**
+     * @param string contents of package.xml file
+     * @return bool success of parsing
+     */
+    function fromXmlString($data)
+    {
+        if (preg_match('/<channel\s+version="([0-9]+\.[0-9]+)"/', $data, $channelversion)) {
+            if (!in_array($channelversion[1], $this->_supportedVersions)) {
+                $this->_stack->push(PEAR_CHANNELFILE_ERROR_INVALID_VERSION, 'error',
+                    array('version' => $channelversion[1]));
+                return false;
+            }
+            $parser = new PEAR_XMLParser;
+            $result = $parser->parse($data);
+            if ($result !== true) {
+                if ($result->getCode() == 1) {
+                    $this->_stack->push(PEAR_CHANNELFILE_ERROR_NO_XML_EXT, 'error',
+                        array('error' => $result->getMessage()));
+                } else {
+                    $this->_stack->push(PEAR_CHANNELFILE_ERROR_CANT_MAKE_PARSER, 'error');
+                }
+                return false;
+            }
+            $this->_channelInfo = $parser->getData();
+            return true;
+        } else {
+            $this->_stack->push(PEAR_CHANNELFILE_ERROR_NO_VERSION, 'error', array('xml' => $data));
+            return false;
+        }
+    }
+
+    /**
+     * @return array
+     */
+    function toArray()
+    {
+        if (!$this->_isValid && !$this->validate()) {
+            return false;
+        }
+        return $this->_channelInfo;
+    }
+
+    /**
+     * @param array
+     * @static
+     * @return PEAR_ChannelFile|false false if invalid
+     */
+    function &fromArray($data, $compatibility = false, $stackClass = 'PEAR_ErrorStack')
+    {
+        $a = new PEAR_ChannelFile($compatibility, $stackClass);
+        $a->_fromArray($data);
+        if (!$a->validate()) {
+            $a = false;
+            return $a;
+        }
+        return $a;
+    }
+
+    /**
+     * Unlike {@link fromArray()} this does not do any validation
+     * @param array
+     * @static
+     * @return PEAR_ChannelFile
+     */
+    function &fromArrayWithErrors($data, $compatibility = false,
+                                  $stackClass = 'PEAR_ErrorStack')
+    {
+        $a = new PEAR_ChannelFile($compatibility, $stackClass);
+        $a->_fromArray($data);
+        return $a;
+    }
+
+    /**
+     * @param array
+     * @access private
+     */
+    function _fromArray($data)
+    {
+        $this->_channelInfo = $data;
+    }
+
+    /**
+     * Wrapper to {@link PEAR_ErrorStack::getErrors()}
+     * @param boolean determines whether to purge the error stack after retrieving
+     * @return array
+     */
+    function getErrors($purge = false)
+    {
+        return $this->_stack->getErrors($purge);
+    }
+
+    /**
+     * Unindent given string (?)
+     *
+     * @param string $str The string that has to be unindented.
+     * @return string
+     * @access private
+     */
+    function _unIndent($str)
+    {
+        // remove leading newlines
+        $str = preg_replace('/^[\r\n]+/', '', $str);
+        // find whitespace at the beginning of the first line
+        $indent_len = strspn($str, " \t");
+        $indent = substr($str, 0, $indent_len);
+        $data = '';
+        // remove the same amount of whitespace from following lines
+        foreach (explode("\n", $str) as $line) {
+            if (substr($line, 0, $indent_len) == $indent) {
+                $data .= substr($line, $indent_len) . "\n";
+            }
+        }
+        return $data;
+    }
+
+    /**
+     * Parse a channel.xml file.  Expects the name of
+     * a channel xml file as input.
+     *
+     * @param string  $descfile  name of channel xml file
+     * @return bool success of parsing
+     */
+    function fromXmlFile($descfile)
+    {
+        if (!file_exists($descfile) || !is_file($descfile) || !is_readable($descfile) ||
+             (!$fp = fopen($descfile, 'r'))) {
+            require_once 'PEAR.php';
+            return PEAR::raiseError("Unable to open $descfile");
+        }
+
+        // read the whole thing so we only get one cdata callback
+        // for each block of cdata
+        fclose($fp);
+        $data = file_get_contents($descfile);
+        return $this->fromXmlString($data);
+    }
+
+    /**
+     * Parse channel information from different sources
+     *
+     * This method is able to extract information about a channel
+     * from an .xml file or a string
+     *
+     * @access public
+     * @param  string Filename of the source or the source itself
+     * @return bool
+     */
+    function fromAny($info)
+    {
+        if (is_string($info) && file_exists($info) && strlen($info) < 255) {
+            $tmp = substr($info, -4);
+            if ($tmp == '.xml') {
+                $info = $this->fromXmlFile($info);
+            } else {
+                $fp = fopen($info, "r");
+                $test = fread($fp, 5);
+                fclose($fp);
+                if ($test == "<?xml") {
+                    $info = $this->fromXmlFile($info);
+                }
+            }
+            if (PEAR::isError($info)) {
+                require_once 'PEAR.php';
+                return PEAR::raiseError($info);
+            }
+        }
+        if (is_string($info)) {
+            $info = $this->fromXmlString($info);
+        }
+        return $info;
+    }
+
+    /**
+     * Return an XML document based on previous parsing and modifications
+     *
+     * @return string XML data
+     *
+     * @access public
+     */
+    function toXml()
+    {
+        if (!$this->_isValid && !$this->validate()) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID);
+            return false;
+        }
+        if (!isset($this->_channelInfo['attribs']['version'])) {
+            $this->_channelInfo['attribs']['version'] = '1.0';
+        }
+        $channelInfo = $this->_channelInfo;
+        $ret = "<?xml version=\"1.0\" encoding=\"ISO-8859-1\" ?>\n";
+        $ret .= "<channel version=\"" .
+            $channelInfo['attribs']['version'] . "\" xmlns=\"http://pear.php.net/channel-1.0\"
+  xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
+  xsi:schemaLocation=\"http://pear.php.net/dtd/channel-"
+            . $channelInfo['attribs']['version'] . " http://pear.php.net/dtd/channel-" .
+            $channelInfo['attribs']['version'] . ".xsd\">
+ <name>$channelInfo[name]</name>
+ <summary>" . htmlspecialchars($channelInfo['summary'])."</summary>
+";
+        if (isset($channelInfo['suggestedalias'])) {
+            $ret .= ' <suggestedalias>' . $channelInfo['suggestedalias'] . "</suggestedalias>\n";
+        }
+        if (isset($channelInfo['validatepackage'])) {
+            $ret .= ' <validatepackage version="' .
+                $channelInfo['validatepackage']['attribs']['version']. '">' .
+                htmlspecialchars($channelInfo['validatepackage']['_content']) .
+                "</validatepackage>\n";
+        }
+        $ret .= " <servers>\n";
+        $ret .= '  <primary';
+        if (isset($channelInfo['servers']['primary']['attribs']['ssl'])) {
+            $ret .= ' ssl="' . $channelInfo['servers']['primary']['attribs']['ssl'] . '"';
+        }
+        if (isset($channelInfo['servers']['primary']['attribs']['port'])) {
+            $ret .= ' port="' . $channelInfo['servers']['primary']['attribs']['port'] . '"';
+        }
+        $ret .= ">\n";
+        if (isset($channelInfo['servers']['primary']['rest'])) {
+            $ret .= $this->_makeRestXml($channelInfo['servers']['primary']['rest'], '   ');
+        }
+        $ret .= "  </primary>\n";
+        if (isset($channelInfo['servers']['mirror'])) {
+            $ret .= $this->_makeMirrorsXml($channelInfo);
+        }
+        $ret .= " </servers>\n";
+        $ret .= "</channel>";
+        return str_replace("\r", "\n", str_replace("\r\n", "\n", $ret));
+    }
+
+    /**
+     * Generate the <rest> tag
+     * @access private
+     */
+    function _makeRestXml($info, $indent)
+    {
+        $ret = $indent . "<rest>\n";
+        if (isset($info['baseurl']) && !isset($info['baseurl'][0])) {
+            $info['baseurl'] = array($info['baseurl']);
+        }
+
+        if (isset($info['baseurl'])) {
+            foreach ($info['baseurl'] as $url) {
+                $ret .= "$indent <baseurl type=\"" . $url['attribs']['type'] . "\"";
+                $ret .= ">" . $url['_content'] . "</baseurl>\n";
+            }
+        }
+        $ret .= $indent . "</rest>\n";
+        return $ret;
+    }
+
+    /**
+     * Generate the <mirrors> tag
+     * @access private
+     */
+    function _makeMirrorsXml($channelInfo)
+    {
+        $ret = "";
+        if (!isset($channelInfo['servers']['mirror'][0])) {
+            $channelInfo['servers']['mirror'] = array($channelInfo['servers']['mirror']);
+        }
+        foreach ($channelInfo['servers']['mirror'] as $mirror) {
+            $ret .= '  <mirror host="' . $mirror['attribs']['host'] . '"';
+            if (isset($mirror['attribs']['port'])) {
+                $ret .= ' port="' . $mirror['attribs']['port'] . '"';
+            }
+            if (isset($mirror['attribs']['ssl'])) {
+                $ret .= ' ssl="' . $mirror['attribs']['ssl'] . '"';
+            }
+            $ret .= ">\n";
+            if (isset($mirror['rest'])) {
+                if (isset($mirror['rest'])) {
+                    $ret .= $this->_makeRestXml($mirror['rest'], '   ');
+                }
+                $ret .= "  </mirror>\n";
+            } else {
+                $ret .= "/>\n";
+            }
+        }
+        return $ret;
+    }
+
+    /**
+     * Generate the <functions> tag
+     * @access private
+     */
+    function _makeFunctionsXml($functions, $indent, $rest = false)
+    {
+        $ret = '';
+        if (!isset($functions[0])) {
+            $functions = array($functions);
+        }
+        foreach ($functions as $function) {
+            $ret .= "$indent<function version=\"" . $function['attribs']['version'] . "\"";
+            if ($rest) {
+                $ret .= ' uri="' . $function['attribs']['uri'] . '"';
+            }
+            $ret .= ">" . $function['_content'] . "</function>\n";
+        }
+        return $ret;
+    }
+
+    /**
+     * Validation error.  Also marks the object contents as invalid
+     * @param error code
+     * @param array error information
+     * @access private
+     */
+    function _validateError($code, $params = array())
+    {
+        $this->_stack->push($code, 'error', $params);
+        $this->_isValid = false;
+    }
+
+    /**
+     * Validation warning.  Does not mark the object contents invalid.
+     * @param error code
+     * @param array error information
+     * @access private
+     */
+    function _validateWarning($code, $params = array())
+    {
+        $this->_stack->push($code, 'warning', $params);
+    }
+
+    /**
+     * Validate parsed file.
+     *
+     * @access public
+     * @return boolean
+     */
+    function validate()
+    {
+        $this->_isValid = true;
+        $info = $this->_channelInfo;
+        if (empty($info['name'])) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_NAME);
+        } elseif (!$this->validChannelServer($info['name'])) {
+            if ($info['name'] != '__uri') {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_NAME, array('tag' => 'name',
+                    'name' => $info['name']));
+            }
+        }
+        if (empty($info['summary'])) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_SUMMARY);
+        } elseif (strpos(trim($info['summary']), "\n") !== false) {
+            $this->_validateWarning(PEAR_CHANNELFILE_ERROR_MULTILINE_SUMMARY,
+                array('summary' => $info['summary']));
+        }
+        if (isset($info['suggestedalias'])) {
+            if (!$this->validChannelServer($info['suggestedalias'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_NAME,
+                    array('tag' => 'suggestedalias', 'name' =>$info['suggestedalias']));
+            }
+        }
+        if (isset($info['localalias'])) {
+            if (!$this->validChannelServer($info['localalias'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_NAME,
+                    array('tag' => 'localalias', 'name' =>$info['localalias']));
+            }
+        }
+        if (isset($info['validatepackage'])) {
+            if (!isset($info['validatepackage']['_content'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_NOVALIDATE_NAME);
+            }
+            if (!isset($info['validatepackage']['attribs']['version'])) {
+                $content = isset($info['validatepackage']['_content']) ?
+                    $info['validatepackage']['_content'] :
+                    null;
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_NOVALIDATE_VERSION,
+                    array('package' => $content));
+            }
+        }
+
+        if (isset($info['servers']['primary']['attribs'], $info['servers']['primary']['attribs']['port']) &&
+              !is_numeric($info['servers']['primary']['attribs']['port'])) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_PORT,
+                array('port' => $info['servers']['primary']['attribs']['port']));
+        }
+
+        if (isset($info['servers']['primary']['attribs'], $info['servers']['primary']['attribs']['ssl']) &&
+              $info['servers']['primary']['attribs']['ssl'] != 'yes') {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_SSL,
+                array('ssl' => $info['servers']['primary']['attribs']['ssl'],
+                    'server' => $info['name']));
+        }
+
+        if (isset($info['servers']['primary']['rest']) &&
+              isset($info['servers']['primary']['rest']['baseurl'])) {
+            $this->_validateFunctions('rest', $info['servers']['primary']['rest']['baseurl']);
+        }
+        if (isset($info['servers']['mirror'])) {
+            if ($this->_channelInfo['name'] == '__uri') {
+                $this->_validateError(PEAR_CHANNELFILE_URI_CANT_MIRROR);
+            }
+            if (!isset($info['servers']['mirror'][0])) {
+                $info['servers']['mirror'] = array($info['servers']['mirror']);
+            }
+            foreach ($info['servers']['mirror'] as $mirror) {
+                if (!isset($mirror['attribs']['host'])) {
+                    $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_HOST,
+                      array('type' => 'mirror'));
+                } elseif (!$this->validChannelServer($mirror['attribs']['host'])) {
+                    $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_HOST,
+                        array('server' => $mirror['attribs']['host'], 'type' => 'mirror'));
+                }
+                if (isset($mirror['attribs']['ssl']) && $mirror['attribs']['ssl'] != 'yes') {
+                    $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_SSL,
+                        array('ssl' => $info['ssl'], 'server' => $mirror['attribs']['host']));
+                }
+                if (isset($mirror['rest'])) {
+                    $this->_validateFunctions('rest', $mirror['rest']['baseurl'],
+                        $mirror['attribs']['host']);
+                }
+            }
+        }
+        return $this->_isValid;
+    }
+
+    /**
+     * @param string  rest - protocol name this function applies to
+     * @param array the functions
+     * @param string the name of the parent element (mirror name, for instance)
+     */
+    function _validateFunctions($protocol, $functions, $parent = '')
+    {
+        if (!isset($functions[0])) {
+            $functions = array($functions);
+        }
+
+        foreach ($functions as $function) {
+            if (!isset($function['_content']) || empty($function['_content'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_FUNCTIONNAME,
+                    array('parent' => $parent, 'protocol' => $protocol));
+            }
+
+            if ($protocol == 'rest') {
+                if (!isset($function['attribs']['type']) ||
+                      empty($function['attribs']['type'])) {
+                    $this->_validateError(PEAR_CHANNELFILE_ERROR_NOBASEURLTYPE,
+                        array('parent' => $parent, 'protocol' => $protocol));
+                }
+            } else {
+                if (!isset($function['attribs']['version']) ||
+                      empty($function['attribs']['version'])) {
+                    $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_FUNCTIONVERSION,
+                        array('parent' => $parent, 'protocol' => $protocol));
+                }
+            }
+        }
+    }
+
+    /**
+     * Test whether a string contains a valid channel server.
+     * @param string $ver the package version to test
+     * @return bool
+     */
+    function validChannelServer($server)
+    {
+        if ($server == '__uri') {
+            return true;
+        }
+        return (bool) preg_match(PEAR_CHANNELS_SERVER_PREG, $server);
+    }
+
+    /**
+     * @return string|false
+     */
+    function getName()
+    {
+        if (isset($this->_channelInfo['name'])) {
+            return $this->_channelInfo['name'];
+        }
+
+        return false;
+    }
+
+    /**
+     * @return string|false
+     */
+    function getServer()
+    {
+        if (isset($this->_channelInfo['name'])) {
+            return $this->_channelInfo['name'];
+        }
+
+        return false;
+    }
+
+    /**
+     * @return int|80 port number to connect to
+     */
+    function getPort($mirror = false)
+    {
+        if ($mirror) {
+            if ($mir = $this->getMirror($mirror)) {
+                if (isset($mir['attribs']['port'])) {
+                    return $mir['attribs']['port'];
+                }
+
+                if ($this->getSSL($mirror)) {
+                    return 443;
+                }
+
+                return 80;
+            }
+
+            return false;
+        }
+
+        if (isset($this->_channelInfo['servers']['primary']['attribs']['port'])) {
+            return $this->_channelInfo['servers']['primary']['attribs']['port'];
+        }
+
+        if ($this->getSSL()) {
+            return 443;
+        }
+
+        return 80;
+    }
+
+    /**
+     * @return bool Determines whether secure sockets layer (SSL) is used to connect to this channel
+     */
+    function getSSL($mirror = false)
+    {
+        if ($mirror) {
+            if ($mir = $this->getMirror($mirror)) {
+                if (isset($mir['attribs']['ssl'])) {
+                    return true;
+                }
+
+                return false;
+            }
+
+            return false;
+        }
+
+        if (isset($this->_channelInfo['servers']['primary']['attribs']['ssl'])) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * @return string|false
+     */
+    function getSummary()
+    {
+        if (isset($this->_channelInfo['summary'])) {
+            return $this->_channelInfo['summary'];
+        }
+
+        return false;
+    }
+
+    /**
+     * @param string protocol type
+     * @param string Mirror name
+     * @return array|false
+     */
+    function getFunctions($protocol, $mirror = false)
+    {
+        if ($this->getName() == '__uri') {
+            return false;
+        }
+
+        $function = $protocol == 'rest' ? 'baseurl' : 'function';
+        if ($mirror) {
+            if ($mir = $this->getMirror($mirror)) {
+                if (isset($mir[$protocol][$function])) {
+                    return $mir[$protocol][$function];
+                }
+            }
+
+            return false;
+        }
+
+        if (isset($this->_channelInfo['servers']['primary'][$protocol][$function])) {
+            return $this->_channelInfo['servers']['primary'][$protocol][$function];
+        }
+
+        return false;
+    }
+
+    /**
+     * @param string Protocol type
+     * @param string Function name (null to return the
+     *               first protocol of the type requested)
+     * @param string Mirror name, if any
+     * @return array
+     */
+     function getFunction($type, $name = null, $mirror = false)
+     {
+        $protocols = $this->getFunctions($type, $mirror);
+        if (!$protocols) {
+            return false;
+        }
+
+        foreach ($protocols as $protocol) {
+            if ($name === null) {
+                return $protocol;
+            }
+
+            if ($protocol['_content'] != $name) {
+                continue;
+            }
+
+            return $protocol;
+        }
+
+        return false;
+     }
+
+    /**
+     * @param string protocol type
+     * @param string protocol name
+     * @param string version
+     * @param string mirror name
+     * @return boolean
+     */
+    function supports($type, $name = null, $mirror = false, $version = '1.0')
+    {
+        $protocols = $this->getFunctions($type, $mirror);
+        if (!$protocols) {
+            return false;
+        }
+
+        foreach ($protocols as $protocol) {
+            if ($protocol['attribs']['version'] != $version) {
+                continue;
+            }
+
+            if ($name === null) {
+                return true;
+            }
+
+            if ($protocol['_content'] != $name) {
+                continue;
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Determines whether a channel supports Representational State Transfer (REST) protocols
+     * for retrieving channel information
+     * @param string
+     * @return bool
+     */
+    function supportsREST($mirror = false)
+    {
+        if ($mirror == $this->_channelInfo['name']) {
+            $mirror = false;
+        }
+
+        if ($mirror) {
+            if ($mir = $this->getMirror($mirror)) {
+                return isset($mir['rest']);
+            }
+
+            return false;
+        }
+
+        return isset($this->_channelInfo['servers']['primary']['rest']);
+    }
+
+    /**
+     * Get the URL to access a base resource.
+     *
+     * Hyperlinks in the returned xml will be used to retrieve the proper information
+     * needed.  This allows extreme extensibility and flexibility in implementation
+     * @param string Resource Type to retrieve
+     */
+    function getBaseURL($resourceType, $mirror = false)
+    {
+        if ($mirror == $this->_channelInfo['name']) {
+            $mirror = false;
+        }
+
+        if ($mirror) {
+            $mir = $this->getMirror($mirror);
+            if (!$mir) {
+                return false;
+            }
+
+            $rest = $mir['rest'];
+        } else {
+            $rest = $this->_channelInfo['servers']['primary']['rest'];
+        }
+
+        if (!isset($rest['baseurl'][0])) {
+            $rest['baseurl'] = array($rest['baseurl']);
+        }
+
+        foreach ($rest['baseurl'] as $baseurl) {
+            if (strtolower($baseurl['attribs']['type']) == strtolower($resourceType)) {
+                return $baseurl['_content'];
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Since REST does not implement RPC, provide this as a logical wrapper around
+     * resetFunctions for REST
+     * @param string|false mirror name, if any
+     */
+    function resetREST($mirror = false)
+    {
+        return $this->resetFunctions('rest', $mirror);
+    }
+
+    /**
+     * Empty all protocol definitions
+     * @param string protocol type
+     * @param string|false mirror name, if any
+     */
+    function resetFunctions($type, $mirror = false)
+    {
+        if ($mirror) {
+            if (isset($this->_channelInfo['servers']['mirror'])) {
+                $mirrors = $this->_channelInfo['servers']['mirror'];
+                if (!isset($mirrors[0])) {
+                    $mirrors = array($mirrors);
+                }
+
+                foreach ($mirrors as $i => $mir) {
+                    if ($mir['attribs']['host'] == $mirror) {
+                        if (isset($this->_channelInfo['servers']['mirror'][$i][$type])) {
+                            unset($this->_channelInfo['servers']['mirror'][$i][$type]);
+                        }
+
+                        return true;
+                    }
+                }
+
+                return false;
+            }
+
+            return false;
+        }
+
+        if (isset($this->_channelInfo['servers']['primary'][$type])) {
+            unset($this->_channelInfo['servers']['primary'][$type]);
+        }
+
+        return true;
+    }
+
+    /**
+     * Set a channel's protocols to the protocols supported by pearweb
+     */
+    function setDefaultPEARProtocols($version = '1.0', $mirror = false)
+    {
+        switch ($version) {
+            case '1.0' :
+                $this->resetREST($mirror);
+
+                if (!isset($this->_channelInfo['servers'])) {
+                    $this->_channelInfo['servers'] = array('primary' =>
+                        array('rest' => array()));
+                } elseif (!isset($this->_channelInfo['servers']['primary'])) {
+                    $this->_channelInfo['servers']['primary'] = array('rest' => array());
+                }
+
+                return true;
+            break;
+            default :
+                return false;
+            break;
+        }
+    }
+
+    /**
+     * @return array
+     */
+    function getMirrors()
+    {
+        if (isset($this->_channelInfo['servers']['mirror'])) {
+            $mirrors = $this->_channelInfo['servers']['mirror'];
+            if (!isset($mirrors[0])) {
+                $mirrors = array($mirrors);
+            }
+
+            return $mirrors;
+        }
+
+        return array();
+    }
+
+    /**
+     * Get the unserialized XML representing a mirror
+     * @return array|false
+     */
+    function getMirror($server)
+    {
+        foreach ($this->getMirrors() as $mirror) {
+            if ($mirror['attribs']['host'] == $server) {
+                return $mirror;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * @param string
+     * @return string|false
+     * @error PEAR_CHANNELFILE_ERROR_NO_NAME
+     * @error PEAR_CHANNELFILE_ERROR_INVALID_NAME
+     */
+    function setName($name)
+    {
+        return $this->setServer($name);
+    }
+
+    /**
+     * Set the socket number (port) that is used to connect to this channel
+     * @param integer
+     * @param string|false name of the mirror server, or false for the primary
+     */
+    function setPort($port, $mirror = false)
+    {
+        if ($mirror) {
+            if (!isset($this->_channelInfo['servers']['mirror'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND,
+                    array('mirror' => $mirror));
+                return false;
+            }
+
+            if (isset($this->_channelInfo['servers']['mirror'][0])) {
+                foreach ($this->_channelInfo['servers']['mirror'] as $i => $mir) {
+                    if ($mirror == $mir['attribs']['host']) {
+                        $this->_channelInfo['servers']['mirror'][$i]['attribs']['port'] = $port;
+                        return true;
+                    }
+                }
+
+                return false;
+            } elseif ($this->_channelInfo['servers']['mirror']['attribs']['host'] == $mirror) {
+                $this->_channelInfo['servers']['mirror']['attribs']['port'] = $port;
+                $this->_isValid = false;
+                return true;
+            }
+        }
+
+        $this->_channelInfo['servers']['primary']['attribs']['port'] = $port;
+        $this->_isValid = false;
+        return true;
+    }
+
+    /**
+     * Set the socket number (port) that is used to connect to this channel
+     * @param bool Determines whether to turn on SSL support or turn it off
+     * @param string|false name of the mirror server, or false for the primary
+     */
+    function setSSL($ssl = true, $mirror = false)
+    {
+        if ($mirror) {
+            if (!isset($this->_channelInfo['servers']['mirror'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND,
+                    array('mirror' => $mirror));
+                return false;
+            }
+
+            if (isset($this->_channelInfo['servers']['mirror'][0])) {
+                foreach ($this->_channelInfo['servers']['mirror'] as $i => $mir) {
+                    if ($mirror == $mir['attribs']['host']) {
+                        if (!$ssl) {
+                            if (isset($this->_channelInfo['servers']['mirror'][$i]
+                                  ['attribs']['ssl'])) {
+                                unset($this->_channelInfo['servers']['mirror'][$i]['attribs']['ssl']);
+                            }
+                        } else {
+                            $this->_channelInfo['servers']['mirror'][$i]['attribs']['ssl'] = 'yes';
+                        }
+
+                        return true;
+                    }
+                }
+
+                return false;
+            } elseif ($this->_channelInfo['servers']['mirror']['attribs']['host'] == $mirror) {
+                if (!$ssl) {
+                    if (isset($this->_channelInfo['servers']['mirror']['attribs']['ssl'])) {
+                        unset($this->_channelInfo['servers']['mirror']['attribs']['ssl']);
+                    }
+                } else {
+                    $this->_channelInfo['servers']['mirror']['attribs']['ssl'] = 'yes';
+                }
+
+                $this->_isValid = false;
+                return true;
+            }
+        }
+
+        if ($ssl) {
+            $this->_channelInfo['servers']['primary']['attribs']['ssl'] = 'yes';
+        } else {
+            if (isset($this->_channelInfo['servers']['primary']['attribs']['ssl'])) {
+                unset($this->_channelInfo['servers']['primary']['attribs']['ssl']);
+            }
+        }
+
+        $this->_isValid = false;
+        return true;
+    }
+
+    /**
+     * @param string
+     * @return string|false
+     * @error PEAR_CHANNELFILE_ERROR_NO_SERVER
+     * @error PEAR_CHANNELFILE_ERROR_INVALID_SERVER
+     */
+    function setServer($server, $mirror = false)
+    {
+        if (empty($server)) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_SERVER);
+            return false;
+        } elseif (!$this->validChannelServer($server)) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_NAME,
+                array('tag' => 'name', 'name' => $server));
+            return false;
+        }
+
+        if ($mirror) {
+            $found = false;
+            foreach ($this->_channelInfo['servers']['mirror'] as $i => $mir) {
+                if ($mirror == $mir['attribs']['host']) {
+                    $found = true;
+                    break;
+                }
+            }
+
+            if (!$found) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND,
+                    array('mirror' => $mirror));
+                return false;
+            }
+
+            $this->_channelInfo['mirror'][$i]['attribs']['host'] = $server;
+            return true;
+        }
+
+        $this->_channelInfo['name'] = $server;
+        return true;
+    }
+
+    /**
+     * @param string
+     * @return boolean success
+     * @error PEAR_CHANNELFILE_ERROR_NO_SUMMARY
+     * @warning PEAR_CHANNELFILE_ERROR_MULTILINE_SUMMARY
+     */
+    function setSummary($summary)
+    {
+        if (empty($summary)) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_NO_SUMMARY);
+            return false;
+        } elseif (strpos(trim($summary), "\n") !== false) {
+            $this->_validateWarning(PEAR_CHANNELFILE_ERROR_MULTILINE_SUMMARY,
+                array('summary' => $summary));
+        }
+
+        $this->_channelInfo['summary'] = $summary;
+        return true;
+    }
+
+    /**
+     * @param string
+     * @param boolean determines whether the alias is in channel.xml or local
+     * @return boolean success
+     */
+    function setAlias($alias, $local = false)
+    {
+        if (!$this->validChannelServer($alias)) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_INVALID_NAME,
+                array('tag' => 'suggestedalias', 'name' => $alias));
+            return false;
+        }
+
+        if ($local) {
+            $this->_channelInfo['localalias'] = $alias;
+        } else {
+            $this->_channelInfo['suggestedalias'] = $alias;
+        }
+
+        return true;
+    }
+
+    /**
+     * @return string
+     */
+    function getAlias()
+    {
+        if (isset($this->_channelInfo['localalias'])) {
+            return $this->_channelInfo['localalias'];
+        }
+        if (isset($this->_channelInfo['suggestedalias'])) {
+            return $this->_channelInfo['suggestedalias'];
+        }
+        if (isset($this->_channelInfo['name'])) {
+            return $this->_channelInfo['name'];
+        }
+        return '';
+    }
+
+    /**
+     * Set the package validation object if it differs from PEAR's default
+     * The class must be includeable via changing _ in the classname to path separator,
+     * but no checking of this is made.
+     * @param string|false pass in false to reset to the default packagename regex
+     * @return boolean success
+     */
+    function setValidationPackage($validateclass, $version)
+    {
+        if (empty($validateclass)) {
+            unset($this->_channelInfo['validatepackage']);
+        }
+        $this->_channelInfo['validatepackage'] = array('_content' => $validateclass);
+        $this->_channelInfo['validatepackage']['attribs'] = array('version' => $version);
+    }
+
+    /**
+     * Add a protocol to the provides section
+     * @param string protocol type
+     * @param string protocol version
+     * @param string protocol name, if any
+     * @param string mirror name, if this is a mirror's protocol
+     * @return bool
+     */
+    function addFunction($type, $version, $name = '', $mirror = false)
+    {
+        if ($mirror) {
+            return $this->addMirrorFunction($mirror, $type, $version, $name);
+        }
+
+        $set = array('attribs' => array('version' => $version), '_content' => $name);
+        if (!isset($this->_channelInfo['servers']['primary'][$type]['function'])) {
+            if (!isset($this->_channelInfo['servers'])) {
+                $this->_channelInfo['servers'] = array('primary' =>
+                    array($type => array()));
+            } elseif (!isset($this->_channelInfo['servers']['primary'])) {
+                $this->_channelInfo['servers']['primary'] = array($type => array());
+            }
+
+            $this->_channelInfo['servers']['primary'][$type]['function'] = $set;
+            $this->_isValid = false;
+            return true;
+        } elseif (!isset($this->_channelInfo['servers']['primary'][$type]['function'][0])) {
+            $this->_channelInfo['servers']['primary'][$type]['function'] = array(
+                $this->_channelInfo['servers']['primary'][$type]['function']);
+        }
+
+        $this->_channelInfo['servers']['primary'][$type]['function'][] = $set;
+        return true;
+    }
+    /**
+     * Add a protocol to a mirror's provides section
+     * @param string mirror name (server)
+     * @param string protocol type
+     * @param string protocol version
+     * @param string protocol name, if any
+     */
+    function addMirrorFunction($mirror, $type, $version, $name = '')
+    {
+        if (!isset($this->_channelInfo['servers']['mirror'])) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND,
+                array('mirror' => $mirror));
+            return false;
+        }
+
+        $setmirror = false;
+        if (isset($this->_channelInfo['servers']['mirror'][0])) {
+            foreach ($this->_channelInfo['servers']['mirror'] as $i => $mir) {
+                if ($mirror == $mir['attribs']['host']) {
+                    $setmirror = &$this->_channelInfo['servers']['mirror'][$i];
+                    break;
+                }
+            }
+        } else {
+            if ($this->_channelInfo['servers']['mirror']['attribs']['host'] == $mirror) {
+                $setmirror = &$this->_channelInfo['servers']['mirror'];
+            }
+        }
+
+        if (!$setmirror) {
+            $this->_validateError(PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND,
+                array('mirror' => $mirror));
+            return false;
+        }
+
+        $set = array('attribs' => array('version' => $version), '_content' => $name);
+        if (!isset($setmirror[$type]['function'])) {
+            $setmirror[$type]['function'] = $set;
+            $this->_isValid = false;
+            return true;
+        } elseif (!isset($setmirror[$type]['function'][0])) {
+            $setmirror[$type]['function'] = array($setmirror[$type]['function']);
+        }
+
+        $setmirror[$type]['function'][] = $set;
+        $this->_isValid = false;
+        return true;
+    }
+
+    /**
+     * @param string Resource Type this url links to
+     * @param string URL
+     * @param string|false mirror name, if this is not a primary server REST base URL
+     */
+    function setBaseURL($resourceType, $url, $mirror = false)
+    {
+        if ($mirror) {
+            if (!isset($this->_channelInfo['servers']['mirror'])) {
+                $this->_validateError(PEAR_CHANNELFILE_ERROR_MIRROR_NOT_FOUND,
+                    array('mirror' => $mirror));
+                return false;
+            }
+
+            $setmirror = false;
+            if (isset($this->_channelInfo['servers']['mirror'][0])) {
+                foreach ($this->_channelInfo['servers']['mirror'] as $i => $mir) {
+                    if ($mirror == $mir['attribs']['host']) {
+                        $setmirror = &$this->_channelInfo['servers']['mirror'][$i];
+                        break;
+                    }
+                }
+            } else {
+                if ($this->_channelInfo['servers']['mirror']['attribs']['host'] == $mirror) {
+                    $setmirror = &$this->_channelInfo['servers']['mirror'];
+                }
+            }
+        } else {
+            $setmirror = &$this->_channelInfo['servers']['primary'];
+        }
+
+        $set = array('attribs' => array('type' => $resourceType), '_content' => $url);
+        if (!isset($setmirror['rest'])) {
+            $setmirror['rest'] = array();
+        }
+
+        if (!isset($setmirror['rest']['baseurl'])) {
+            $setmirror['rest']['baseurl'] = $set;
+            $this->_isValid = false;
+            return true;
+        } elseif (!isset($setmirror['rest']['baseurl'][0])) {
+            $setmirror['rest']['baseurl'] = array($setmirror['rest']['baseurl']);
+        }
+
+        foreach ($setmirror['rest']['baseurl'] as $i => $url) {
+            if ($url['attribs']['type'] == $resourceType) {
+                $this->_isValid = false;
+                $setmirror['rest']['baseurl'][$i] = $set;
+                return true;
+            }
+        }
+
+        $setmirror['rest']['baseurl'][] = $set;
+        $this->_isValid = false;
+        return true;
+    }
+
+    /**
+     * @param string mirror server
+     * @param int mirror http port
+     * @return boolean
+     */
+    function addMirror($server, $port = null)
+    {
+        if ($this->_channelInfo['name'] == '__uri') {
+            return false; // the __uri channel cannot have mirrors by definition
+        }
+
+        $set = array('attribs' => array('host' => $server));
+        if (is_numeric($port)) {
+            $set['attribs']['port'] = $port;
+        }
+
+        if (!isset($this->_channelInfo['servers']['mirror'])) {
+            $this->_channelInfo['servers']['mirror'] = $set;
+            return true;
+        }
+
+        if (!isset($this->_channelInfo['servers']['mirror'][0])) {
+            $this->_channelInfo['servers']['mirror'] =
+                array($this->_channelInfo['servers']['mirror']);
+        }
+
+        $this->_channelInfo['servers']['mirror'][] = $set;
+        return true;
+    }
+
+    /**
+     * Retrieve the name of the validation package for this channel
+     * @return string|false
+     */
+    function getValidationPackage()
+    {
+        if (!$this->_isValid && !$this->validate()) {
+            return false;
+        }
+
+        if (!isset($this->_channelInfo['validatepackage'])) {
+            return array('attribs' => array('version' => 'default'),
+                '_content' => 'PEAR_Validate');
+        }
+
+        return $this->_channelInfo['validatepackage'];
+    }
+
+    /**
+     * Retrieve the object that can be used for custom validation
+     * @param string|false the name of the package to validate.  If the package is
+     *                     the channel validation package, PEAR_Validate is returned
+     * @return PEAR_Validate|false false is returned if the validation package
+     *         cannot be located
+     */
+    function &getValidationObject($package = false)
+    {
+        if (!class_exists('PEAR_Validate')) {
+            require_once 'PEAR/Validate.php';
+        }
+
+        if (!$this->_isValid) {
+            if (!$this->validate()) {
+                $a = false;
+                return $a;
+            }
+        }
+
+        if (isset($this->_channelInfo['validatepackage'])) {
+            if ($package == $this->_channelInfo['validatepackage']) {
+                // channel validation packages are always validated by PEAR_Validate
+                $val = &new PEAR_Validate;
+                return $val;
+            }
+
+            if (!class_exists(str_replace('.', '_',
+                  $this->_channelInfo['validatepackage']['_content']))) {
+                if ($this->isIncludeable(str_replace('_', '/',
+                      $this->_channelInfo['validatepackage']['_content']) . '.php')) {
+                    include_once str_replace('_', '/',
+                        $this->_channelInfo['validatepackage']['_content']) . '.php';
+                    $vclass = str_replace('.', '_',
+                        $this->_channelInfo['validatepackage']['_content']);
+                    $val = &new $vclass;
+                } else {
+                    $a = false;
+                    return $a;
+                }
+            } else {
+                $vclass = str_replace('.', '_',
+                    $this->_channelInfo['validatepackage']['_content']);
+                $val = &new $vclass;
+            }
+        } else {
+            $val = &new PEAR_Validate;
+        }
+
+        return $val;
+    }
+
+    function isIncludeable($path)
+    {
+        $possibilities = explode(PATH_SEPARATOR, ini_get('include_path'));
+        foreach ($possibilities as $dir) {
+            if (file_exists($dir . DIRECTORY_SEPARATOR . $path)
+                  && is_readable($dir . DIRECTORY_SEPARATOR . $path)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * This function is used by the channel updater and retrieves a value set by
+     * the registry, or the current time if it has not been set
+     * @return string
+     */
+    function lastModified()
+    {
+        if (isset($this->_channelInfo['_lastmodified'])) {
+            return $this->_channelInfo['_lastmodified'];
+        }
+
+        return time();
+    }
+}
\ No newline at end of file