/**
* Retrieves an element or DOMIT_NodeList of elements corresponding to an Xpath-like expression.
* @param string The query pattern
* @param int If a single node is to be returned (rather than the entire NodeList) the index of that node
* @return mixed A NodeList or single node that matches the pattern
*/
function &getElementsByPath($pattern, $nodeIndex = 0)
{
require_once DOMIT_INCLUDE_PATH . 'xml_domit_getelementsbypath.php';
$gebp = new DOMIT_GetElementsByPath();
$myResponse =& $gebp->parsePattern($this, $pattern, $nodeIndex);
return $myResponse;
}
/**
* Matches the current path segment against the child nodes of the current context node
* @param Object The context node
* @param string The pattern
* @param int The index of the current path segment
*/
function &parsePattern(&$node, $pattern, $nodeIndex = 0)
{
$beginSquareBrackets = strpos($pattern, '[');
if ($beginSquareBrackets != 0) {
$path = substr($pattern, 0, $beginSquareBrackets);
$attrPattern = substr($pattern, strpos($pattern, '@') + 1);
$attrPattern = substr($attrPattern, 0, strpos($attrPattern, ')'));
$commaIndex = strpos($attrPattern, ',');
$key = trim(substr($attrPattern, 0, $commaIndex));
$value = trim(substr($attrPattern, $commaIndex + 1));
$value = substr($value, 1, strlen($value) - 2);
$gebp = new DOMIT_GetElementsByPath();
$myResponse =& $gebp->parsePattern($node, $path);
$total = $myResponse->getLength();
for ($i = 0; $i < $total; $i++) {
$currNode =& $myResponse->item($i);
if ($currNode->hasAttribute($key)) {
if ($currNode->getAttribute($key) == $value) {
$this->nodeList->appendNode($currNode);
}
}
}
}
if ($nodeIndex == 0) {
return $this->nodeList;
} else {
if ($nodeIndex <= $this->nodeList->getLength()) {
return $this->nodeList->item($nodeIndex - 1);
} else {
$this->nodeList = new DOMIT_NodeList();
return $this->nodeList;
}
}
}