/**
* @param bool $asValue
*
* @return string
*/
public function getQueryString($asValue = false)
{
$comparator = QueryLanguage::getStringForComparator($this->comparator);
$dataValue = DataValueFactory::getInstance()->newDataItemValue($this->dataItem, $this->property);
if ($asValue) {
return $comparator . $dataValue->getWikiValue();
}
// this only is possible for values of Type:Page
if ($comparator === '') {
// some extra care for Category: pages
return '[[:' . $dataValue->getWikiValue() . ']]';
}
return '[[' . $comparator . $dataValue->getWikiValue() . ']]';
}
/**
* Helper function for getQueryDescription() that prepares a single value
* string, possibly extracting comparators. $value is changed to consist
* only of the remaining effective value string (without the comparator).
*
* @param string $value
* @param string $comparator
*/
protected static function prepareValue(&$value, &$comparator)
{
// Loop over the comparators to determine which one is used and what the actual value is.
foreach (SMWQueryLanguage::getComparatorStrings() as $string) {
if (strpos($value, $string) === 0) {
$comparator = SMWQueryLanguage::getComparatorFromString(substr($value, 0, strlen($string)));
$value = substr($value, strlen($string));
break;
}
}
}
/**
* Initializes the $comparators field.
*
* @since 1.5.3
*/
protected static function initializeComparators()
{
global $smwgQComparators, $smwStrictComparators;
static $initialized = false;
if ($initialized) {
return;
}
$initialized = true;
// Note: Comparators that contain other comparators at the beginning of the string need to be at beginning of the array.
$comparators = array('!~' => SMW_CMP_NLKE, '<<' => SMW_CMP_LESS, '>>' => SMW_CMP_GRTR, '<' => $smwStrictComparators ? SMW_CMP_LESS : SMW_CMP_LEQ, '>' => $smwStrictComparators ? SMW_CMP_GRTR : SMW_CMP_GEQ, '≤' => SMW_CMP_LEQ, '≥' => SMW_CMP_GEQ, '!' => SMW_CMP_NEQ, '~' => SMW_CMP_LIKE);
$allowedComparators = explode('|', $smwgQComparators);
// Remove the comparators that are not allowed.
foreach ($comparators as $string => $comparator) {
if (!in_array($string, $allowedComparators)) {
unset($comparators[$string]);
}
}
self::$comparators = $comparators;
}
