/**
* Parse and generate PHP or custom (using custom expression provider) expression
* from the the given odata expression.
*
* @param string $text The text expression to parse
* @param ResourceType $resourceType The resource type in which
* expression will be applied
* @param IExpressionProvider $expressionProvider Implementation of IExpressionProvider
* if developer is using IDSQP2, null
* in-case of IDSQP which falls to default
* expression provider that is PHP expression
* provider
*
* @return InternalFilterInfo
*
* @throws ODataException If any error occurs while parsing the odata
* expression or building the php/custom expression.
*/
public static function parseExpression2($text, ResourceType $resourceType, $expressionProvider)
{
$isCustomExpressionProvider = !is_null($expressionProvider);
$expressionParser2 = new ExpressionParser2($text, $resourceType, $isCustomExpressionProvider);
$expressionTree = null;
try {
$expressionTree = $expressionParser2->parseFilter();
} catch (ODataException $odataException) {
throw $odataException;
}
$expressionProcessor = null;
$expressionAsString = null;
$filterFunction = null;
if (!$isCustomExpressionProvider) {
$expressionProvider = new PHPExpressionProvider('$lt');
}
$expressionProvider->setResourceType($resourceType);
$expressionProcessor = new ExpressionProcessor($expressionTree, $expressionProvider);
try {
$expressionAsString = $expressionProcessor->processExpression();
} catch (\InvalidArgumentException $invalidArgumentException) {
ODataException::createInternalServerError($invalidArgumentException->getMessage());
}
$navigationPropertiesUsed = empty($expressionParser2->_navigationPropertiesUsedInTheExpression) ? null : $expressionParser2->_navigationPropertiesUsedInTheExpression;
unset($expressionProcessor);
unset($expressionParser2);
if ($isCustomExpressionProvider) {
$filterFunction = new AnonymousFunction(array(), ' ODataException::createInternalServerError("Library will not perform filtering in case of custom IExpressionProvider"); ');
} else {
$filterFunction = new AnonymousFunction(array('$lt'), 'if(' . $expressionAsString . ') { return true; } else { return false;}');
}
return new InternalFilterInfo(new FilterInfo($navigationPropertiesUsed), $filterFunction, $expressionAsString, $isCustomExpressionProvider);
}
/**
* Parse the astoria filter expression, generate the same expression as PHP expression,
* retrieve only the entries which satisifes this expression.
*
* @param string $astoriaFilter
* @param ResourceType $resourceType
* @param array<objects> $entries
*
* @return array<objects>
*/
private function executeExpression($astoriaFilter, $resourceType, $entries)
{
try {
//Parse the Astoria filter query option to expression tree
$parser = new ExpressionParser2($astoriaFilter, $resourceType, null);
$expressionTree = $parser->parseFilter();
//emit the PHP expression corrosponds to Astoria filter query
$expressionProcessor = new ExpressionProcessor($expressionTree, new PHPExpressionProvider('$lt'));
$phpExpression = $expressionProcessor->processExpression();
//create an anonymous function with the generated PHP expression in if condition
$fun = create_function('$lt', 'if(' . $phpExpression . ') { return true; } else { return false;}');
$result = array();
foreach ($entries as $lt) {
//Filter out only the entries which satisifies the condition
if ($fun($lt)) {
$result[] = $lt;
}
}
return $result;
} catch (ODataException $exception) {
$this->fail('An unexpected ODataException has been raised.' . $exception->getMessage());
}
}