Example #1
0
 /**
  * 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());
     }
 }