public function testCreateProcessorNoProcessor()
{
$expression = $this->createComponentFromXml('
<sum>
<baseValue baseType="integer">1</baseValue>
<baseValue baseType="integer">1</baseValue>
</sum>');
$factory = new ExpressionProcessorFactory();
$this->setExpectedException('\\RuntimeException');
$processor = $factory->createProcessor($expression);
}
/**
* Process the current Expression object according to the current
* execution context.
*
* @throws ExpressionProcessingException|OperatorProcessingException If an error occurs during the Expression processing.
*/
public function process()
{
$expression = $this->getComponent();
// Reset trail and marker arrays.
$this->trail = array();
$this->marker = array();
$this->pushTrail($expression);
while (count($this->getTrail()) > 0) {
$expression = $this->popTrail();
if ($this->isMarked($expression) === false && $expression instanceof Operator) {
// This is an operator, first pass. Repush for a second pass.
$this->mark($expression);
$this->pushTrail($expression);
$this->pushTrail($expression->getExpressions());
} else {
if ($this->isMarked($expression)) {
// Operator, second pass. Process it.
$popCount = count($expression->getExpressions());
$operands = $this->operands->pop($popCount);
$processor = $this->operatorProcessorFactory->createProcessor($expression, $operands);
$processor->setState($this->getContext());
$result = $processor->process();
// trace the processing of the operator.
$qtiName = $expression->getQtiClassName();
$trace = "Operator '{$qtiName}' processed.";
$this->traceOperator($processor, $result);
if ($expression !== $this->getComponent()) {
$this->operands->push($result);
}
} else {
// Simple expression, process it.
$processor = $this->expressionProcessorFactory->createProcessor($expression);
$processor->setState($this->getContext());
$result = $processor->process();
$this->operands->push($result);
// trace the processing of the expression.
$qtiName = $expression->getQtiClassName();
$trace = "Expression '{$qtiName}' processed.";
$this->traceExpression($processor, $result);
}
}
}
return $result;
}
/**
* Create a new OperatorProcessorFactory object.
*
*/
public function __construct()
{
parent::__construct();
}
