/**
* Marshall a QTI directedPair datatype into its PCI JSON Representation.
*
* @param \qtism\common\datatypes\DirectedPair $directedPair
* @return array
*/
protected function marshallDirectedPair(QtiDirectedPair $directedPair)
{
return array('base' => array('directedPair' => array($directedPair->getFirst(), $directedPair->getSecond())));
}
private function assertDirectPair(QtiDirectedPair $pair, $expectedFirstValue, $expectedSecondValue)
{
$this->assertEquals($expectedFirstValue, $pair->getFirst());
$this->assertEquals($expectedSecondValue, $pair->getSecond());
}
/**
* Write a DirectedPair in the current binary stream.
*
* @param \qtism\common\datatypes\DirectedPair $directedPair A DirectedPair object.
* @throws \qtism\runtime\storage\binary\QtiBinaryStreamAccessException
*/
public function writeDirectedPair(QtiDirectedPair $directedPair)
{
try {
$this->writeString($directedPair->getFirst());
$this->writeString($directedPair->getSecond());
} catch (BinaryStreamAccessException $e) {
$msg = "An error occured while writing a directedPair.";
throw new QtiBinaryStreamAccessException($msg, $this, QtiBinaryStreamAccessException::DIRECTEDPAIR, $e);
}
}