/**
* @see \qtism\data\storage\xml\marshalling\RecursiveMarshaller::unmarshallChildrenKnown()
*/
protected function unmarshallChildrenKnown(DOMElement $element, QtiComponentCollection $children)
{
$expressionElts = self::getChildElementsByTagName($element, Expression::getExpressionClassNames());
if (count($expressionElts) > 0) {
$marshaller = $this->getMarshallerFactory()->createMarshaller($expressionElts[0]);
$expression = $marshaller->unmarshall($expressionElts[0]);
} elseif (($element->localName == 'responseIf' || $element->localName == 'responseElseIf') && count($expressionElts) == 0) {
$msg = "A '" . $element->localName . "' must contain an 'expression' element. None found at line " . $element->getLineNo() . "'.";
throw new UnmarshallingException($msg, $element);
}
if ($element->localName == 'responseIf' || $element->localName == 'responseElseIf') {
$className = 'qtism\\data\\rules\\' . ucfirst($element->localName);
$class = new ReflectionClass($className);
$object = Reflection::newInstance($class, array($expression, $children));
} else {
$className = 'qtism\\data\\rules\\' . ucfirst($element->localName);
$class = new ReflectionClass($className);
$object = Reflection::newInstance($class, array($children));
}
return $object;
}
protected function instantiateMarshaller(ReflectionClass $class, array $args)
{
array_unshift($args, '2.0.0');
return Reflection::newInstance($class, $args);
}
public function testNewInstanceWithoutArguments()
{
$clazz = new ReflectionClass('\\stdClass');
$instance = Reflection::newInstance($clazz);
$this->assertInstanceOf('\\stdClass', $instance);
}
/**
* @see \qtism\data\storage\xml\marshalling\RecursiveMarshaller::unmarshallChildrenKnown()
*/
protected function unmarshallChildrenKnown(DOMElement $element, QtiComponentCollection $children)
{
// Some exceptions applies on instanciation e.g. the And operator is named
// AndOperator because of PHP reserved words restriction.
if ($element->localName === 'and') {
$className = 'qtism\\data\\expressions\\operators\\AndOperator';
} elseif ($element->localName === 'or') {
$className = 'qtism\\data\\expressions\\operators\\OrOperator';
} else {
$className = 'qtism\\data\\expressions\\operators\\' . ucfirst($element->localName);
}
$class = new ReflectionClass($className);
$params = array($children);
if ($element->localName === 'customOperator') {
// Retrieve XML content as a string.
$frag = $element->ownerDocument->createDocumentFragment();
$element = $element->cloneNode(true);
$frag->appendChild($element);
$params[] = $frag->ownerDocument->saveXML($frag);
$component = Reflection::newInstance($class, $params);
if (($class = self::getDOMElementAttributeAs($element, 'class')) !== null) {
$component->setClass($class);
}
if (($definition = self::getDOMElementAttributeAs($element, 'definition')) !== null) {
$component->setDefinition($definition);
}
return $component;
} else {
return Reflection::newInstance($class, $params);
}
}
/**
* Create a marshaller for a given QtiComponent or DOMElement object, depending on the current mapping
* of the MarshallerFactory. If no mapping entry can be found, the factory will perform a ultimate
* trial in the qtism\\data\\storage\\xml\\marshalling namespace to find the relevant Marshaller object.
*
* The newly created marshaller will be set up with the MarshallerFactory itself as its MarshallerFactory
* object (yes, we know, this is highly recursive but necessary x)).
*
* @param DOMElement|QtiComponent $object A QtiComponent or DOMElement object you want to get the corresponding Marshaller object.
* @param array $args An optional array of arguments to be passed to the Marshaller constructor.
* @throws InvalidArgumentException If $object is not a QtiComponent nor a DOMElement object.
* @throws RuntimeException If no Marshaller object can be created for the given $object.
* @return Marshaller The corresponding Marshaller object.
*/
public function createMarshaller($object, array $args = array())
{
if ($object instanceof QtiComponent) {
$qtiClassName = $object->getQtiClassName();
} else {
if ($object instanceof DOMElement) {
$qtiClassName = $object->localName;
}
}
if (isset($qtiClassName)) {
try {
// Look for a mapping entry.
if ($this->hasMappingEntry($qtiClassName)) {
$class = new ReflectionClass($this->getMappingEntry($qtiClassName));
} else {
// Look for default.
$className = 'qtism\\data\\storage\\xml\\marshalling\\' . ucfirst($qtiClassName) . 'Marshaller';
$class = new ReflectionClass($className);
}
} catch (ReflectionException $e) {
$msg = "No marshaller implementation could be found for component '{$qtiClassName}'.";
throw new RuntimeException($msg, 0, $e);
}
$marshaller = Reflection::newInstance($class, $args);
$marshaller->setMarshallerFactory($this);
return $marshaller;
} else {
$msg = "The object argument must be a QtiComponent or a DOMElementObject, '" . gettype($object) . "' given.";
throw new InvalidArgumentException($msg);
}
}
