/**
* Creates a named nested element.
*
* Valid creators can be in the form createFoo() or addFoo(Bar).
*
* @param Project $project
* @param object $element Object the XML tag is child of.
* Often a task object.
* @param string $elementName XML tag name
* @return object Returns the nested element.
* @throws BuildException
*/
public function createElement(Project $project, $element, $elementName)
{
$addMethod = "add" . strtolower($elementName);
$createMethod = "create" . strtolower($elementName);
$nestedElement = null;
if (isset($this->nestedCreators[$createMethod])) {
$method = $this->nestedCreators[$createMethod];
try {
// try to invoke the creator method on object
$project->log(" -calling creator " . $method->getDeclaringClass()->getName() . "::" . $method->getName() . "()", Project::MSG_DEBUG);
$nestedElement = $method->invoke($element);
} catch (Exception $exc) {
throw new BuildException($exc);
}
} elseif (isset($this->nestedCreators[$addMethod])) {
$method = $this->nestedCreators[$addMethod];
// project components must use class hints to support the add methods
try {
// try to invoke the adder method on object
$project->log(" -calling adder " . $method->getDeclaringClass()->getName() . "::" . $method->getName() . "()", Project::MSG_DEBUG);
// we've already assured that correct num of params
// exist and that method is using class hints
$params = $method->getParameters();
$classname = null;
if (($hint = $params[0]->getClass()) !== null) {
$classname = $hint->getName();
}
// create a new instance of the object and add it via $addMethod
$clazz = new ReflectionClass($classname);
if ($clazz->getConstructor() !== null && $clazz->getConstructor()->getNumberOfRequiredParameters() === 1) {
$nestedElement = new $classname(Phing::getCurrentProject());
} else {
$nestedElement = new $classname();
}
$method->invoke($element, $nestedElement);
} catch (Exception $exc) {
throw new BuildException($exc);
}
} elseif ($this->bean->implementsInterface("CustomChildCreator")) {
$method = $this->bean->getMethod('customChildCreator');
try {
$nestedElement = $method->invoke($element, strtolower($elementName), $project);
} catch (Exception $exc) {
throw new BuildException($exc);
}
} else {
//try the add method for the element's parent class
$typedefs = $project->getDataTypeDefinitions();
if (isset($typedefs[$elementName])) {
$elementClass = Phing::import($typedefs[$elementName]);
$parentClass = get_parent_class($elementClass);
$addMethod = 'add' . strtolower($parentClass);
if (isset($this->nestedCreators[$addMethod])) {
$method = $this->nestedCreators[$addMethod];
try {
$project->log(" -calling parent adder " . $method->getDeclaringClass()->getName() . "::" . $method->getName() . "()", Project::MSG_DEBUG);
$nestedElement = new $elementClass();
$method->invoke($element, $nestedElement);
} catch (Exception $exc) {
throw new BuildException($exc);
}
}
}
if ($nestedElement === null) {
$msg = $this->getElementName($project, $element) . " doesn't support the '{$elementName}' creator/adder.";
throw new BuildException($msg);
}
}
if ($nestedElement instanceof ProjectComponent) {
$nestedElement->setProject($project);
}
return $nestedElement;
}
