/**
* Creates an instance of the class and injects dependencies..
*
* @param ClassDefinition $classDefinition
* @param array $parameters Optional parameters to use to create the instance.
*
* @throws DefinitionException
* @throws DependencyException
* @return object
*
* @todo Make private once PHP-DI supports PHP > 5.4 only
*/
public function createInstance(ClassDefinition $classDefinition, array $parameters)
{
if (!class_exists($classDefinition->getClassName()) && !interface_exists($classDefinition->getClassName())) {
throw DefinitionException::create($classDefinition, sprintf("the class %s doesn't exist", $classDefinition->getClassName()));
}
$classReflection = new ReflectionClass($classDefinition->getClassName());
if (!$classReflection->isInstantiable()) {
throw DefinitionException::create($classDefinition, sprintf("%s is not instantiable", $classDefinition->getClassName()));
}
$constructorInjection = $classDefinition->getConstructorInjection();
try {
$instance = $this->injectConstructor($classDefinition, $classReflection, $constructorInjection, $parameters);
$this->injectMethodsAndProperties($classDefinition, $instance, $classDefinition);
} catch (NotFoundException $e) {
throw new DependencyException(sprintf("Error while injecting dependencies into %s: %s", $classReflection->getName(), $e->getMessage()), 0, $e);
}
return $instance;
}
/**
* Fixes parameters indexed by the parameter name -> reindex by position.
*
* This is necessary so that merging definitions between sources is possible.
*
* @param ClassDefinition $definition
* @param string $method
* @param array $parameters
* @return array
*/
private function fixParameters(ClassDefinition $definition, $method, $parameters)
{
$fixedParameters = array();
foreach ($parameters as $index => $parameter) {
// Parameter indexed by the parameter name, we reindex it with its position
if (is_string($index)) {
$callable = array($definition->getClassName(), $method);
$reflectionParameter = new \ReflectionParameter($callable, $index);
$index = $reflectionParameter->getPosition();
}
$fixedParameters[$index] = $parameter;
}
return $fixedParameters;
}
private function assertClassExists(ClassDefinition $classDefinition)
{
if (!class_exists($classDefinition->getClassName()) && !interface_exists($classDefinition->getClassName())) {
throw DefinitionException::create($classDefinition, sprintf("Entry %s cannot be resolved: class %s doesn't exist", $classDefinition->getName(), $classDefinition->getClassName()));
}
}
