/**
* Resolve GodObjects
*
* 8 public methods or more (excluding getters and setters)
* lack of cohesion of methods
* instanciate 6 or more different classes
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new GodObject($class->getFullname());
// we don't look private methods
$collection = (new Collection($class->getMethods()))->where('method => method.getVisibility() == "public"');
// at least 8 public methods
if (sizeof($collection) < 8) {
return;
}
// lack of cohesion of methods
$lcom = new LackOfCohesionOfMethods();
$result = $lcom->calculate($class);
if ($result->getLcom() < 3) {
return;
}
// know everything (instanciate more than 8 different classes)
$nb = 0;
foreach ($collection as $method) {
$instancied = array_diff($method->getInstanciedClasses(), array($class->getFullname()));
$nb += sizeof($instancied);
}
if ($nb < 6) {
return;
}
$resolved->pushPattern($pattern);
}
/**
* Resolve AbstractFactory
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new AbstractFactory($class->getFullname());
$resolver = new TypeResolver();
// we don't look private and non static methods
$collection = (new Collection($class->getMethods()))->where(sprintf('method => method.getVisibility() == "public" and method.getState() == %s', ReflectedMethod::STATE_STATIC));
if (empty($collection)) {
return;
}
/** @var ReflectedMethod $method */
foreach ($collection as $method) {
// method instanciates at least one object
$instanciated = array_unique($method->getInstanciedClasses());
if (empty($instanciated)) {
continue;
}
foreach ($method->getReturns() as $return) {
// returns an object
if ($resolver->isNative($return->getType())) {
continue;
}
// doesn't return itself (avoid singleton)
if (in_array($return->getType(), array('\\self', '\\static', $class->getFullname()))) {
continue;
}
$pattern->setCreated($return->getType());
$resolved->pushPattern($pattern);
return;
}
}
}
/**
* Resolve Decorators
*
* extends one class,
* has one public method
* receive one argument and call this argument
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new Decorator($class->getFullname());
// extends one class
if (!$class->getParent()) {
return;
}
// exclude magical methods
$collection = (new Collection($class->getMethods()))->where('method => !isMagicMethod(method)');
// class should have only one public method
$collection->where('method => method.getVisibility() == "public"');
if (sizeof($collection) != 1) {
return;
}
// receive one argument
$collection->where('count(method.getArguments()) == 1');
if (sizeof($collection) != 1) {
return;
}
// call received argument
$method = $collection->first();
foreach ($method->getArguments() as $argument) {
if (in_array($argument->getName(), $method->getExternalCalls())) {
$pattern->setDecorated($argument->getType());
$resolved->pushPattern($pattern);
return;
}
}
}
/**
* Resolve facades
*
* Call lot of non instancied external classes
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new Facade($class->getFullname());
foreach ($class->getMethods() as $method) {
$instancied = array_unique($method->getInstanciedClasses());
// $externalCalls = $method->getExternalCalls();
// today PhpMetrics is not able to get external calls when they are made on internal propery
// ex: $this->foo->bar()
// we will count T_OBJECT_CALL
if (preg_match_all('!\\->\\w+\\(!', $method->getTokens()->asString(), $matches)) {
$nbExternalCalls = sizeof($matches[0]);
}
if (sizeof($instancied) == 0 && $nbExternalCalls >= 2) {
$resolved->pushPattern($pattern);
return;
}
}
}
/**
* Resolve Structures
*
* extends nothing
* has only getter and setters
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new Structure($class->getFullname());
// extends one class
if ($class->getParent()) {
return;
}
// we don't look private methods
$collection1 = (new Collection($class->getMethods()))->where('method => method.getVisibility() == "public"');
// at least 2 public methods
if (sizeof($collection1) < 2) {
return;
}
// list getters and setters
$collection2 = (new Collection($class->getMethods()))->where('method => (method.isGetter() or method.isSetter()) and method.getVisibility() == "public"');
if (sizeof($collection1) === sizeof($collection2)) {
$resolved->pushPattern($pattern);
}
}
/**
* Resolve bridges
*
* Bridge is identified by its Abstraction class, which
* manages a number of Implementors and has some realization as RefinedAbstraction. Each
* Implementor has some realization.
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new Bridge($class->getFullname());
// uses more than 2 classes ?
$deps = $class->getDependencies();
if (sizeof($deps) < 1) {
return;
}
// preparing data
// only for algorithm
$map = [];
foreach ($deps as $index => $dep) {
$dep = $this->searchClassNamed($dep, $this->classes);
if (!$dep || $dep->getFullname() === $class->getFullname()) {
continue;
}
$map[$dep->getFullname()] = $dep;
}
// uses a class (abstraction) that itslef uses another that main class uses (implementation) ?
foreach ($map as $dep) {
// get dependencies of this dependency
$relatedDeps = $dep->getDependencies();
foreach ($relatedDeps as $relatedDep) {
$relatedDep = $this->searchClassNamed($relatedDep, $this->classes);
if (!$relatedDep || $relatedDep->getFullname() === $class->getFullname()) {
continue;
}
// does this related dependencies is also used by main dependency ?
if (isset($map[$relatedDep->getFullname()]) && $dep->getFullname() !== $relatedDep->getFullname()) {
$pattern->setAbstractness($dep->getFullname());
$pattern->setImplemenation($relatedDep->getFullname());
$resolved->pushPattern($pattern);
return;
}
}
}
}
/**
* Resolve Singleton
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new Singleton($class->getFullname());
$methods = $class->getMethods();
// private construct ?
if (isset($methods['__construct']) && $methods['__construct']->getVisibility() !== ReflectedMethod::VISIBILITY_PUBLIC) {
// static method ?
foreach ($methods as $method) {
if ($method->getState() === ReflectedMethod::STATE_STATIC) {
// call itself ?
$deps = $method->getReturns();
foreach ($deps as $dep) {
if (in_array($dep->getType(), array('\\self', '\\static', $class->getFullname()))) {
// yes, class is a singleton
$resolved->pushPattern($pattern);
return;
}
}
}
}
}
}
/**
* Resolve proxies
*
* A class implements an interface or extends
* an (abstract) class, and owns a
* reference to a class that implements the
* same interface or extends the same (abstract)
* class.
*
* @param ResolvedClass $resolved
*/
public function resolve(ResolvedClass $resolved)
{
$class = $resolved->getClass();
$pattern = new Proxy($class->getFullname());
if ($class->getParent() || $class->getInterfaces()) {
$deps = $class->getDependencies();
foreach ($deps as $dep) {
// does call any class ?
$dep = $this->searchClassNamed($dep, $this->classes);
if (!$dep || $dep->getFullname() === $class->getFullname()) {
continue;
}
// same parent ?
$sameKind = null !== $dep->getParent() && $dep->getParent() === $class->getParent();
// same interface ?
$sameKind = $sameKind || sizeof(array_intersect($class->getInterfaces(), $dep->getInterfaces())) > 0;
if ($sameKind) {
$pattern->setProxified($dep->getFullname());
$resolved->pushPattern($pattern);
return;
}
}
}
}
