Revert changes to embeddable mapping in 2.7 (#8138)

* Revert "Fix inherited embeddables and nesting after AnnotationDriver change #8006 (#8036)"

This reverts commit a9b6b72.

* Revert "Make Embeddable not transient"

This reverts commit 58677c2.

* Housekeeping: CS fixes

docs/en/tutorials/embeddables.rst

@@ -8,9 +8,7 @@ or address are the primary use case for this feature.
 
 .. note::
 
-    Embeddables can not contain references to entities. They can however compose
-    other embeddables in addition to holding properties with basic ``@Column``
-    mapping.
+    Embeddables can only contain properties with basic ``@Column`` mapping.
 
 For the purposes of this tutorial, we will assume that you have a ``User``
 class in your application and you would like to store an address in

lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php

@@ -404,7 +404,7 @@ private function getShortName($className)
     private function addInheritedFields(ClassMetadata $subClass, ClassMetadata $parentClass)
     {
         foreach ($parentClass->fieldMappings as $mapping) {
-            if (! isset($mapping['inherited']) && ! $parentClass->isMappedSuperclass && ! $parentClass->isEmbeddedClass) {
+            if (! isset($mapping['inherited']) && ! $parentClass->isMappedSuperclass) {
                 $mapping['inherited'] = $parentClass->name;
             }
             if (! isset($mapping['declared'])) {
@@ -472,6 +472,10 @@ private function addInheritedEmbeddedClasses(ClassMetadata $subClass, ClassMetad
     private function addNestedEmbeddedClasses(ClassMetadata $subClass, ClassMetadata $parentClass, $prefix)
     {
         foreach ($subClass->embeddedClasses as $property => $embeddableClass) {
+            if (isset($embeddableClass['inherited'])) {
+                continue;
+            }
+
             $embeddableMetadata = $this->getMetadataFor($embeddableClass['class']);
 
             $parentClass->mapEmbedded(
@@ -779,9 +783,7 @@ protected function getDriver()
      */
     protected function isEntity(ClassMetadataInterface $class)
     {
-        assert($class instanceof ClassMetadata);
-
-        return $class->isMappedSuperclass === false && $class->isEmbeddedClass === false;
+        return isset($class->isMappedSuperclass) && $class->isMappedSuperclass === false;
     }
 
     /**

lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php

@@ -45,7 +45,6 @@ class AnnotationDriver extends AbstractAnnotationDriver
     protected $entityAnnotationClasses = [
         Mapping\Entity::class => 1,
         Mapping\MappedSuperclass::class => 2,
-        Mapping\Embeddable::class => 3,
     ];
 
     /**
@@ -278,8 +277,6 @@ public function loadMetadataForClass($className, ClassMetadata $metadata)
         /* @var $property \ReflectionProperty */
         foreach ($class->getProperties() as $property) {
             if ($metadata->isMappedSuperclass && ! $property->isPrivate()
-                ||
-                $metadata->isEmbeddedClass && $property->getDeclaringClass()->getName() !== $class->getName()
                 ||
                 $metadata->isInheritedField($property->name)
                 ||

tests/Doctrine/Tests/ORM/Functional/ValueObjectsTest.php

@@ -328,11 +328,6 @@ public function getInfiniteEmbeddableNestingData()
             ['DDCNestingEmbeddable1', 'DDCNestingEmbeddable4'],
         ];
     }
-
-    public function testEmbeddableIsNotTransient()
-    {
-        $this->assertFalse($this->_em->getMetadataFactory()->isTransient(DDC93Address::class));
-    }
 }