Merge pull request #36 from rekalogika:feat/fromobjectcache

feat(`PresetMappingFactory`): Add `fromObjectCache()` and `fromObjectCacheReversed()`.

Author: priyadi

CHANGELOG.md

@@ -21,6 +21,7 @@
 * feat: Mapping to existing values in a dynamic property.
 * perf(`ObjectToObjectTransformer`): Prevent delegating to `MainTransformer` if
   the current value in a dynamic property is a scalar.
+* feat(`PresetMappingFactory`): Add `fromObjectCache()` and `fromObjectCacheReversed()`.
 
 ## 1.0.0
 

src/Transformer/Context/PresetMappingFactory.php

@@ -30,6 +30,32 @@ public static function fromObjectCache(ObjectCache $objectCache): PresetMapping
         /** @var SplObjectStorageWrapper<object,\ArrayObject<class-string,object>> */
         $presetMapping = new SplObjectStorageWrapper(new \SplObjectStorage());
 
+        /**
+         * @var object $source
+         * @var \ArrayObject<class-string,object> $classToTargetMapping
+         */
+        foreach ($objectCacheWeakMap as $source => $classToTargetMapping) {
+            foreach ($classToTargetMapping as $targetClass => $target) {
+                if (!$presetMapping->offsetExists($source)) {
+                    /** @var \ArrayObject<class-string,object> */
+                    $arrayObject = new \ArrayObject();
+                    $presetMapping->offsetSet($source, $arrayObject);
+                }
+
+                $presetMapping->offsetGet($source)?->offsetSet($targetClass, $target);
+            }
+        }
+
+        return new PresetMapping($presetMapping);
+    }
+
+    public static function fromObjectCacheReversed(ObjectCache $objectCache): PresetMapping
+    {
+        $objectCacheWeakMap = $objectCache->getInternalMapping();
+
+        /** @var SplObjectStorageWrapper<object,\ArrayObject<class-string,object>> */
+        $presetMapping = new SplObjectStorageWrapper(new \SplObjectStorage());
+
         /**
          * @var object $source
          * @var \ArrayObject<class-string,object> $classToTargetMapping

tests/Fixtures/RememberingMapper/RememberingMapper.php

@@ -57,7 +57,7 @@ public function map(object $source, object|string $target, ?Context $context = n
             throw new UnexpectedValueException(sprintf('Expected instance of "%s", got "%s"', $target, get_class($result)));
         }
 
-        $newPresetMapping = PresetMappingFactory::fromObjectCache($objectCache);
+        $newPresetMapping = PresetMappingFactory::fromObjectCacheReversed($objectCache);
         $this->presetMapping->mergeFrom($newPresetMapping);
 
         return $result;

tests/IntegrationTest/PresetMappingTest.php

@@ -36,13 +36,30 @@ public function testFromObjectCache(): void
         $objectCache = $this->createObjectCache();
 
         $source = new ObjectWithScalarProperties();
-        $targetType = TypeFactory::objectOfClass(ObjectWithScalarProperties::class);
+        $targetType = TypeFactory::objectOfClass(ObjectWithScalarPropertiesDto::class);
         $target = new ObjectWithScalarPropertiesDto();
 
         $objectCache->saveTarget($source, $targetType, $target);
 
         $presetMapping = PresetMappingFactory::fromObjectCache($objectCache);
 
+        $result = $presetMapping->findResult($source, ObjectWithScalarPropertiesDto::class);
+
+        $this->assertSame($target, $result);
+    }
+
+    public function testFromObjectCacheReversed(): void
+    {
+        $objectCache = $this->createObjectCache();
+
+        $source = new ObjectWithScalarProperties();
+        $targetType = TypeFactory::objectOfClass(ObjectWithScalarProperties::class);
+        $target = new ObjectWithScalarPropertiesDto();
+
+        $objectCache->saveTarget($source, $targetType, $target);
+
+        $presetMapping = PresetMappingFactory::fromObjectCacheReversed($objectCache);
+
         $result = $presetMapping->findResult($target, $source::class);
 
         $this->assertSame($source, $result);
@@ -58,15 +75,15 @@ public function testMerge(): void
 
         $objectCache->saveTarget($source, $targetType, $target);
 
-        $presetMapping = PresetMappingFactory::fromObjectCache($objectCache);
+        $presetMapping = PresetMappingFactory::fromObjectCacheReversed($objectCache);
 
         $source2 = new ObjectWithScalarProperties();
         $targetType2 = TypeFactory::objectOfClass(ObjectWithScalarProperties::class);
         $target2 = new ObjectWithScalarPropertiesDto();
 
         $objectCache->saveTarget($source2, $targetType2, $target2);
 
-        $presetMapping2 = PresetMappingFactory::fromObjectCache($objectCache);
+        $presetMapping2 = PresetMappingFactory::fromObjectCacheReversed($objectCache);
 
         $presetMapping->mergeFrom($presetMapping2);