diff --git a/library/Hydrator/Strategy/HasOneStrategy.php b/library/Hydrator/Strategy/HasOneStrategy.php
index 613f9ed..63a293f 100644
--- a/library/Hydrator/Strategy/HasOneStrategy.php
+++ b/library/Hydrator/Strategy/HasOneStrategy.php
@@ -62,19 +62,17 @@ public function extract($value)
             return $this->nullable ? null : [];
         }
 
+        if (is_object($value)) {
+            $objectPrototype = $this->getObjectPrototype();
+            return $objectPrototype->getHydrator()->extract($value);
+        }
+                
         if (is_array($value)) {
             return $value;
         }
 
-        $objectPrototype = $this->getObjectPrototype();
-
-        if ($value instanceof $objectPrototype) {
-            return $objectPrototype->getHydrator()->extract($value);
-        }
-
         throw new Exception\InvalidArgumentException(sprintf(
-            'Invalid value: must be null (only if nullable option is enabled), or an array, or an instance of "%s": "%s" given',
-            get_class($objectPrototype),
+            'Invalid value: must be null, or an array, or an object: "%s" given',
             is_object($value) ? get_class($value) : gettype($value)
         ));
     }
diff --git a/library/Object/AbstractCollection.php b/library/Object/AbstractCollection.php
index 5aa58eb..da2ee98 100644
--- a/library/Object/AbstractCollection.php
+++ b/library/Object/AbstractCollection.php
@@ -103,26 +103,18 @@ public function append($value)
      * @return array
      * @throws Exception\InvalidArgumentException
      */
+    /**
+     * {@inheritdoc}
+     */
     public function exchangeArray($data)
     {
-        if (!is_array($data) && !is_object($data)) {
-            throw new Exception\InvalidArgumentException(
-                'Passed variable is not an array or object, using empty array instead'
-            );
-        }
-
-        if (is_object($data) && ($data instanceof parent || $data instanceof \ArrayObject)) {
-            $data = $data->getArrayCopy();
+        $oldData = parent::exchangeArray($data);
+        try {
+            $this->validateData($this->storage);
+        } catch (\Exception $e) {
+            $this->storage = $oldData;
+            throw $e;
         }
-
-        if (!is_array($data)) {
-            $data = (array) $data;
-        }
-
-        $this->validateData($data);
-
-        $storage = $this->storage;
-        $this->storage = $data;
-        return $storage;
+        return $oldData;
     }
 }
diff --git a/tests/Object/AbstractCollectionTest.php b/tests/Object/AbstractCollectionTest.php
index f2eae18..2428c63 100644
--- a/tests/Object/AbstractCollectionTest.php
+++ b/tests/Object/AbstractCollectionTest.php
@@ -97,8 +97,15 @@ public function testExchangeArrayArrayIterator()
     }
     public function testExchangeArrayStringArgumentFail()
     {
+        $data = ['foo' => 'bar'];
         $this->setExpectedException('InvalidArgumentException');
-        $ar = $this->getMockForAbstractClass(AbstractCollection::class, [['foo' => 'bar']]);
-        $old    = $ar->exchangeArray('Bacon');
+        $ar = $this->getMockForAbstractClass(AbstractCollection::class, [$data]);
+        try {
+            $old    = $ar->exchangeArray('Bacon');
+        } catch (\Exception $e) {
+            // Test data did not change
+            $this->assertEquals($data, $ar->getArrayCopy());
+            throw $e;
+        }
     }
 }