Merge pull request #41 from Toilal/constructor-destination-context

Set destination class context to support custom constructor implementation

README.md

@@ -837,6 +837,9 @@ object by default. It is accessible using `$context['AutoMapper::DESTINATION_CON
 This is useful in scenarios where you need data from the destination object
 to populate the object you're mapping.
 
+When implementing a custom constructor, the context will contain the destination
+class by default. It is accessible using `$context['AutoMapper::DESTINATION_CLASS_CONTEXT']`.
+
 ### Misc
 
 - Passing `NULL` as an argument for the source object to `map` returns `NULL`.

src/AutoMapper.php

@@ -20,6 +20,8 @@
 class AutoMapper implements AutoMapperInterface
 {
     public const DESTINATION_CONTEXT = '__destination';
+
+    public const DESTINATION_CLASS_CONTEXT = '__destination_class';
 
     /**
      * @var AutoMapperConfigInterface
@@ -72,7 +74,9 @@ public function map($source, string $destinationClass, array $context = [])
         }
 
         if ($mapping->hasCustomConstructor()) {
-            $destinationObject = $mapping->getCustomConstructor()($source, $this, $context);
+            $destinationObject = $mapping->getCustomConstructor()($source, $this, array_merge([
+                self::DESTINATION_CLASS_CONTEXT => $destinationClass
+            ]));
         }
         elseif (interface_exists($destinationClass)) {
             // If we're mapping to an interface a valid custom constructor has