- More work done on Update, Insert and Delete clause

- Added TOP property to select and delete to fit MSSQL limit's term.
- Added a new interface allowing object's manipulation on save() and load() queries

src/Entity/EntityObjectInterface.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Ulmus\Entity;
+
+interface EntityObjectInterface {
+    public function load(...$arguments);
+    public function save();
+}

src/Entity/Field/Date.php

@@ -2,13 +2,11 @@
 
 namespace Ulmus\Entity\Field;
 
-use DateTime;
-
-class Date extends DateTime {
+class Date extends Datetime {
     
     public function __toString()
     {
         return $this->format("Y-m-d");
     }
-    
+
 }

src/Entity/Field/Datetime.php

@@ -2,11 +2,30 @@
 
 namespace Ulmus\Entity\Field;
 
-class Datetime extends \DateTime {
+use Ulmus\Entity\EntityObjectInterface;
+
+class Datetime extends \DateTime implements EntityObjectInterface {
+        
+    public function load(...$arguments) 
+    {
+        $value = $arguments[0];
+        
+        # From Timestamp
+        if ( is_numeric($value) ) {
+            return new static("@$value");
+        }
+
+        return new static($value);
+    }
+    
+    public function save() 
+    {
+        return $this->getTimestamp();
+    }
     
     public function __toString()
     {
         return $this->format("Y-m-d H:i:s");
     }
     
-}
+}

src/Entity/Field/Time.php

@@ -2,9 +2,7 @@
 
 namespace Ulmus\Entity\Field;
 
-use DateTime;
-
-class Time extends DateTime {
+class Time extends Datetime {
     
     public function __toString()
     {

src/Entity/ObjectInstanciator.php

@@ -11,11 +11,23 @@ class ObjectInstanciator {
         if ( isset($this->objectCallbackDefinition[$type]) ) {
             return $this->objectCallbackDefinition[$type](...$arguments);
         }
+        elseif ( ($obj = new $type() ) instanceof EntityObjectInterface ) {
+            return $obj->load(...$arguments);
+        }
         else {
             return new $type(...$arguments);
         }
     }
     
+    public function convert(object $obj) 
+    {
+        if ( $obj instanceof EntityObjectInterface ) {
+            return $obj->save();
+        }
+        
+        return (string) $obj;
+    }
+    
     public function registerObject(string $type, Callable $callback) : void
     {
         $this->objectCallbackDefinition[$type] = $callback;