NMRelation cleanup / improvement

Core/Objects/DatabaseEntity/Controller/NMRelationReference.class.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Core\Objects\DatabaseEntity\Controller;
+
+use Core\Driver\SQL\SQL;
+
+class NMRelationReference implements Persistable {
+
+  private DatabaseEntityHandler $handler;
+  private string $thisProperty;
+  private string $refProperty;
+
+  public function __construct(DatabaseEntityHandler $handler, string $thisProperty, string $refProperty) {
+    $this->handler = $handler;
+    $this->thisProperty = $thisProperty;
+    $this->refProperty = $refProperty;
+  }
+
+  public function dependsOn(): array {
+    return [$this->handler->getTableName()];
+  }
+
+  public function getTableName(): string {
+    return $this->handler->getTableName();
+  }
+
+  public function getCreateQueries(SQL $sql): array {
+    return [];  // nothing to do here, will be managed by other handler
+  }
+
+  public function getThisProperty(): string {
+    return $this->thisProperty;
+  }
+
+  public function getRefProperty(): string {
+    return $this->refProperty;
+  }
+
+  public function getRelHandler(): DatabaseEntityHandler {
+    return $this->handler;
+  }
+}