- BC Break: _PHP_ namespaces changed (PSR-4 standard). The _root_ namespace for all _PF_ related scripts is Exodus4D\Pathfinder

- BC Break: Project folder structure changed. Removed `app/main` dir.
- BC Break: Core _PHP_ framework + dependencies moved into `composer.json` and are no longer part of this repo

app/Exception/ValidationException.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: exodus4d
+ * Date: 21.02.15
+ * Time: 00:12
+ */
+
+namespace Exodus4D\Pathfinder\Exception;
+
+
+class ValidationException extends PathfinderException {
+
+    /**
+     * @var array
+     */
+    protected $codes = [
+        2000 => 422
+    ];
+
+    /**
+     * table column that triggers the exception
+     * @var string
+     */
+    private $field;
+
+    /**
+     * ValidationException constructor.
+     * @param string $message
+     * @param string $field
+     */
+    public function __construct(string $message, string $field = ''){
+        parent::__construct($message, 2000);
+        $this->field = $field;
+    }
+
+    /**
+     * get error object
+     * @return \stdClass
+     */
+    public function getError() : \stdClass {
+        $error = parent::getError();
+        $error->field = $this->field;
+        return $error;
+    }
+}