Merge pull request #4 from s3b4stian/s3b4stian-patch-1

TypedObjectArray added

Author: s3b4stian

src/TypedObjectArray.php

@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * Linna Array.
+ *
+ * @author Sebastian Rapetti <[email protected]>
+ * @copyright (c) 2017, Sebastian Rapetti
+ * @license http://opensource.org/licenses/MIT MIT License
+ */
+declare(strict_types=1);
+
+namespace Linna;
+
+use ArrayObject;
+use InvalidArgumentException;
+
+/**
+ * Create an array of typed elements.
+ */
+class TypedObjectArray extends ArrayObject
+{
+    /**
+     * @var string Current type for array
+     */
+    protected $type = '';
+
+    /**
+     * Contructor.
+     *
+     * @param string $type
+     * @param array  $array
+     *
+     * @throws InvalidArgumentException If elements of passed with $array
+     *                                  are not of the configured type
+     */
+    public function __construct(string $type, array $array = [])
+    {
+        //check elements of passed array
+        //I will find another method
+        foreach ($array as $element) {
+            if ($element instanceof $type) {
+                continue;
+            }
+            throw new InvalidArgumentException('Elements passed to '.__CLASS__.' must be of the type '.$type);
+        }
+
+        //call parent constructor
+        parent::__construct($array, 0, 'ArrayIterator');
+        //store array type
+        $this->type = $type;
+    }
+
+    /**
+     * Array style value assignment.
+     *
+     * @param mixed $index
+     * @param mixed $newval
+     *
+     * @throws InvalidArgumentException If value passed with $newval are not of the configured type
+     *
+     * @return void
+     */
+    public function offsetSet($index, $newval)
+    {
+        if ($newval instanceof $this->type) {
+            parent::offsetSet($index, $newval);
+
+            return;
+        }
+        throw new InvalidArgumentException('Elements passed to '.__CLASS__.' must be of the type '.$this->type);
+    }
+}