ArrayLike.php

<?php

class ArrayLike implements JmesPathableArrayInterface
{
    private $data = [];

    private $position = 0;

    public function __construct(array $data = [])
    {
        $this->data = $data;
    }

    public function offsetExists($offset)
    {
        return array_key_exists($offset, $this->data);
    }

    public function offsetGet($offset)
    {
        return $this->offsetExists($offset) ? $this->data[$offset] : null;
    }

    public function offsetSet($offset, $value)
    {
        if (is_null($offset)) {
            $this->data[] = $value;
        } else {
            $this->data[$offset] = $value;
        }
    }

    public function offsetUnset($offset)
    {
        unset($this->data[$offset]);
    }

    public function count()
    {
        return count($this->data);
    }

    public function current()
    {
        return $this->offsetGet($this->position);
    }

    public function key()
    {
        return $this->position;
    }

    public function next()
    {
        $this->position++;
    }

    public function rewind()
    {
        $this->position = 0;
    }

    public function valid()
    {
        return $this->offsetExists($this->position);
    }
}