Abstract Autocomplete Form View Helper ZF2 issue #4221

AbstractFormAutocomplete.php

<?php
namespace Application\Form\View\Helper;

use Zend\Form\View\Helper\FormText;
use Zend\Form\ElementInterface as ElementInterface;

class AbstractFormAutocomplete extends FormText
{
    protected $foo;

    public function render(ElementInterface $element)
    {
        $this->getFoo($element);
        return parent::render($element);
    }

    /**
     * @return the $select
     */
    public function getFoo(ElementInterface $element) {
        if (!$this->foo) {
            $foo = 'foo';
            $this->setFoo($foo);
        }
        return $this->foo;
    }

    public function setFoo($foo) {
        echo "foo set to $foo";
        $this->foo = $foo;
    }
}

AutocompleteForm.php

     $this->add(array(
        'name' => 'setfoo',
        'type' => 'autocompletehidden',
        'options' => array(
            'label' => 'I will set Foo'
        ));

     $this->add(array(
        'name' => 'foostillset',
        'type' => 'autocompletehidden',
        'options' => array(
            'label' => 'Foo is already set'
        ));

Module.php

public function getViewHelperConfig()
{
    return array(
        'invokables' => array(
            'formelement'            => 'Application\Form\View\Helper\FormElement',
            'formautocompletehidden' => 'Application\Form\View\Helper\FormAutocompleteHidden'
        ),
        'shared' => array(
            'formelement'            => false,
            'formautocompletehidden' => false
        ),
    );
}

public function getFormElementConfig()
{
    return array(
        'invokables' => array(
            'autocompletehidden' => 'Application\Form\Element\AutocompleteHidden',
        ),
    );
}

Please see ZF2 issue #4221 zendframework/zendframework#4221 .