ParametersTrait.php

<?php
 
namespace Omnipay\Common;
 
use Omnipay\Common\Exception\InvalidRequestException;
use Symfony\Component\HttpFoundation\ParameterBag;
 
trait ParametersTrait
{
    protected $parameters;
 
    protected function setParameter($key, $value)
    {
        $this->parameters->set($key, $value);
 
        return $this;
    }
 
    protected function getParameter($key)
    {
        return $this->parameters->get($key);
    }
 
    public function getParameters()
    {
        return $this->parameters->all();
    }
 
    public function initialize(array $parameters = [])
    {
        $this->parameters = new ParameterBag;
        Helper::initialize($this, $parameters);
        return $this;
    }
 
    public function validate(...$args)
    {
        foreach ($args as $key) {
            $value = $this->parameters->get($key);
            if (! isset($value)) {
                throw new InvalidRequestException("The $key parameter is required");
            }
        }
    }
}