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<?php
/*
* This file is part of the CGI-Calc package.
*
* (c) Milos Tomic <[email protected]>
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Cgi\Calc\Field;
use Cgi\Calc\FieldProducer;
use Cgi\Calc\Point;
abstract class AbstractFieldProducer implements FieldProducer
{
private $callback;
public function __construct($valueProvider)
$this->callback = $this->getValueCallable($valueProvider);
}
/**
* @param Point $point
* @return mixed|null
protected function getValue(Point $point)
return $this->callback ? call_user_func($this->callback, $point) : null;
* @param ValueProvider|callable|null $valueProvider
* @return callable|null
private function getValueCallable($valueProvider)
$callback = null;
if ($valueProvider instanceof ValueProvider) {
$callback = function (Point $p) use ($valueProvider) {
return $valueProvider->get($p);
};
} elseif (is_callable($valueProvider)) {
$callback = $valueProvider;
} elseif ($valueProvider) {
throw new \InvalidArgumentException('Value provider must be instance of ValueProvider or callable');
return $callback;
tmilos /
cgi-calc
