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<?php
namespace Faker;
/**
* Proxy for other generators, to return only valid values. Works with
* Faker\Generator\Base->valid()
*/
class ValidGenerator
{
protected $generator;
protected $validator;
protected $maxRetries;
/**
* @param Generator $generator
* @param callable|null $validator
* @param integer $maxRetries
*/
public function __construct(Generator $generator, $validator = null, $maxRetries = 10000)
{
if (is_null($validator)) {
$validator = function () {
return true;
};
} elseif (!is_callable($validator)) {
throw new \InvalidArgumentException('valid() only accepts callables as first argument');
}
$this->generator = $generator;
$this->validator = $validator;
$this->maxRetries = $maxRetries;
}
/**
* Catch and proxy all generator calls but return only valid values
* @param string $attribute
*
* @return mixed
*/
public function __get($attribute)
{
return $this->__call($attribute, array());
}
/**
* Catch and proxy all generator calls with arguments but return only valid values
* @param string $name
* @param array $arguments
*
* @return mixed
*/
public function __call($name, $arguments)
{
$i = 0;
do {
$res = call_user_func_array(array($this->generator, $name), $arguments);
$i++;
if ($i > $this->maxRetries) {
throw new \OverflowException(sprintf('Maximum retries of %d reached without finding a valid value', $this->maxRetries));
}
} while (!call_user_func($this->validator, $res));
return $res;
}
}