function compose(SiteUrl $url, array $parameters)
{
if ($this->requestPart->is(WebRequestPart::GET)) {
if (array_key_exists($this->name, $parameters)) {
$url->addQueryArgument($this->name, (string) $parameters[$this->name]);
} else {
if (!$this->isOptional) {
if ($this->defaultValue) {
$url->addQueryArgument($this->name, $this->defaultValue);
} else {
// FIXME: use exception
Assert::isUnreachable('missing %s parameter', $this->name);
}
}
}
}
}
