| public static filter ( array | ArrayAcces\ArrayAccess | Traversabl\Traversable $collection, Webmozart\Expression\Expression $expr ) : array | ArrayAcces\ArrayAccess | Traversabl\Traversable | ||
| $collection | array | ArrayAcces\ArrayAccess | Traversabl\Traversable | An array or an object implementing Traversable and ArrayAccess. |
| $expr | Webmozart\Expression\Expression | The expression to evaluate for each entry. |
| 리턴 | array | ArrayAcces\ArrayAccess | Traversabl\Traversable | The filtered collection. |
public static function filter($collection, Expression $expr)
{
if (is_array($collection)) {
return array_filter($collection, array($expr, 'evaluate'));
}
if (!($collection instanceof Traversable && $collection instanceof ArrayAccess)) {
throw new InvalidArgumentException(sprintf('Expected an array or an instance of Traversable and ArrayAccess. Got: %s', is_object($collection) ? get_class($collection) : gettype($collection)));
}
$clone = clone $collection;
foreach ($collection as $key => $value) {
if (!$expr->evaluate($value)) {
unset($clone[$key]);
}
}
return $clone;
} public function testDomainExpressions()
{
$c1 = new Customer();
$c1->setPremium(true);
$c2 = new Customer();
$c2->setBookings(array('booking1', 'booking2'));
$c3 = new Customer();
$c3->setPremium(true);
$c3->setBookings(array('booking1'));
$customers = array($c1, $c2, $c3);
$this->assertEquals(array($c1, 2 => $c3), Expr::filter($customers, new IsPremium()));
$this->assertEquals(array(1 => $c2, 2 => $c3), Expr::filter($customers, new HasPreviousBookings()));
$this->assertEquals(array(2 => $c3), Expr::filter($customers, Expr::andX(array(new HasPreviousBookings(), new IsPremium()))));
}
