/**
* Short lambda expression
* ex:
* ['x,y'=>'x+y+z', 'z'=>$z]
* it means
* function ($x,$y) use ($z) {return $x+$y+$z;}
* @see http://symfony.com/doc/current/components/expression_language/syntax.html
* @param callable|array $lambda
* @return callable
*/
public static function fun($lambda)
{
if (is_callable($lambda)) {
return $lambda;
}
return Lambda::fun($lambda);
}
/**
* @param callable|string|array|Predicate $src
* @throws \InvalidArgumentException
* @return Predicate
*/
public static function resolve($src)
{
if (is_callable($src)) {
return new DelegatePredicate($src);
}
if (is_string($src)) {
return new PropertyPredicate($src);
}
if (is_array($src)) {
return new DelegatePredicate(Lambda::fun($src));
}
if ($src instanceof Predicate) {
return $src;
}
$type = gettype($src);
throw new \InvalidArgumentException("Invalid predicate, got {$type}");
}
/**
* @param \Closure|Comparer $src
* @param Comparer $default
* @throws \InvalidArgumentException
* @return \Ginq\Core\Comparer
*/
public static function resolve($src, $default)
{
if (is_null($src)) {
return $default;
}
if (is_callable($src)) {
return new DelegateComparer($src);
}
if (is_array($src)) {
return new DelegateComparer(Lambda::fun($src));
}
if ($src instanceof Comparer) {
return $src;
}
$type = gettype($src);
throw new \InvalidArgumentException("'comparer' Closure expected, got {$type}");
}
/**
* @param \Closure|JoinSelector|int $src
* @param $default
* @throws \InvalidArgumentException
* @return JoinSelector
*/
public static function resolve($src, $default)
{
if (is_null($src)) {
return $default;
}
if (is_callable($src)) {
return new DelegateJoinSelector($src);
}
if (is_array($src)) {
return new DelegateJoinSelector(Lambda::fun($src));
}
if ($src instanceof JoinSelector) {
return $src;
}
$type = gettype($src);
throw new \InvalidArgumentException("Invalid selector, got {$type}");
}