UseRandomGenerator.hint

<?
import javax.lang.model.element.ElementKind;
?>

<!description="Introduce java.util.random.* API.">

// declarations
$modifiers$ java.util.Random $rng; :: sourceVersionGE(17) =>
$modifiers$ java.util.random.RandomGenerator $rng;
;;

$modifiers$ java.util.Random $rng = $initializer; :: sourceVersionGE(17) =>
$modifiers$ java.util.random.RandomGenerator $rng = $initializer;
;;

// assignments
// should be '$rng super java.util.random.RandomGenerator'
$rng = new java.util.Random($seed$) :: !$rng instanceof java.util.Random && sourceVersionGE(17)
=> $rng = java.util.random.RandomGeneratorFactory.of("Random").create($seed$)
=> $rng = java.util.random.RandomGeneratorFactory.getDefault().create($seed$)
=> $rng = RandomGenerator.getDefault()
;;

// this is redundant but required because the above hack does not catch
// RandomGenerator old2 = new Random() for some reason
java.util.random.RandomGenerator $rng = new java.util.Random($seed$) && sourceVersionGE(17)
=> java.util.random.RandomGenerator $rng = java.util.random.RandomGeneratorFactory.of("Random").create($seed$)
=> java.util.random.RandomGenerator $rng = java.util.random.RandomGeneratorFactory.getDefault().create($seed$)
=> java.util.random.RandomGenerator $rng = RandomGenerator.getDefault()
;;


// passed as value to methods or constructors
new java.util.Random($seed$) :: isPassedToMethod() && sourceVersionGE(17)
=> java.util.random.RandomGeneratorFactory.of("Random").create($seed$)
=> java.util.random.RandomGeneratorFactory.getDefault().create($seed$)
=> RandomGenerator.getDefault()
;;

<?
public boolean isPassedToMethod() throws Throwable {

    Variable parent = context.parent(context.variableForName("$_"));
    if (parent == null) {
        return false;
    }

    ElementKind kind = context.elementKind(parent);
    return kind == ElementKind.METHOD || kind == ElementKind.CONSTRUCTOR;
}
?>


/*
new java.util.Random($seed$)
=>java.util.random.RandomGeneratorFactory.of("Random").create($seed$)
=>java.util.random.RandomGeneratorFactory.getDefault().create($seed$)
=>RandomGenerator.getDefault()
;;
*/