Musings about checked exceptions in Xtend

Client.xtend

import static extension Throwables.*

val uri = [| new URI(requestURI) ].onException [
  new IllegalArgumentException(it)
]

Java7.java

try {
  URI uri = new URI(requestUri);
  ..
} catch (URISyntaxException e) {
  throw new RuntimeException(e);
}

Java8.java

URI uri = Throwables.propagate(
  () -> new URI(requestUri));
// or even
URI uri = Throwables.propagate(
  () -> new URI(requestUri),
  IllegalArgumentException::new);

Java8Again.java

URI uri = Throwables.propagate(
  () -> new URI(requestUri),
  (e) -> new IllegalArgumentException(e));

Throwables.xtend

class Throwables {
  def static <T> T onException(
        ()=>T proc, 
        (Exception)=>Exception handler) {
    try {
      proc.apply
    } catch(Exception e) {
      throw handler.apply(e)
    }
  }
}

Xtend.xtend

val uri = new URI(requestURI)