Tuesday, December 29, 2009

Syntax Hell

As anyone who has applied a more functional style to Java will realize, the Java syntax really gets in the way. I was using my usual guinea pig, JRDF, with "with" so you don't have to iterate but apply a function and so you don't have to close a ClosableIterator. The typical code to print out the graph is:
ClosableIterable<Triple> triples = graph.find(ANY_TRIPLE);
try {
   for (Triple triple : triples) {
     System.out.println("Graph: " + triple);
 } finally {

Using "ClosableIterators.with" this becomes:
with(graph.find(ANY_TRIPLE), new Function<Void, ClosableIterable<Triple>>() {
   public Void apply(ClosableIterable<Triple> object) {
     for (Triple triple : object) {
       System.out.println("Graph: " + triple);
     return null;
It's typically one line less but that's not that much of an improvement.