@lombok.Memoize

Delomboked.java

/*
@lombok.Memoize
final Number test(int a, Double b) {
    return null;
}
*/

class Test{

	@java.lang.SuppressWarnings("all")
	private final java.util.concurrent.ConcurrentHashMap __lombok_test_c_0 = new java.util.concurrent.ConcurrentHashMap();	
	
	@java.lang.SuppressWarnings("all")
	final Number test(int a, Double b) {
		java.util.List l = java.util.Arrays.asList(a, b);
		java.lang.Object[] lock = new java.lang.Object[0];
		java.lang.Object[] ret = (java.lang.Object[])__lombok_test_c_0.putIfAbsent(l, lock);
		if (ret == null) {
			Number __lombok_calc = __lombok_test(a, b);
			ret = new java.lang.Object[]{__lombok_calc};
			__lombok_test_c_0.put(l, ret);
			synchronized (lock) {
				lock.notifyAll();
			}
		} else if (ret.length == 0) {
			lock = ret;
			synchronized (lock) {
				while (ret.length == 0) {
					try {
						lock.wait();
					} catch (InterruptedException e) {
						;
					}
					ret = (java.lang.Object[])__lombok_test_c_0.get(l);
				}
			}
		}
		return (Number)ret[0];
	}

	private Number __lombok_test(int a, Double b) {
		return null;
	}

}