OptionalHelper.java

import java.util.*;
import java.util.function.*;

    class OptionalHelper<A> {

        private List<Supplier<A>> suppliers = new LinkedList<>();

        private OptionalHelper() {}

        public static <A> OptionalHelper<A> of(Supplier<A> supplier) {
            val helper = new OptionalHelper<A>();
            helper.suppliers.add(supplier);
            return helper;
        }

        public OptionalHelper<A> orElse(Supplier<A> supplier) {
            suppliers.add(supplier);
            return this;
        }

        public A get() {
            for (val supplier : suppliers) {
                val result = supplier.get();
                if (result != null) {
                    return result;
                }
            }
            return null;
        }

    }