public abstract static class MapBlock {
	public Object[] run(Object[] list) {
	    Object[] out = new Object[list.length];
	    // begin loop through list
	    for (int i = 0; i < list.length; i++) {
		  // call processElement on ourself and collect element returned
	      Object new_obj = this.processElement(list[i]);
		  out[i] = new_obj;
	    }
	    return out;
	}
	public abstract Object processElement(Object obj);
	// This might alternatively return an Object array for greater flexibility.
	// 'run' would require slight alterations to deal with an array coming back.
	// Thanks for the idea to [jdporter]

    }