boon/src/main/java/org/boon/core/reflection/BeanUtils.java
private static Object getCollectionProp(Object o, String propName, int index, String[] path
                                           ) {
        o = _getFieldValuesFromCollectionOrArray(o, propName);

        if ( index + 1 == path.length ) {
            return o;
        } else {
            index++;
            return getCollectionProp(o, path[index], index, path);
        }
    }
private static Object getCollectionProp(Object o, String propName, int index, String[] path
                                           ) {
        o = _getFieldValuesFromCollectionOrArray(o, propName);

        if ( index + 1 == path.length ) {
            return o;
        } else {
            index++;
            return getCollectionProp(o, path[index], index, path);
        }
    }
This is an amazing little recursive method. It walks a fanout of
nested collection to pull out the leaf nodes