Review

class ReflectionToStringBuilder {
    /**
     * Converts the given Collection into an array of Strings. The returned array does not contain <code>null</code>
     * entries. Note that {@link Arrays#sort(Object[])} will throw an {@link NullPointerException} if an array element 
     * is <code>null</code>.
     * 
     * @param collection
     *            The collection to convert
     * @return A new array of Strings.
     */
    static String[] toNoNullStringArray(Collection collection) {
        if (collection == null) {
            return ArrayUtils.EMPTY_STRING_ARRAY;
        }
        return toNoNullStringArray(collection.toArray());
    }

}