@SuppressWarnings("unchecked") private String getCopyrightOwnersIdString(Collection contributors) { ArrayList names = new ArrayList(); Iterator it = contributors.iterator(); while (it.hasNext()) { PageContributor contr = (PageContributor) it.next(); if (contr.getIsCopyOwner()) { names.add(contr.getContributor().getId()); } } return StringUtils.returnCommaJoinedString(names); }