private DefaultMutableTreeNode newTreeNode(Study study, VDC vdc) { String url = null; if (studyUrl != null) { url = appendParameterToUrl("/dvn/dv/" + vdc.getAlias() + studyUrl, "studyId=" + study.getId()); } StudyUI studyUI = new StudyUI(study); String studyText = studyUI.getMetadata().getTitle(); if (!StringUtil.isEmpty(studyUI.getAuthors())) { studyText += " by " + studyUI.getAuthors(); } return newTreeNode(studyText, url, false); }