#fixed code
                                public String getCitation(boolean isOnlineVersion, DatasetVersion version) {
        return version.getCitation(isOnlineVersion);
    }
#vulnerable code 
                                public String getCitation(boolean isOnlineVersion, DatasetVersion version) {


        String str = "";

        boolean includeAffiliation = false;
        String authors = version.getAuthorsStr(includeAffiliation);
        if (!StringUtil.isEmpty(authors)) {
            str += authors;
        }

        if (this.getPublicationDate() == null || StringUtil.isEmpty(this.getPublicationDate().toString())) {
            //if not released use current year
            if (!StringUtil.isEmpty(str)) {
                str += ", ";
            }
            str +=  new SimpleDateFormat("yyyy").format(new Timestamp(new Date().getTime())) ;
        } else  {
            if (!StringUtil.isEmpty(str)) {
                str += ", ";
            }
            str += new SimpleDateFormat("yyyy").format(new Timestamp(this.getPublicationDate().getTime()));             
        } 

        if ( version.getTitle() != null ) {
            if (!StringUtil.isEmpty(version.getTitle())) {
                if (!StringUtil.isEmpty(str)) {
                    str += ", ";
                }
                str += "\"" + version.getTitle() + "\"";
            }
        }
        if (!StringUtil.isEmpty(this.getIdentifier())) {
            if (!StringUtil.isEmpty(str)) {
                str += ", ";
            }
            if (isOnlineVersion) {
                str += "<a href=\"" + this.getPersistentURL() + "\">" + this.getIdentifier() + "</a>";
            } else {
                str += this.getPersistentURL();
            }
        }

        //Get root dataverse name for Citation
        Dataverse root = this.getOwner();
        while (root.getOwner() != null) {
            root = root.getOwner();
        }
        String rootDataverseName = root.getName();
        if (!StringUtil.isEmpty(rootDataverseName)) {
            if (!StringUtil.isEmpty(str)) {
                str += ", ";
            }
            str += " " + rootDataverseName + " ";
        }

        if (version.getVersionNumber() != null) {
            if (!StringUtil.isEmpty(str)) {
                str += ", ";
            }
            str += " V" + version.getVersionNumber();
            str += " [Version]";
        }
        /*UNF is not calculated yet
         if (!StringUtil.isEmpty(getUNF())) {
         if (!StringUtil.isEmpty(str)) {
         str += " ";
         }
         str += getUNF();
         }
         String distributorNames = getDistributorNames();
         if (distributorNames.trim().length() > 0) {
         str += " " + distributorNames;
         str += " [Distributor]";
         }*/
        return str;
    } 
                            #location 46 
                            #vulnerability type NULL_DEREFERENCE