Utils.java
/*
* Copyright (C) 2003-2011 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.exoplatform.poll.service;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.HashSet;
import java.util.List;
import org.apache.commons.lang.StringUtils;
public class Utils {
public static final String COLON = ":".intern();
public static final int MAX_TITLE = 255;
public static Calendar getGreenwichMeanTime() {
Calendar calendar = GregorianCalendar.getInstance();
calendar.setLenient(false);
int gmtoffset = calendar.get(Calendar.DST_OFFSET) + calendar.get(Calendar.ZONE_OFFSET);
calendar.setTimeInMillis(System.currentTimeMillis() - gmtoffset);
return calendar;
}
public static boolean isEmpty(String s) {
return (s == null || s.trim().length() <= 0) ? true : false;
}
public static boolean isListEmpty(List<String> list) {
if (list == null || list.size() == 0) {
return true;
}
for (String string : list) {
if (!isEmpty(string)) {
return false;
}
}
return true;
}
/**
* Calculate data of poll when user Voted. Apply for all case (Single vote and multi vote)
*
* @param poll the poll after user vote.
* @param userId the user name voted.
* @param voteOptions the value user voted.
* - If is single vote, the value is one number.
* - If is multi vote, the value has format a:b:c, with a,b,c is number user selected.
* @throws Exception the exception
*/
public static Poll calculateVote(Poll poll, String userId, String voteOptions) throws Exception {
List<String> userVote = new ArrayList<String>(Arrays.asList(poll.getUserVote()));
// remove current vote (if exist) to vote again
String currentVote = "";
for (String uv : userVote) {
if (uv.startsWith(userId + COLON)) {
currentVote = uv;
break;
}
}
userVote.remove(currentVote);
if(voteOptions.indexOf(COLON) > 0) {
voteOptions = StringUtils.join(new HashSet<String>(Arrays.asList(voteOptions.split(COLON))), COLON);
}
// add the new vote
userVote.add(userId + COLON + voteOptions);
// calculating...
int[] votes = new int[poll.getOption().length];
int total = userVote.size();
for (String uv : userVote) {
String[] uvArr = uv.split(COLON);
for (int i = 1; i < uvArr.length; i++) {
votes[Integer.parseInt(uvArr[i].trim())]++;
}
}
String[] sVotes = new String[votes.length];
for (int i = 0; i < sVotes.length; i++) {
sVotes[i] = ((float) votes[i] / total * 100) + "";
}
// update the poll
poll.setUserVote(userVote.toArray(new String[0]));
poll.setVote(sVotes);
return poll;
}
/**
* Get a string from infoVote of poll
*
* @param poll
* @return
*/
public static String getInfoVote(Poll poll) {
//String s = "";
StringBuilder sb = new StringBuilder();
String[] infoVote = poll.getInfoVote();
String[] options = poll.getOption();
if (infoVote == null) {
for (int j=0; j<options.length; j++) {
sb.append(options[j]).append(":0%:0|");
}
sb.append("0");
} else {
for (int i=0; i<infoVote.length-1; i++) {
String[] list = infoVote[i].split(":");
if (Integer.parseInt(list[1].split("\\.")[0]) > 1) {
sb.append(options[i]).append(":").append(list[0]).append("%:").append(list[1].split("\\.")[0]).append("|");
} else {
sb.append(options[i]).append(":").append(list[0]).append("%:").append(list[1].split("\\.")[0]).append("|");
}
}
if (Integer.parseInt(infoVote[infoVote.length-1]) > 1) {
sb.append(infoVote[infoVote.length-1]);
} else {
sb.append(infoVote[infoVote.length-1]);
}
}
return sb.toString();
}
/**
* Convert userVote of poll to s string
*
* @param poll
* @param userName
* @return
*/
public static String getUserVote(Poll poll, String userName) {
StringBuilder sb = new StringBuilder();
String[] votes = poll.getUserVote();
String[] options = poll.getOption();
if (votes.length == 0) return sb.toString().trim();
for (String element : votes) {
String[] userVote = element.split(":");
if (userVote[0].equals(userName)) {
for (int i=1;i<userVote.length;i++) {
int j = Integer.parseInt(userVote[i]);
sb.append(" ").append(options[j]);
}
}
}
return sb.toString().trim();
}
public static String getCurrentUserVote(Poll poll) {
String[] votes = poll.getUserVote();
if (votes.length == 0) {
return poll.getOwner();
}
return votes[votes.length-1].split(":")[0];
}
}