Example usage for java.util ArrayList isEmpty

Introduction

In this page you can find the example usage for java.util ArrayList isEmpty.

Prototype

public boolean isEmpty() 

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:com.ebay.pulsar.sessionizer.cluster.SessionizerLoopbackRingListener.java

@Override
public boolean isLeader() {
    if (shutdownFlag || leavingCluster) {
        return false;
    }//from w ww. j av a2 s .  c  o m
    lock.readLock().lock();
    try {
        ArrayList<Long> copy = new ArrayList<Long>(activeConsumers);
        if (copy.isEmpty()) {
            return false;
        }
        Long maxConsumerId = Collections.max(copy);
        return maxConsumerId == getHostId();
    } finally {
        lock.readLock().unlock();
    }
}

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From source file:ai_coursework.HWState.java

/**
 * Finds all possible and valid successor states from this.state
 * @return A list of all valid successor states
 */// w w w  .j  a  v  a  2  s  .c  o  m
@Override
public List<ActionStatePair> successor() {
    List<ActionStatePair> result = new ArrayList<>();
    ArrayList<Person> bank = raftLocation == RiverBank.NORTH ? northBank : southBank;

    if (this.isInvalid()) // If the current state is invalid
        return result; // Return an emtpy set

    for (int i = 0; i <= HusbandWives.RAFTSIZE && i <= bank.size(); i++) {
        Combinations combo = new Combinations(bank.size(), i);
        Iterator<int[]> iterator = combo.iterator();

        while (iterator.hasNext()) {
            int[] selected = iterator.next();
            ArrayList<Person> raft = new ArrayList<>();

            for (int index : selected) {
                raft.add(bank.get(index));
            }

            if (raft.isEmpty())
                break;

            HWAction action = new HWAction(raft, oppositeBank(raftLocation));
            HWState nextState = this.applyAction(action);
            if (!nextState.isInvalid())
                result.add(new ActionStatePair(action, nextState));
        }
    }

    return result;
}

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From source file:org.khmeracademy.btb.auc.pojo.controller.User_controller.java

@RequestMapping(value = "/get", method = RequestMethod.GET, produces = "application/json")
@ResponseBody/*from w ww  .  j  av  a  2 s  .c om*/
public ResponseEntity<Map<String, Object>> getUser(
        @RequestParam(value = "page", required = false, defaultValue = "1") int page,
        @RequestParam(value = "limit", required = false, defaultValue = "12") int limit) {
    Map<String, Object> map = new HashMap<String, Object>();
    try {
        Pagination pagination = new Pagination();
        pagination.setLimit(limit);
        pagination.setPage(page);
        pagination.setTotalCount(usr_service.countUsers());
        ArrayList<User> user = usr_service.getUsers(pagination);

        if (!user.isEmpty()) {
            map.put("DATA", user);
            map.put("STATUS", true);
            map.put("MESSAGE", "DATA FOUND!");
            map.put("PAGINATION", pagination);
        } else {
            map.put("STATUS", true);
            map.put("MESSAGE", "DATA NOT FOUND");
        }
    } catch (Exception e) {
        map.put("STATUS", false);
        map.put("MESSAGE", "Error!");
        e.printStackTrace();
    }
    return new ResponseEntity<Map<String, Object>>(map, HttpStatus.OK);
}

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From source file:cl.smartcities.isci.transportinspector.fragments.ReportMapFragment.java

/**
 *  action when an event is reported//from  w ww  .  j  a va  2s .  c o m
 *
 *  @param events updated events
 *  @param type   type id (it can be BUS or BUS_TOP)
 *  @param id     license plate or bus-stop code
 * */
@Override
public void update(ArrayList<Event> events, EventRequest.Type type, String id) {
    // send message to the current strategy
    if (events != null && !events.isEmpty()) {
        currentStrategy.updateElementById(events, type, id);
    }
}

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From source file:edu.fullerton.timeseriesapp.TimeSeriesApp.java

private int doPlot() throws SQLException, WebUtilException, LdvTableException, ViewConfigException {
    int ret;/*from ww  w .  j  a  v a2s.co m*/
    HashSet<Integer> selections = getSelections();
    ArrayList<TimeInterval> times = getTimes();
    ArrayList<ChanDataBuffer> data = getData(selections, times);

    if (data.isEmpty()) {
        System.err.println("No data to plot.");
        ret = 3;
    } else {
        makePlot(data, false);
        ret = 0;
    }
    return ret;
}

---

From source file:com.offbynull.voip.kademlia.GraphHelper.java

private void setupRoutingTreeGraph(Context ctx) {
    IdXorMetricComparator idComparator = new IdXorMetricComparator(baseId);

    Map<BitString, Point> processedPrefixes = new HashMap<>(); // prefix -> position on graph
    addRootToGraph(ctx, processedPrefixes);
    routeTreePrefixToIds.put(BitString.createFromString(""), new TreeSet<>(idComparator)); // special case for empty prefix

    LinkedList<BitString> tempPrefixes = new LinkedList<>(routerBucketPrefixes);

    double maxYPosition = Double.MIN_VALUE;
    while (true) {
        // Get next prefixes
        ArrayList<BitString> nextLevelPrefixes = removePrefixesForNextLevel(tempPrefixes);
        if (nextLevelPrefixes.isEmpty()) {
            break;
        }//from  w w  w .j  a  va  2  s .c  o m

        // Find parent
        int bitLengthOfNextLevelPrefixes = nextLevelPrefixes.get(0).getBitLength();
        BitString parentPrefix = getParentPrefix(processedPrefixes.keySet(), nextLevelPrefixes.get(0));
        Point parentPoint = processedPrefixes.get(parentPrefix);

        // Calculate number of bits after parent prefix (the bits to display)
        int newBitsOffset = parentPrefix.getBitLength();
        int newBitsLength = bitLengthOfNextLevelPrefixes - parentPrefix.getBitLength();

        // Calculate starting x and y positions
        double numBranches = 1 << newBitsLength;
        double missingBitLength = baseId.getBitLength() - bitLengthOfNextLevelPrefixes;
        double ySpreadAtLevel = Y_SPREAD * (missingBitLength + 1.0);
        double xSpreadAtLevel = X_SPREAD * (missingBitLength + 1.0);
        double yPosition = parentPoint.y + ySpreadAtLevel; // nodes right below the parent
        double xPosition = parentPoint.x - xSpreadAtLevel * (numBranches - 1.0) / 2.0; // nodes x-centered on parent

        // special-case for netLevelPrefixes where prefix for our baseId doesn't exist... this is the branch that falls further down
        //
        // e.g. If you're 000, prefixes will be 1, 01, 001, 000... but for each of those you'll want to show the falling-thru prefix as
        // well.. for example...
        //
        //                                    /\
        //        (NOT STATED IN PREFIXES) 0 /  \ 1
        //                                  /\
        //     (NOT STATED IN PREFIXES) 00 /  \ 01
        //                                /\
        //      (EXISTS IN PREFIXES) 000 /  \ 001
        //
        // Note that 000 exists, but 00 and 0 don't.
        BitString baseIdPortion = baseId.getBitString().getBits(0, bitLengthOfNextLevelPrefixes);
        if (!nextLevelPrefixes.contains(baseIdPortion)) {
            nextLevelPrefixes.add(baseIdPortion);
        }

        // Make sure smallest branch is always to the left-most by sorting
        Collections.sort(nextLevelPrefixes,
                (x, y) -> Long.compare(x.getBitsAsLong(newBitsOffset, newBitsLength),
                        y.getBitsAsLong(newBitsOffset, newBitsLength)));

        // Add prefixes from routing tree
        for (BitString nextPrefix : nextLevelPrefixes) {
            routeTreePrefixToIds.put(nextPrefix, new TreeSet<>(idComparator));

            addPrefixToGraph(nextPrefix, newBitsOffset, newBitsLength, xPosition, yPosition, ctx, parentPrefix,
                    processedPrefixes);
            xPosition += xSpreadAtLevel;
        }

        // Update max Y position
        maxYPosition = Math.max(maxYPosition, yPosition);
    }
}

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From source file:dk.nsi.haiba.epimibaimporter.email.EmailSender.java

public void send(final Collection<String> unknownBanrSet, final Collection<String> unknownAlnrSet) {
    String not_html = "After the recent import, the following unknown table entries are discovered:\n";
    ArrayList<String> alnrSet = new ArrayList<String>(unknownAlnrSet);
    Collections.sort(alnrSet, AlphanumComparator.INSTANCE);
    ArrayList<String> banrSet = new ArrayList<String>(unknownBanrSet);
    Collections.sort(banrSet, AlphanumComparator.INSTANCE);
    if (!alnrSet.isEmpty()) {
        not_html += "-----\n";
        not_html += "alnr:\n";
        String delim = "";
        for (String alnr : alnrSet) {
            not_html += delim + alnr;/* w  w w.j a va  2s .  c o  m*/
            delim = ", ";
        }
        not_html += "\n";
    }
    if (!banrSet.isEmpty()) {
        not_html += "-----\n";
        not_html += "banr:\n";
        String delim = "";
        for (String banr : banrSet) {
            not_html += delim + banr;
            delim = ", ";
        }
        not_html += "\n";
    }
    sendText("EPIMIBA: Notification on unknown table entries", not_html);
}

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From source file:org.shareok.data.plosdata.PlosDoiDataImpl.java

@Override
public void getDspaceLoadingData(String fileName) throws Exception {
    importData(fileName);/*ww  w  .j a  va2s  .c  o m*/
    ArrayList<String> doiList = getDoiData();
    if (!doiList.isEmpty()) {

        PlosRequest req = (PlosRequest) PlosUtil.getPlosContext().getBean("plosRequest");
        PlosData plosData = (PlosData) PlosUtil.getPlosContext().getBean("plosData");

        for (String doi : doiList) {
            String[] valArray = doi.split("---");
            String isPartOfSeries = valArray[0];
            String[] doiArr = valArray[1].split(":");
            doi = doiArr[0];
            plosData = getDspaceJournalLoadingFilesBySingleDoi(doi);
            plosDataList.add(plosData);
        }
    }
}

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From source file:com.globocom.grou.report.ts.opentsdb.OpenTSDBClient.java

private ArrayList<HashMap<String, Object>> metrics(Test test) {
    long testCreated = TimeUnit.MILLISECONDS.toSeconds(test.getCreatedDate().getTime());
    long testLastModified = TimeUnit.MILLISECONDS.toSeconds(test.getLastModifiedDate().getTime());
    final List<Query> queries = prepareQueries(test, testCreated, testLastModified);
    final ArrayList<HashMap<String, Object>> listOfResult = doRequest(testCreated, testLastModified, queries);

    try {/*from www. j  a  va 2  s  .co  m*/
        if (listOfResult.isEmpty()) {
            return mapper.readValue("[{\"error\":\" OpenTSDB result is EMPTY \"}]", typeRef);
        } else {
            return listOfResult;
        }
    } catch (IOException e) {
        LOGGER.error(e.getMessage(), e);
    }
    return null;
}

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From source file:org.springframework.cloud.netflix.hystrix.amqp.HystrixStreamTask.java

@Scheduled(fixedRateString = "${hystrix.stream.amqp.sendRate:500}")
public void sendMetrics() {
    ArrayList<String> metrics = new ArrayList<>();
    this.jsonMetrics.drainTo(metrics);

    if (!metrics.isEmpty()) {
        if (log.isTraceEnabled()) {
            log.trace("sending amqp metrics size: " + metrics.size());
        }/* ww  w. j  a  v a  2s .  c o m*/
        for (String json : metrics) {
            // TODO: batch all metrics to one message
            try {
                this.channel.send(json);
            } catch (Exception ex) {
                if (log.isTraceEnabled()) {
                    log.trace("failed sending amqp metrics: " + ex.getMessage());
                }
            }
        }
    }
}

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