Example usage for java.text DecimalFormat setGroupingUsed

List of usage examples for java.text DecimalFormat setGroupingUsed

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Introduction

In this page you can find the example usage for java.text DecimalFormat setGroupingUsed.

Prototype

@Override
public void setGroupingUsed(boolean newValue)

Source Link

Usage

From source file:org.matsim.contrib.drt.analysis.DynModeTripsAnalyser.java

public static String summarizeTrips(List<DynModeTrip> trips, String delimiter) {
    DescriptiveStatistics waitStats = new DescriptiveStatistics();
    DescriptiveStatistics rideStats = new DescriptiveStatistics();
    DescriptiveStatistics distanceStats = new DescriptiveStatistics();
    DescriptiveStatistics directDistanceStats = new DescriptiveStatistics();

    DescriptiveStatistics traveltimes = new DescriptiveStatistics();

    DecimalFormat format = new DecimalFormat();
    format.setDecimalFormatSymbols(new DecimalFormatSymbols(Locale.US));
    format.setMinimumIntegerDigits(1);/* www  .  ja  v a 2  s .c  o m*/
    format.setMaximumFractionDigits(2);
    format.setGroupingUsed(false);

    for (DynModeTrip trip : trips) {
        if (trip.getToLinkId() == null) {
            continue;
        }
        waitStats.addValue(trip.getWaitTime());
        rideStats.addValue(trip.getInVehicleTravelTime());
        distanceStats.addValue(trip.getTravelDistance());
        directDistanceStats.addValue(trip.getUnsharedDistanceEstimate_m());
        traveltimes.addValue(trip.getInVehicleTravelTime() + trip.getWaitTime());
    }
    String value = format.format(waitStats.getValues().length) + delimiter + format.format(waitStats.getMean())
            + delimiter + format.format(waitStats.getMax()) + delimiter
            + format.format(waitStats.getPercentile(95)) + delimiter
            + format.format(waitStats.getPercentile(75)) + delimiter
            + format.format(waitStats.getPercentile(50)) + delimiter + format.format(rideStats.getMean())
            + delimiter + format.format(distanceStats.getMean()) + delimiter
            + format.format(directDistanceStats.getMean()) + delimiter + format.format(traveltimes.getMean());
    return value;
}

From source file:org.onebusaway.nyc.presentation.impl.realtime.SiriSupport.java

private static OnwardCallStructure getOnwardCallStructure(StopBean stopBean,
        PresentationService presentationService, double distanceOfCallAlongTrip,
        double distanceOfVehicleFromCall, int visitNumber, int index, TimepointPredictionRecord prediction,
        long responseTimestamp) {

    OnwardCallStructure onwardCallStructure = new OnwardCallStructure();
    onwardCallStructure.setVisitNumber(BigInteger.valueOf(visitNumber));

    StopPointRefStructure stopPointRef = new StopPointRefStructure();
    stopPointRef.setValue(stopBean.getId());
    onwardCallStructure.setStopPointRef(stopPointRef);

    NaturalLanguageStringStructure stopPoint = new NaturalLanguageStringStructure();
    stopPoint.setValue(stopBean.getName());
    onwardCallStructure.setStopPointName(stopPoint);

    if (prediction != null) {
        if (prediction.getTimepointPredictedTime() < responseTimestamp) {
            onwardCallStructure.setExpectedArrivalTime(new Date(responseTimestamp));
            onwardCallStructure.setExpectedDepartureTime(new Date(responseTimestamp));
        } else {//from w  ww .j a  v a  2 s. c  o m
            onwardCallStructure.setExpectedArrivalTime(new Date(prediction.getTimepointPredictedTime()));
            onwardCallStructure.setExpectedDepartureTime(new Date(prediction.getTimepointPredictedTime()));
        }
    }

    // siri extensions
    SiriExtensionWrapper wrapper = new SiriExtensionWrapper();
    ExtensionsStructure distancesExtensions = new ExtensionsStructure();
    SiriDistanceExtension distances = new SiriDistanceExtension();

    DecimalFormat df = new DecimalFormat();
    df.setMaximumFractionDigits(2);
    df.setGroupingUsed(false);

    distances.setStopsFromCall(index);
    distances.setCallDistanceAlongRoute(Double.valueOf(df.format(distanceOfCallAlongTrip)));
    distances.setDistanceFromCall(Double.valueOf(df.format(distanceOfVehicleFromCall)));
    distances.setPresentableDistance(presentationService.getPresentableDistance(distances));

    wrapper.setDistances(distances);
    distancesExtensions.setAny(wrapper);
    onwardCallStructure.setExtensions(distancesExtensions);

    return onwardCallStructure;
}

From source file:org.onebusaway.nyc.presentation.impl.realtime.SiriSupport.java

private static MonitoredCallStructure getMonitoredCallStructure(StopBean stopBean,
        PresentationService presentationService, double distanceOfCallAlongTrip,
        double distanceOfVehicleFromCall, int visitNumber, int index, TimepointPredictionRecord prediction,
        long responseTimestamp) {

    MonitoredCallStructure monitoredCallStructure = new MonitoredCallStructure();
    monitoredCallStructure.setVisitNumber(BigInteger.valueOf(visitNumber));

    StopPointRefStructure stopPointRef = new StopPointRefStructure();
    stopPointRef.setValue(stopBean.getId());
    monitoredCallStructure.setStopPointRef(stopPointRef);

    NaturalLanguageStringStructure stopPoint = new NaturalLanguageStringStructure();
    stopPoint.setValue(stopBean.getName());
    monitoredCallStructure.setStopPointName(stopPoint);

    if (prediction != null) {
        // do not allow predicted times to be less than ResponseTimestamp
        if (prediction.getTimepointPredictedTime() < responseTimestamp) {
            /*/*from  ww  w.  j  ava  2 s.  c  o  m*/
             * monitoredCall has less precision than onwardCall (date vs. timestamp)
             * which results in a small amount of error when converting back to timestamp.
             * Add a second here to prevent negative values from showing up in the UI 
             * (actual precision of the value is 1 minute, so a second has little influence)
             */
            monitoredCallStructure.setExpectedArrivalTime(new Date(responseTimestamp + 1000));
            monitoredCallStructure.setExpectedDepartureTime(new Date(responseTimestamp + 1000));
        } else {
            monitoredCallStructure.setExpectedArrivalTime(new Date(prediction.getTimepointPredictedTime()));
            monitoredCallStructure.setExpectedDepartureTime(new Date(prediction.getTimepointPredictedTime()));
        }

    }

    // siri extensions
    SiriExtensionWrapper wrapper = new SiriExtensionWrapper();
    ExtensionsStructure distancesExtensions = new ExtensionsStructure();
    SiriDistanceExtension distances = new SiriDistanceExtension();

    DecimalFormat df = new DecimalFormat();
    df.setMaximumFractionDigits(2);
    df.setGroupingUsed(false);

    distances.setStopsFromCall(index);
    distances.setCallDistanceAlongRoute(Double.valueOf(df.format(distanceOfCallAlongTrip)));
    distances.setDistanceFromCall(Double.valueOf(df.format(distanceOfVehicleFromCall)));
    distances.setPresentableDistance(presentationService.getPresentableDistance(distances));

    wrapper.setDistances(distances);
    distancesExtensions.setAny(wrapper);
    monitoredCallStructure.setExtensions(distancesExtensions);

    return monitoredCallStructure;
}

From source file:org.matsim.contrib.drt.analysis.DynModeTripsAnalyser.java

public static void analyseWaitTimes(String fileName, List<DynModeTrip> trips, int binsize_s) {
    Collections.sort(trips);//  ww w .  j  a v a  2  s  .co m
    if (trips.size() == 0)
        return;
    int startTime = ((int) (trips.get(0).getDepartureTime() / binsize_s)) * binsize_s;
    int endTime = ((int) (trips.get(trips.size() - 1).getDepartureTime() / binsize_s) + binsize_s) * binsize_s;
    Map<Double, List<DynModeTrip>> splitTrips = splitTripsIntoBins(trips, startTime, endTime, binsize_s);

    DecimalFormat format = new DecimalFormat();
    format.setDecimalFormatSymbols(new DecimalFormatSymbols(Locale.US));
    format.setMinimumIntegerDigits(1);
    format.setMaximumFractionDigits(2);
    format.setGroupingUsed(false);

    SimpleDateFormat sdf2 = new SimpleDateFormat("HH:mm:ss");

    BufferedWriter bw = IOUtils.getBufferedWriter(fileName + ".csv");
    TimeSeriesCollection dataset = new TimeSeriesCollection();
    TimeSeriesCollection datasetrequ = new TimeSeriesCollection();
    TimeSeries averageWaitC = new TimeSeries("average");
    TimeSeries medianWait = new TimeSeries("median");
    TimeSeries p_5Wait = new TimeSeries("5th percentile");
    TimeSeries p_95Wait = new TimeSeries("95th percentile");
    TimeSeries requests = new TimeSeries("Ride requests");

    try {
        bw.write("timebin;trips;average_wait;min;p_5;p_25;median;p_75;p_95;max");
        for (Entry<Double, List<DynModeTrip>> e : splitTrips.entrySet()) {
            long rides = 0;
            double averageWait = 0;
            double min = 0;
            double p_5 = 0;
            double p_25 = 0;
            double median = 0;
            double p_75 = 0;
            double p_95 = 0;
            double max = 0;
            if (!e.getValue().isEmpty()) {
                DescriptiveStatistics stats = new DescriptiveStatistics();
                for (DynModeTrip t : e.getValue()) {
                    stats.addValue(t.getWaitTime());
                }
                rides = stats.getN();
                averageWait = stats.getMean();
                min = stats.getMin();
                p_5 = stats.getPercentile(5);
                p_25 = stats.getPercentile(25);
                median = stats.getPercentile(50);
                p_75 = stats.getPercentile(75);
                p_95 = stats.getPercentile(95);
                max = stats.getMax();

            }
            Minute h = new Minute(sdf2.parse(Time.writeTime(e.getKey())));

            medianWait.addOrUpdate(h, Double.valueOf(median));
            averageWaitC.addOrUpdate(h, Double.valueOf(averageWait));
            p_5Wait.addOrUpdate(h, Double.valueOf(p_5));
            p_95Wait.addOrUpdate(h, Double.valueOf(p_95));
            requests.addOrUpdate(h, rides * 3600. / binsize_s);// normalised [req/h]
            bw.newLine();
            bw.write(Time.writeTime(e.getKey()) + ";" + rides + ";" + format.format(averageWait) + ";"
                    + format.format(min) + ";" + format.format(p_5) + ";" + format.format(p_25) + ";"
                    + format.format(median) + ";" + format.format(p_75) + ";" + format.format(p_95) + ";"
                    + format.format(max));

        }
        bw.flush();
        bw.close();
        dataset.addSeries(averageWaitC);
        dataset.addSeries(medianWait);
        dataset.addSeries(p_5Wait);
        dataset.addSeries(p_95Wait);
        datasetrequ.addSeries(requests);
        JFreeChart chart = chartProfile(splitTrips.size(), dataset, "Waiting times", "Wait time (s)");
        JFreeChart chart2 = chartProfile(splitTrips.size(), datasetrequ, "Ride requests per hour",
                "Requests per hour (req/h)");
        ChartSaveUtils.saveAsPNG(chart, fileName, 1500, 1000);
        ChartSaveUtils.saveAsPNG(chart2, fileName + "_requests", 1500, 1000);

    } catch (IOException | ParseException e) {

        e.printStackTrace();
    }

}

From source file:com.itude.mobile.android.util.StringUtil.java

/**
 * Format {@link String} as a Volume/*from   ww  w  .j  ava2 s.co m*/
 *  
 * WARNING: Only use this method to present data to the screen
 * 
 * @param locale {@link Locale}
 * @param stringToFormat  {@link String} to format
 * @return a string formatted as a volume with group separators (eg, 131.224.000) assuming the receiver is an int string read from XML
 */
public static String formatVolume(Locale locale, String stringToFormat) {
    if (stringToFormat == null || stringToFormat.length() == 0) {
        return null;
    }

    String result = null;

    DecimalFormat formatter = new DecimalFormat();
    formatter.setDecimalFormatSymbols(new DecimalFormatSymbols(locale));

    formatter.setGroupingUsed(true);
    formatter.setGroupingSize(3);
    formatter.setMaximumFractionDigits(0);

    result = formatter.format(Double.parseDouble(stringToFormat));

    return result;
}

From source file:org.mitre.ccv.mapred.CompleteCompositionVectorUtils.java

/**
 * Writes out the {@link SequenceFile} feature vectors in row major (packed) order. No labels are outputed.
 *
 * @param jobConf//from w  w  w  . ja v  a  2s .  c o  m
 * @param input     top level SequenceFile directory path
 * @param output    path to output the matrix
 * @param digits    the maximum number of fraction digits
 * @throws IOException
 */
public static void featureVectors2RowMajorMatrix(JobConf jobConf, String input, String output, int digits)
        throws IOException {
    JobConf conf = new JobConf(jobConf, CalculateCosineDistanceMatrix.class);

    DecimalFormat format = new DecimalFormat();
    format.setDecimalFormatSymbols(new DecimalFormatSymbols(Locale.US));
    format.setMinimumIntegerDigits(1);
    format.setMaximumFractionDigits(digits);
    //format.setMinimumFractionDigits(fractionDigits);
    format.setGroupingUsed(false);

    final Path inputPath = new Path(input);
    final FileSystem fs = inputPath.getFileSystem(conf);
    final Path qInputPath = fs.makeQualified(inputPath);
    final Path outputPath = new Path(output);
    Path[] paths = FileUtils.ls(conf, qInputPath.toString() + Path.SEPARATOR + "part-*");

    FSDataOutputStream fos = fs.create(outputPath, true); // throws nothing!
    final Writer writer = new OutputStreamWriter(fos);
    final Text key = new Text();
    final SparseVectorWritable value = new SparseVectorWritable();
    for (int idx = 0; idx < paths.length; idx++) {
        SequenceFile.Reader reader = new SequenceFile.Reader(fs, paths[idx], conf);
        boolean hasNext = reader.next(key, value);
        while (hasNext) {

            final SparseVector vector = value.get();
            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < vector.getCardinality(); i++) {
                final String s = format.format(vector.get(i)); // format the number
                sb.append(s);
                sb.append(' ');
            }
            writer.write(sb.toString());
            hasNext = reader.next(key, value);
        }
        try {
            writer.flush();
            reader.close();
        } catch (IOException ioe) {
            // closing the SequenceFile.Reader will throw an exception if the file is over some unknown size
            LOG.debug("Probably caused by closing the SequenceFile.Reader. All is well", ioe);
        }
    }
    try {
        writer.close();
        fos.flush();
        fos.close();
    } catch (IOException ioe) {
        LOG.debug("Caused by distributed cache output stream.", ioe);
    }
}

From source file:org.onebusaway.presentation.impl.realtime.SiriSupport.java

private static OnwardCallStructure getOnwardCallStructure(StopBean stopBean,
        PresentationService presentationService, double distanceOfCallAlongTrip,
        double distanceOfVehicleFromCall, int visitNumber, int index, TimepointPredictionRecord prediction,
        boolean hasRealtimeData, long responseTimestamp, long scheduledArrivalTime) {

    OnwardCallStructure onwardCallStructure = new OnwardCallStructure();
    onwardCallStructure.setVisitNumber(BigInteger.valueOf(visitNumber));

    StopPointRefStructure stopPointRef = new StopPointRefStructure();
    stopPointRef.setValue(stopBean.getId());
    onwardCallStructure.setStopPointRef(stopPointRef);

    if (stopBean.getCode() != null) {
        // Agency's prefer stop code display in UI, so override platform name for this use
        NaturalLanguageStringStructure platform = new NaturalLanguageStringStructure();
        platform.setValue(stopBean.getCode());
        onwardCallStructure.setArrivalPlatformName(platform);
    }//from w  w  w  .  java  2  s. co  m

    NaturalLanguageStringStructure stopPoint = new NaturalLanguageStringStructure();
    stopPoint.setValue(stopBean.getName());
    onwardCallStructure.setStopPointName(stopPoint);

    if (prediction != null) {
        if (prediction.getTimepointPredictedArrivalTime() < responseTimestamp) {
            onwardCallStructure.setExpectedArrivalTime(new Date(responseTimestamp));
            onwardCallStructure.setExpectedDepartureTime(new Date(responseTimestamp));
        } else {
            onwardCallStructure.setExpectedArrivalTime(new Date(prediction.getTimepointPredictedArrivalTime()));
            onwardCallStructure
                    .setExpectedDepartureTime(new Date(prediction.getTimepointPredictedDepartureTime()));
        }
    } else if (!hasRealtimeData) {
        _log.debug("using arrival time of " + new Date(scheduledArrivalTime));
        onwardCallStructure.setExpectedArrivalTime(new Date(scheduledArrivalTime));
        onwardCallStructure.setExpectedDepartureTime(new Date(scheduledArrivalTime));
    }

    // siri extensions
    SiriExtensionWrapper wrapper = new SiriExtensionWrapper();
    ExtensionsStructure distancesExtensions = new ExtensionsStructure();
    SiriDistanceExtension distances = new SiriDistanceExtension();

    DecimalFormat df = new DecimalFormat();
    df.setMaximumFractionDigits(2);
    df.setGroupingUsed(false);

    distances.setStopsFromCall(index);
    distances.setCallDistanceAlongRoute(NumberUtils.toDouble(df.format(distanceOfCallAlongTrip)));
    distances.setDistanceFromCall(NumberUtils.toDouble(df.format(distanceOfVehicleFromCall)));
    distances.setPresentableDistance(presentationService.getPresentableDistance(distances));

    wrapper.setDistances(distances);
    distancesExtensions.setAny(wrapper);
    onwardCallStructure.setExtensions(distancesExtensions);

    return onwardCallStructure;
}

From source file:org.mitre.ccv.mapred.CalculateCosineDistanceMatrix.java

/**
 * Writes out the matrix in row major (packed) order. No labels are outputed.
 *
 * @param jobConf//from  w  ww . j a  v  a2  s . c o m
 * @param input
 * @param output
 * @param digits
 * @throws IOException
 */
public static void printRowMajorMatrix(JobConf jobConf, String input, String output, int digits)
        throws IOException {
    JobConf conf = new JobConf(jobConf, CalculateCosineDistanceMatrix.class);

    DecimalFormat format = new DecimalFormat();
    format.setDecimalFormatSymbols(new DecimalFormatSymbols(Locale.US));
    format.setMinimumIntegerDigits(1);
    format.setMaximumFractionDigits(digits);
    //format.setMinimumFractionDigits(fractionDigits);
    format.setGroupingUsed(false);

    final Path inputPath = new Path(input);
    final FileSystem fs = inputPath.getFileSystem(conf);
    final Path qInputPath = fs.makeQualified(inputPath);
    final Path outputPath = new Path(output);
    Path[] paths = FileUtils.ls(conf, qInputPath.toString() + Path.SEPARATOR + "part-*");

    FSDataOutputStream fos = fs.create(outputPath, true); // throws nothing!
    final Writer writer = new OutputStreamWriter(fos);
    final Text key = new Text();
    final DenseVectorWritable value = new DenseVectorWritable();
    for (int idx = 0; idx < paths.length; idx++) {
        SequenceFile.Reader reader = new SequenceFile.Reader(fs, paths[idx], conf);
        boolean hasNext = reader.next(key, value);
        while (hasNext) {

            final DenseVector vector = value.get();
            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < vector.getCardinality(); i++) {
                final String s = format.format(vector.get(i)); // format the number
                sb.append(s);
                sb.append(' ');
            }
            writer.write(sb.toString());
            hasNext = reader.next(key, value);
        }
        try {
            writer.flush();
            reader.close();
        } catch (IOException ioe) {
            // closing the SequenceFile.Reader will throw an exception if the file is over some unknown size
            LOG.debug("Probably caused by closing the SequenceFile.Reader. All is well", ioe);
        }
    }
    try {
        writer.close();
        fos.flush();
        fos.close();
    } catch (IOException ioe) {
        LOG.debug("Caused by distributed cache output stream.", ioe);
    }
}

From source file:org.onebusaway.presentation.impl.realtime.SiriSupport.java

private static MonitoredCallStructure getMonitoredCallStructure(StopBean stopBean,
        PresentationService presentationService, double distanceOfCallAlongTrip,
        double distanceOfVehicleFromCall, int visitNumber, int index, TimepointPredictionRecord prediction,
        boolean hasRealtimeData, long responseTimestamp, long scheduledArrivalTime) {

    MonitoredCallStructure monitoredCallStructure = new MonitoredCallStructure();
    monitoredCallStructure.setVisitNumber(BigInteger.valueOf(visitNumber));

    StopPointRefStructure stopPointRef = new StopPointRefStructure();
    stopPointRef.setValue(stopBean.getId());
    monitoredCallStructure.setStopPointRef(stopPointRef);

    NaturalLanguageStringStructure stopPoint = new NaturalLanguageStringStructure();
    stopPoint.setValue(stopBean.getName());
    monitoredCallStructure.setStopPointName(stopPoint);

    if (prediction != null) {
        if (!hasRealtimeData) {
            monitoredCallStructure.setExpectedArrivalTime(new Date(prediction.getTimepointScheduledTime()));
            monitoredCallStructure.setExpectedDepartureTime(new Date(prediction.getTimepointScheduledTime()));
        }/* w  w  w  .  j  a  v a  2s .  c om*/
        // do not allow predicted times to be less than ResponseTimestamp
        else if (prediction.getTimepointPredictedArrivalTime() < responseTimestamp) {
            /*
             * monitoredCall has less precision than onwardCall (date vs. timestamp)
             * which results in a small amount of error when converting back to timestamp.
             * Add a second here to prevent negative values from showing up in the UI 
             * (actual precision of the value is 1 minute, so a second has little influence)
             */
            monitoredCallStructure.setExpectedArrivalTime(new Date(responseTimestamp + 1000));
            monitoredCallStructure.setExpectedDepartureTime(new Date(responseTimestamp + 1000));
        } else {
            monitoredCallStructure
                    .setExpectedArrivalTime(new Date(prediction.getTimepointPredictedArrivalTime()));
            monitoredCallStructure
                    .setExpectedDepartureTime(new Date(prediction.getTimepointPredictedArrivalTime()));
        }
    } else if (!hasRealtimeData) {
        monitoredCallStructure.setExpectedArrivalTime(new Date(scheduledArrivalTime));
        monitoredCallStructure.setExpectedDepartureTime(new Date(scheduledArrivalTime));
    }

    //setting the scheduled arrival time.
    if (monitoredCallStructure.getExpectedArrivalTime() != null) {
        monitoredCallStructure.setAimedArrivalTime(new Date(scheduledArrivalTime));
    }

    // siri extensions
    SiriExtensionWrapper wrapper = new SiriExtensionWrapper();
    ExtensionsStructure distancesExtensions = new ExtensionsStructure();
    SiriDistanceExtension distances = new SiriDistanceExtension();

    DecimalFormat df = new DecimalFormat();
    df.setMaximumFractionDigits(2);
    df.setGroupingUsed(false);

    distances.setStopsFromCall(index);
    distances.setCallDistanceAlongRoute(NumberUtils.toDouble(df.format(distanceOfCallAlongTrip)));
    distances.setDistanceFromCall(NumberUtils.toDouble(df.format(distanceOfVehicleFromCall)));
    distances.setPresentableDistance(presentationService.getPresentableDistance(distances));

    wrapper.setDistances(distances);
    distancesExtensions.setAny(wrapper);
    monitoredCallStructure.setExtensions(distancesExtensions);

    return monitoredCallStructure;
}

From source file:org.mitre.ccv.mapred.CalculateCosineDistanceMatrix.java

/**
 * Outputs the distance matrix (DenseVectors) in Phylip Square format. Names/labels are limited to 10-characters!
 *
 * @param jobConf//from  w  ww  .j  a v a 2s.  com
 * @param input             input directory name containing DenseVectors (as generated by this class).
 * @param output            output file name
 * @param fractionDigits    number of digits after decimal point
 * @throws IOException
 */
public static void printPhylipSquare(JobConf jobConf, String input, String output, int fractionDigits)
        throws IOException {
    JobConf conf = new JobConf(jobConf, CalculateCosineDistanceMatrix.class);

    DecimalFormat format = new DecimalFormat();
    format.setDecimalFormatSymbols(new DecimalFormatSymbols(Locale.US));
    format.setMinimumIntegerDigits(1);
    format.setMaximumFractionDigits(fractionDigits);
    //format.setMinimumFractionDigits(fractionDigits);
    format.setGroupingUsed(false);

    final Path inputPath = new Path(input);
    final FileSystem fs = inputPath.getFileSystem(conf);
    final Path qInputPath = fs.makeQualified(inputPath);
    final Path outputPath = new Path(output);
    Path[] paths = FileUtils.ls(conf, qInputPath.toString() + Path.SEPARATOR + "part-*");

    FSDataOutputStream fos = fs.create(outputPath, true); // throws nothing!
    Writer writer = new OutputStreamWriter(fos);
    Text key = new Text();
    DenseVectorWritable value = new DenseVectorWritable();
    Boolean wroteHeader = false;
    for (int idx = 0; idx < paths.length; idx++) {
        SequenceFile.Reader reader = new SequenceFile.Reader(fs, paths[idx], conf);
        boolean hasNext = reader.next(key, value);
        while (hasNext) {

            final DenseVector vector = value.get();
            if (!wroteHeader) {
                writer.write(String.format("\t%d\n", vector.getCardinality()));
                wroteHeader = true;
            }

            final StringBuilder sb = new StringBuilder();
            final String name = key.toString();
            sb.append(name.substring(0, (name.length() > 10 ? 10 : name.length())));
            final int padding = Math.max(1, 10 - name.length());
            for (int k = 0; k < padding; k++) {
                sb.append(' ');
            }
            sb.append(' ');
            for (int i = 0; i < vector.getCardinality(); i++) {
                final String s = format.format(vector.get(i)); // format the number
                sb.append(s);
                sb.append(' ');
            }
            sb.append("\n");
            writer.write(sb.toString());
            hasNext = reader.next(key, value);
        }
        try {
            writer.flush();
            reader.close();
        } catch (IOException ioe) {
            // closing the SequenceFile.Reader will throw an exception if the file is over some unknown size
            LOG.debug("Probably caused by closing the SequenceFile.Reader. All is well", ioe);
        }
    }
    try {
        writer.close();
        fos.flush();
        fos.close();
    } catch (IOException ioe) {
        LOG.debug("Caused by distributed cache output stream.", ioe);
    }
}