Example usage for java.nio ByteBuffer position

Introduction

In this page you can find the example usage for java.nio ByteBuffer position.

Prototype

public final int position()

Source Link

Document

Returns the position of this buffer.

Usage

From source file:edu.hawaii.soest.kilonalu.dvp2.DavisWxParser.java

public static void main(String[] args) {

    // Ensure we have a path to the binary file
    if (args.length != 1) {
        logger.info("Please provide the path to a file containing a binary LOOP packet.");
        System.exit(1);//from  w w  w  .  j  a v  a 2s .  c  o m
    } else {
        try {
            // open and read the file
            File packetFile = new File(args[0]);
            FileInputStream fis = new FileInputStream(packetFile);
            FileChannel fileChannel = fis.getChannel();
            ByteBuffer inBuffer = ByteBuffer.allocateDirect(8192);
            ByteBuffer packetBuffer = ByteBuffer.allocateDirect(8192);

            while (fileChannel.read(inBuffer) != -1 || inBuffer.position() > 0) {
                inBuffer.flip();
                packetBuffer.put(inBuffer.get());
                inBuffer.compact();
            }
            fileChannel.close();
            fis.close();
            packetBuffer.put(inBuffer.get());

            // create an instance of the parser, and report the field contents after parsing
            DavisWxParser davisWxParser = new DavisWxParser(packetBuffer);

            // Set up a simple logger that logs to the console
            PropertyConfigurator.configure(davisWxParser.getLogConfigurationFile());

            logger.info("loopID:                         " + davisWxParser.getLoopID());
            logger.info("barTrend:                       " + davisWxParser.getBarTrend());
            logger.info("barTrendAsString:               " + davisWxParser.getBarTrendAsString());
            logger.info("packetType:                     " + davisWxParser.getPacketType());
            logger.info("nextRecord:                     " + davisWxParser.getNextRecord());
            logger.info("barometer:                      " + davisWxParser.getBarometer());
            logger.info("insideTemperature:              " + davisWxParser.getInsideTemperature());
            logger.info("insideHumidity:                 " + davisWxParser.getInsideHumidity());
            logger.info("outsideTemperature:             " + davisWxParser.getOutsideTemperature());
            logger.info("windSpeed:                      " + davisWxParser.getWindSpeed());
            logger.info("tenMinuteAverageWindSpeed:      " + davisWxParser.getTenMinuteAverageWindSpeed());
            logger.info("windDirection:                  " + davisWxParser.getWindDirection());
            logger.info(
                    "extraTemperatures:              " + Arrays.toString(davisWxParser.getExtraTemperatures()));
            logger.info(
                    "soilTemperatures:               " + Arrays.toString(davisWxParser.getSoilTemperatures()));
            logger.info(
                    "leafTemperatures:               " + Arrays.toString(davisWxParser.getLeafTemperatures()));
            logger.info("outsideHumidity:                " + davisWxParser.getOutsideHumidity());
            logger.info(
                    "extraHumidities:                " + Arrays.toString(davisWxParser.getExtraHumidities()));
            logger.info("rainRate:                       " + davisWxParser.getRainRate());
            logger.info("uvRadiation:                    " + davisWxParser.getUvRadiation());
            logger.info("solarRadiation:                 " + davisWxParser.getSolarRadiation());
            logger.info("stormRain:                      " + davisWxParser.getStormRain());
            logger.info("currentStormStartDate:          " + davisWxParser.getCurrentStormStartDate());
            logger.info("dailyRain:                      " + davisWxParser.getDailyRain());
            logger.info("monthlyRain:                    " + davisWxParser.getMonthlyRain());
            logger.info("yearlyRain:                     " + davisWxParser.getYearlyRain());
            logger.info("dailyEvapoTranspiration:        " + davisWxParser.getDailyEvapoTranspiration());
            logger.info("monthlyEvapoTranspiration:      " + davisWxParser.getMonthlyEvapoTranspiration());
            logger.info("yearlyEvapoTranspiration:       " + davisWxParser.getYearlyEvapoTranspiration());
            logger.info("soilMoistures:                  " + Arrays.toString(davisWxParser.getSoilMoistures()));
            logger.info("leafWetnesses:                  " + Arrays.toString(davisWxParser.getLeafWetnesses()));
            logger.info("insideAlarm:                    " + davisWxParser.getInsideAlarm());
            logger.info("rainAlarm:                      " + davisWxParser.getRainAlarm());
            logger.info("outsideAlarms:                  " + davisWxParser.getOutsideAlarms());
            logger.info("extraTemperatureHumidityAlarms: " + davisWxParser.getExtraTemperatureHumidityAlarms());
            logger.info("soilLeafAlarms:                 " + davisWxParser.getSoilLeafAlarms());
            logger.info("transmitterBatteryStatus:       " + davisWxParser.getTransmitterBatteryStatus());
            logger.info("consoleBatteryVoltage:          " + davisWxParser.getConsoleBatteryVoltage());
            logger.info("forecastIconValues:             " + davisWxParser.getForecastAsString());
            logger.info("forecastRuleNumber:             " + davisWxParser.getForecastRuleNumberAsString());
            logger.info("timeOfSunrise:                  " + davisWxParser.getTimeOfSunrise());
            logger.info("timeOfSunset:                   " + davisWxParser.getTimeOfSunset());
            logger.info("recordDelimiter:                " + davisWxParser.getRecordDelimiterAsHexString());
            logger.info("crcChecksum:                    " + davisWxParser.getCrcChecksum());

        } catch (java.io.FileNotFoundException fnfe) {
            fnfe.printStackTrace();

        } catch (java.io.IOException ioe) {
            ioe.printStackTrace();

        }

    }
}

From source file:Main.java

public static void printBufferInfo(ByteBuffer bb) {
    int limit = bb.limit();
    System.out.println("Position =  " + bb.position() + ", Limit   = " + limit);
    for (int i = 0; i < limit; i++) {
        System.out.print(bb.get(i) + "  ");
    }/*from w w  w.ja  v  a  2 s .  c  o m*/
    System.out.println();
}

From source file:Main.java

public static int positionP(ByteBuffer bb, int relPos) {
    return bb.position(bb.position() + relPos).position();
}

From source file:Main.java

/**
 * position is 0 and limit = capacity.// w ww.java 2 s  .  c o m
 * 
 * @param bb
 * @return
 */
public final static boolean isEmpty(final ByteBuffer bb) {
    return (bb.position() == 0 && bb.limit() == bb.capacity()) || bb.limit() == 0;
}

From source file:Main.java

public final static byte[] toBytesP(final ByteBuffer bb) {
    return toBytes(bb, bb.position(), bb.remaining());
}

From source file:Main.java

public static ByteBuffer copy(ByteBuffer buffer) {

    final int length = buffer.limit() - buffer.position();
    final ByteOrder o = buffer.order();
    final ByteBuffer r = ByteBuffer.allocate(length);
    r.order(o);//from  ww  w  .j  a v a2s  . c om

    r.put(buffer);
    r.clear(); // Reset position and limit after the put()

    return r;

}

From source file:Main.java

public static int writeVLong(ByteBuffer bb, long l) {
    int initPos = bb.position();
    if (l >= -112 && l <= 127) {
        bb.put((byte) l);
        return 1;
    }/*from  ww w . j  ava  2 s .  c o m*/

    int len = -112;
    if (l < 0) {
        l ^= -1L; // take one's complement'
        len = -120;
    }

    long tmp = l;
    while (tmp != 0) {
        tmp = tmp >> 8;
        len--;
    }

    bb.put((byte) len);

    len = (len < -120) ? -(len + 120) : -(len + 112);

    for (int idx = len; idx != 0; idx--) {
        int shiftbits = (idx - 1) * 8;
        long mask = 0xFFL << shiftbits;
        bb.put((byte) ((l & mask) >> shiftbits));
    }
    return bb.position() - initPos;
}

From source file:Main.java

public final static byte[] toBytesP(final ByteBuffer bb, int len) {
    return toBytes(bb, bb.position(), len);
}

From source file:Main.java

public static boolean wrapsFullArray(ByteBuffer byteBuffer) {
    return byteBuffer.hasArray() && byteBuffer.position() == 0 && byteBuffer.arrayOffset() == 0
            && byteBuffer.remaining() == byteBuffer.capacity();
}

From source file:Main.java

public final static int copyP(final ByteBuffer from, final ByteBuffer to) {
    final int offset1 = from.position();
    final int offset2 = to.position();
    final int len = from.limit() - offset1;
    return copy(from, offset1, to, offset2, len);
}