Example usage for org.apache.poi.util HexDump toHex

Introduction

In this page you can find the example usage for org.apache.poi.util HexDump toHex.

Prototype

public static String toHex(final byte[] value, final int bytesPerLine) 

Source Link

Document

Converts the parameter to a hex value breaking the results into lines.

Usage

From source file:org.openconcerto.erp.core.sales.pos.io.ConcertProtocol.java

License:Open Source License

public boolean sendPrototolE(int posIndex, int amountInCents, boolean requireResponse, char mode, char type,
        String currency, String string) throws Exception {
    boolean result = false;
    if (posIndex > 99 || posIndex < 0) {
        throw new IllegalArgumentException("Pos index must be between 0 and 99");
    }/*from  w  w  w  . ja v  a  2  s.c  o m*/
    if (amountInCents < 0) {
        throw new IllegalArgumentException("Amount must be positive");
    }
    if (currency.length() != 3) {
        throw new IllegalArgumentException("Bad currency code : " + currency);
    }

    final SerialPort serialPort = getSerialPort();
    final OutputStream out = serialPort.getOutputStream();
    final InputStream in = serialPort.getInputStream();

    out.write(ENQ);

    byte[] buffer = new byte[512];
    int nbRead = in.read(buffer);

    if (nbRead != 1 || buffer[0] != ACK) {
        String r = HexDump.toHex(buffer, nbRead);
        serialPort.close();
        throw new IllegalStateException("Bad response received : " + r);
    }
    //
    final ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    bOut.write(STX);
    // POS Index
    String n = rightAlign(posIndex, 2, '0');
    bOut.write(n.getBytes());
    // Amount in cents
    bOut.write(rightAlign(amountInCents, 8, '0').getBytes());
    if (requireResponse) {
        bOut.write('1');
    } else {
        bOut.write('0');
    }
    // Mode & type
    bOut.write(mode);
    bOut.write(type);
    // Currency
    bOut.write(currency.getBytes());
    // Text
    bOut.write(leftAlign(string, 10, ' ').getBytes());
    bOut.write(ETX);
    byte b = getLrc(bOut.toByteArray());
    bOut.write(b);
    out.write(bOut.toByteArray());

    // READ ACK
    nbRead = in.read(buffer);
    if (nbRead != 1 || buffer[0] != ACK) {
        String r = HexDump.toHex(buffer, nbRead);
        serialPort.close();
        throw new IllegalStateException("Bad response received : " + nbRead + ": " + r);
    }

    // END
    out.write(EOT);

    // Wait reply
    int count = 0;
    final int maxCount = 60 * 5;
    while (count < maxCount) {
        nbRead = in.read(buffer);
        if (nbRead > 0) {
            if (buffer[0] == ENQ) {
                out.write(ACK);
            } else if (buffer[0] == STX) {
                if (buffer[3] == '0') {
                    result = true;
                    out.write(ACK);
                    count = maxCount;
                } else if (buffer[3] == '7') {
                    out.write(NACK);
                    count = maxCount;
                }
            } else if (buffer[0] == EOT) {
                count = maxCount;
            }
        }
        Thread.sleep(200);
        count++;

    }

    out.close();
    in.close();
    serialPort.close();
    return result;
}

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