PlugwiseCommunicationContext.java 文件源码

@SuppressWarnings("unchecked")
private CommPortIdentifier findSerialPortIdentifier() throws PlugwiseInitializationException {
    Enumeration<CommPortIdentifier> portList = CommPortIdentifier.getPortIdentifiers();
    while (portList.hasMoreElements()) {
        CommPortIdentifier identifier = portList.nextElement();
        if (identifier.getPortType() == CommPortIdentifier.PORT_SERIAL
                && identifier.getName().equals(configuration.getSerialPort())) {
            logger.debug("Serial port '{}' has been found", configuration.getSerialPort());
            return identifier;
        }
    }

    // Build exception message when port not found
    StringBuilder sb = new StringBuilder();
    portList = CommPortIdentifier.getPortIdentifiers();
    while (portList.hasMoreElements()) {
        CommPortIdentifier id = portList.nextElement();
        if (id.getPortType() == CommPortIdentifier.PORT_SERIAL) {
            sb.append(String.format("%s%n", id.getName()));
        }
    }
    throw new PlugwiseInitializationException(String.format(
            "Serial port '%s' could not be found. Available ports are:%n%s", configuration.getSerialPort(), sb));
}