Attachment 4657 Details for Bug 36733 – Uncompilable code

Uncompilable code

SimpleSerialJava.java (text/plain), 5.42 KB, created by Ert Dredge

on 2003-04-21 23:55:38 EDT

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Creator: Ert Dredge

Created: 2003-04-21 23:55:38 EDT

Size: 5.42 KB

patch

obsolete

>package ambient.simpleserial;
>
>import javax.comm.*;
>import java.io.*;
>
>/*
>
>Created January 5, 2001
>Modified on January 11, 2001 with better error reporting
>
>Implementation of SimpleSerial using the JavaComm package from Sun.
>
>*/
>
>public class SimpleSerialJava implements SimpleSerial {
>    DataInputStream     m_DIS = null;
>    DataOutputStream    m_DOS = null;
>    SerialPort          m_SerialPort = null;
>    boolean             m_BeenWarned = false;
>    int                 m_ComPortNum = -1;
>
>    // New a serial port.  Pass in comm port number
>    public SimpleSerialJava(int comPort) {
>        _initPort(comPort, 9600, 8, ONESTOPBIT, NOPARITY);
>    }
>    
>    // New a serial port.  Similar to above, but allows greater user configuration
>    public SimpleSerialJava(int comPort, int baud, int dataBits, int stopBits, int parity) {
>        _initPort(comPort, baud, dataBits, stopBits, parity);
>    }
>    
>    public void _initPort(int comPort, int baud, int dataBits, int stopBits, int parity) {
>
>        CommPortIdentifier  cpi = null;
>        CommPort            cp = null;
>
>        System.out.println("Initing JAVA port.  Com = " + comPort + ", baud = " + baud);                
>                
>        try {
>            cpi = CommPortIdentifier.getPortIdentifier("COM" + comPort);
>        }
>        catch (NoSuchPortException e) {
>            System.out.println("#### ERROR:  no such port: (" + comPort + ")");
>            return;
>        }
>        
>        try {
>            cp = cpi.open("SimpleSerial", 1000);
>        }
>        catch (PortInUseException e) {
>            System.out.println("Port in use");
>            return;
>        }
>        
>        if (cp instanceof SerialPort) {
>            m_SerialPort = (SerialPort)cp;
>            
>            try {
>                byte stopBitsLookup[] = {1, 3, 2};
>
>                m_SerialPort.setSerialPortParams(baud, dataBits, stopBitsLookup[stopBits], parity);
>                m_SerialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
>            }
>            catch (UnsupportedCommOperationException e) {
>                System.out.println("#### ERROR:  Unsupported comm operation exception");
>                return;
>            }
>                                    
>            try {
>                m_DIS = new DataInputStream(m_SerialPort.getInputStream());
>                m_DOS = new DataOutputStream(m_SerialPort.getOutputStream());
>                
>                // if we've made it this far, we have serial port
>                m_ComPortNum = comPort;
>            }
>            catch (IOException e) {
>                System.out.println("### ERROR:  Could't open data stream");
>                m_DIS = null;
>                m_DOS = null;
>            }
>        }
>    }
>    
>    public void close() {
>        if (m_SerialPort != null) {
>            m_SerialPort.close();
>        }
>        m_SerialPort = null;
>    }
>
>    public boolean writeByte(byte byteVal) {
>        try {
>            m_DOS.writeByte(byteVal);
>            return true;
>        }
>        catch (IOException e) {
>            System.out.println("### IO ERROR WRITING BYTE");
>            System.out.println("### error is:  " + e);
>            return false;
>        }
>    }
>    
>    public int readByte() {
>        try {
>            return m_DIS.readByte();
>        }
>        catch (IOException e) {           
>            System.out.println("### IO ERROR READING BYTE");
>            System.out.println("### error is:  " + e);
>            return 0;
>        }        
>    }
> 
>    public int getComPortNum() {
>        return m_ComPortNum;
>    }
>            
>    public OutputStream getOutputStream() {
>        return m_DOS;
>    }
>    
>    public InputStream getInputStream() {
>        return m_DIS;
>    }
>    
>    public boolean isValid() {
>        return (m_DOS != null && m_DIS != null);
>    }
>    
>    public int available() {
>        try {
>            return m_DIS.available();
>        }
>        catch (IOException e) {
>            System.out.println("### ERROR:  Got IOException in avaialable");
>            m_DIS = null;
>            return -1;
>        }
>    }
>    
>    public byte[] readBytes() {
>        try {
>            int available = m_DIS.available();
>            if (available > 0) {            
>                byte        data[] = new byte[available];
>                
>                m_DIS.read(data);
>                return data;
>            }
>            return new byte[0];
>        }
>        catch (IOException e) {
>            System.out.println("### IO ERROR reading multiple bytes");
>            System.out.println("### Error is:  " + e);
>            
>            return new byte[0];
>        }        
>    }    
>    
>    public String readString() {        
>        int     ii;
>        
>        byte data[] = readBytes();
>        
>        if (!m_BeenWarned) {
>            for (ii = 0; ii < data.length; ii++) {
>                if (!m_BeenWarned && data[ii] < 0) {
>                    m_BeenWarned = true;
>                    System.out.println("--> #### WARNING:  You are reading string data with values less than zero.");
>                    System.out.println("--> #### This can be dangerous as Char->Byte remapping can change negative values!");
>                    System.out.println("--> #### It's MUCH safer to use readBytes[] instead");
>                    System.out.println("--> #### You will only receive this warning ONCE");
>                    System.out.println("--> ####");
>                }
>            }
>        }
>        
>        return new String(data);
>    }    
>}

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Attachments on bug 36733: 4656 | 4657