1 files changed, 262 insertions, 0 deletions
diff --git a/serial/serialjava.py b/serial/serialjava.py
new file mode 100644
index 0000000..46a78f8
--- /dev/null
+++ b/serial/serialjava.py
@@ -0,0 +1,262 @@
+#!jython
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# module for serial IO for Jython and JavaComm
+# see __init__.py
+#
+# (C) 2002-2008 Chris Liechti <cliechti@gmx.net>
+# this is distributed under a free software license, see license.txt
+
+from serial.serialutil import *
+
+def my_import(name):
+    mod = __import__(name)
+    components = name.split('.')
+    for comp in components[1:]:
+        mod = getattr(mod, comp)
+    return mod
+
+
+def detect_java_comm(names):
+    """try given list of modules and return that imports"""
+    for name in names:
+        try:
+            mod = my_import(name)
+            mod.SerialPort
+            return mod
+        except (ImportError, AttributeError):
+            pass
+    raise ImportError("No Java Communications API implementation found")
+
+
+# Java Communications API implementations
+# http://mho.republika.pl/java/comm/
+
+comm = detect_java_comm([
+    'javax.comm', # Sun/IBM
+    'gnu.io',     # RXTX
+])
+
+
+def device(portnumber):
+    """Turn a port number into a device name"""
+    enum = comm.CommPortIdentifier.getPortIdentifiers()
+    ports = []
+    while enum.hasMoreElements():
+        el = enum.nextElement()
+        if el.getPortType() == comm.CommPortIdentifier.PORT_SERIAL:
+            ports.append(el)
+    return ports[portnumber].getName()
+
+
+class JavaSerial(SerialBase):
+    """Serial port class, implemented with Java Communications API and
+       thus usable with jython and the appropriate java extension."""
+
+    def open(self):
+        """Open port with current settings. This may throw a SerialException
+           if the port cannot be opened."""
+        if self._port is None:
+            raise SerialException("Port must be configured before it can be used.")
+        if self._isOpen:
+            raise SerialException("Port is already open.")
+        if type(self._port) == type(''):      # strings are taken directly
+            portId = comm.CommPortIdentifier.getPortIdentifier(self._port)
+        else:
+            portId = comm.CommPortIdentifier.getPortIdentifier(device(self._port))     # numbers are transformed to a comport id obj
+        try:
+            self.sPort = portId.open("python serial module", 10)
+        except Exception, msg:
+            self.sPort = None
+            raise SerialException("Could not open port: %s" % msg)
+        self._reconfigurePort()
+        self._instream = self.sPort.getInputStream()
+        self._outstream = self.sPort.getOutputStream()
+        self._isOpen = True
+
+    def _reconfigurePort(self):
+        """Set communication parameters on opened port."""
+        if not self.sPort:
+            raise SerialException("Can only operate on a valid port handle")
+
+        self.sPort.enableReceiveTimeout(30)
+        if self._bytesize == FIVEBITS:
+            jdatabits = comm.SerialPort.DATABITS_5
+        elif self._bytesize == SIXBITS:
+            jdatabits = comm.SerialPort.DATABITS_6
+        elif self._bytesize == SEVENBITS:
+            jdatabits = comm.SerialPort.DATABITS_7
+        elif self._bytesize == EIGHTBITS:
+            jdatabits = comm.SerialPort.DATABITS_8
+        else:
+            raise ValueError("unsupported bytesize: %r" % self._bytesize)
+
+        if self._stopbits == STOPBITS_ONE:
+            jstopbits = comm.SerialPort.STOPBITS_1
+        elif stopbits == STOPBITS_ONE_POINT_FIVE:
+            self._jstopbits = comm.SerialPort.STOPBITS_1_5
+        elif self._stopbits == STOPBITS_TWO:
+            jstopbits = comm.SerialPort.STOPBITS_2
+        else:
+            raise ValueError("unsupported number of stopbits: %r" % self._stopbits)
+
+        if self._parity == PARITY_NONE:
+            jparity = comm.SerialPort.PARITY_NONE
+        elif self._parity == PARITY_EVEN:
+            jparity = comm.SerialPort.PARITY_EVEN
+        elif self._parity == PARITY_ODD:
+            jparity = comm.SerialPort.PARITY_ODD
+        elif self._parity == PARITY_MARK:
+            jparity = comm.SerialPort.PARITY_MARK
+        elif self._parity == PARITY_SPACE:
+            jparity = comm.SerialPort.PARITY_SPACE
+        else:
+            raise ValueError("unsupported parity type: %r" % self._parity)
+
+        jflowin = jflowout = 0
+        if self._rtscts:
+            jflowin  |=  comm.SerialPort.FLOWCONTROL_RTSCTS_IN
+            jflowout |=  comm.SerialPort.FLOWCONTROL_RTSCTS_OUT
+        if self._xonxoff:
+            jflowin  |=  comm.SerialPort.FLOWCONTROL_XONXOFF_IN
+            jflowout |=  comm.SerialPort.FLOWCONTROL_XONXOFF_OUT
+
+        self.sPort.setSerialPortParams(self._baudrate, jdatabits, jstopbits, jparity)
+        self.sPort.setFlowControlMode(jflowin | jflowout)
+
+        if self._timeout >= 0:
+            self.sPort.enableReceiveTimeout(self._timeout*1000)
+        else:
+            self.sPort.disableReceiveTimeout()
+
+    def close(self):
+        """Close port"""
+        if self._isOpen:
+            if self.sPort:
+                self._instream.close()
+                self._outstream.close()
+                self.sPort.close()
+                self.sPort = None
+            self._isOpen = False
+
+    def makeDeviceName(self, port):
+        return device(port)
+
+    #  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
+
+    def inWaiting(self):
+        """Return the number of characters currently in the input buffer."""
+        if not self.sPort: raise portNotOpenError
+        return self._instream.available()
+
+    def read(self, size=1):
+        """Read size bytes from the serial port. If a timeout is set it may
+           return less characters as requested. With no timeout it will block
+           until the requested number of bytes is read."""
+        if not self.sPort: raise portNotOpenError
+        read = bytearray()
+        if size > 0:
+            while len(read) < size:
+                x = self._instream.read()
+                if x == -1:
+                    if self.timeout >= 0:
+                        break
+                else:
+                    read.append(x)
+        return bytes(read)
+
+    def write(self, data):
+        """Output the given string over the serial port."""
+        if not self.sPort: raise portNotOpenError
+        if not isinstance(data, (bytes, bytearray)):
+            raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
+        self._outstream.write(data)
+        return len(data)
+
+    def flushInput(self):
+        """Clear input buffer, discarding all that is in the buffer."""
+        if not self.sPort: raise portNotOpenError
+        self._instream.skip(self._instream.available())
+
+    def flushOutput(self):
+        """Clear output buffer, aborting the current output and
+        discarding all that is in the buffer."""
+        if not self.sPort: raise portNotOpenError
+        self._outstream.flush()
+
+    def sendBreak(self, duration=0.25):
+        """Send break condition. Timed, returns to idle state after given duration."""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.sendBreak(duration*1000.0)
+
+    def setBreak(self, level=1):
+        """Set break: Controls TXD. When active, to transmitting is possible."""
+        if self.fd is None: raise portNotOpenError
+        raise SerialException("The setBreak function is not implemented in java.")
+
+    def setRTS(self, level=1):
+        """Set terminal status line: Request To Send"""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.setRTS(level)
+
+    def setDTR(self, level=1):
+        """Set terminal status line: Data Terminal Ready"""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.setDTR(level)
+
+    def getCTS(self):
+        """Read terminal status line: Clear To Send"""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.isCTS()
+
+    def getDSR(self):
+        """Read terminal status line: Data Set Ready"""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.isDSR()
+
+    def getRI(self):
+        """Read terminal status line: Ring Indicator"""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.isRI()
+
+    def getCD(self):
+        """Read terminal status line: Carrier Detect"""
+        if not self.sPort: raise portNotOpenError
+        self.sPort.isCD()
+
+
+# assemble Serial class with the platform specific implementation and the base
+# for file-like behavior. for Python 2.6 and newer, that provide the new I/O
+# library, derive from io.RawIOBase
+try:
+    import io
+except ImportError:
+    # classic version with our own file-like emulation
+    class Serial(JavaSerial, FileLike):
+        pass
+else:
+    # io library present
+    class Serial(JavaSerial, io.RawIOBase):
+        pass
+
+
+if __name__ == '__main__':
+    s = Serial(0,
+         baudrate=19200,        # baudrate
+         bytesize=EIGHTBITS,    # number of databits
+         parity=PARITY_EVEN,    # enable parity checking
+         stopbits=STOPBITS_ONE, # number of stopbits
+         timeout=3,             # set a timeout value, None for waiting forever
+         xonxoff=0,             # enable software flow control
+         rtscts=0,              # enable RTS/CTS flow control
+    )
+    s.setRTS(1)
+    s.setDTR(1)
+    s.flushInput()
+    s.flushOutput()
+    s.write('hello')
+    sys.stdio.write('%r\n' % s.read(5))
+    sys.stdio.write('%s\n' % s.inWaiting())
+    del s
+
+