Serialio
Class SerLooker

java.lang.Object
  Serialio.SerLooker

public class SerLooker

extends java.lang.Object

Looks for things to happen on the serial port object.

Copyright (c) 1997-2004 Serialio.com, All Rights Reserved.

Field Summary

protected SerialPort

sp

Constructor Summary

SerLooker()
Create a serial port 'looker'.

SerLooker(SerialPort sp)
Create a serial port 'looker'.

SerLooker(SerialPort sp, int bufSize)
Create a serial port 'looker' with a specific save data buffer.

Method Summary

void	abort() Aborts a waitFor operation in progress.
int	getAbortCheck() Deprecated. The method is no longer required
byte[]	getData() Returns the data received while the port was waiting for specific data.
byte[]	getDataItemSighted() Returns the data item that was sighted.
int	getNapTime() Get the sleep interval used when waiting for data
int	getRcvCount() Returns the number of bytes received while the port was waiting for specific data.
boolean	getSaveReset() Get the saveReset flag.
SerialPort	getSerialPort(SerialPort sp) Gets the serial port object
void	setAbortCheck(int per) Deprecated. The method is no longer required since the port timout (setTimeoutRx) value is always 0.
void	setNapTime(int napTime) Set the sleep interval used when waiting for data Note: SerialPort.setTimeoutRx is not used to allow quick aborts on some platforms (esp WinNT) where some threading behaviour is not well behaved.
void	setSaveData(int bufSize) Controls if the object saves data when waiting for a specific response.
void	setSaveDataBeforeMatch(boolean onOff) Sets the object to save data before the match.
void	setSaveReset(boolean onOff) Set the saveReset flag.
void	setSerialPort(SerialPort sp) Sets the serial port object
void	setShowBytesAsReceived(boolean onOff) Sets the object to show each byte to the console as received Setting this true can be handy for debugging & sanity checks.
boolean	waitFor(byte[] snd, byte[] rcv, int tmo) Send data (optional) and wait for a specific response.
boolean	waitFor(byte[] snd, int waitForCount, int tmo) Send data (optional) and wait for count bytes in the input queue.
boolean	waitFor(byte[] snd, java.util.Vector lookForList, int tmo) Send data (optional) and wait for any of a list of responses.
boolean	waitFor(java.lang.String Ssnd, java.lang.String Srcv, int tmo) Send data (optional) and wait for a specific response.
boolean	waitFor(java.lang.String Ssnd, java.util.Vector lookForList, int tmo) Send data (optional) and wait for any of a list of responses.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

sp

protected SerialPort sp

Constructor Detail

SerLooker

public SerLooker()

Create a serial port 'looker'. This empty constructor is for Bean friendlyness

SerLooker

public SerLooker(SerialPort sp)

Create a serial port 'looker'. Data received when looking for a response is discarded by default.

Parameters:

sp - a valid SerialPort object

SerLooker

public SerLooker(SerialPort sp,
                 int bufSize)

Create a serial port 'looker' with a specific save data buffer. If bufSize is greater than 0 then data received when looking for a response will be saved to the buffer.

Parameters:

sp - a valid SerialPort object

bufSize - size of buffer used when looking for desired data

Method Detail

waitFor

public boolean waitFor(byte[] snd,
                       int waitForCount,
                       int tmo)
                throws java.io.IOException

Send data (optional) and wait for count bytes in the input queue. Be sure no other threads access the port while this method runs.

Parameters:

snd - data to send (currently only UTF8 data is sent)

tmo - timeout in milliseconds if cnt bytes not available within tmo

Throws:

java.io.IOException - if error

waitFor

public boolean waitFor(java.lang.String Ssnd,
                       java.lang.String Srcv,
                       int tmo)
                throws java.io.IOException

Send data (optional) and wait for a specific response. Be sure no other threads access the port while this method runs. Transmit functions return after this amount of time if all data has not been sent.

Parameters:

tmo - timeout in milliseconds if Srcv string not found

Throws:

java.io.IOException - if error

waitFor

public boolean waitFor(byte[] snd,
                       byte[] rcv,
                       int tmo)
                throws java.io.IOException

Send data (optional) and wait for a specific response. Be sure no other threads access the port while this method runs. Transmit functions return after this amount of time if all data has not been sent.

Parameters:

tmo - timeout in milliseconds if Srcv string not found

Throws:

java.io.IOException - if error

waitFor

public boolean waitFor(java.lang.String Ssnd,
                       java.util.Vector lookForList,
                       int tmo)
                throws java.io.IOException

Send data (optional) and wait for any of a list of responses. Be sure no other threads access the port while this method runs.

Parameters:

Ssnd - string to send (currently only UTF8 data is sent)

tmo - timeout in milliseconds if none of the data patterns sighted

Throws:

java.io.IOException - if error

waitFor

public boolean waitFor(byte[] snd,
                       java.util.Vector lookForList,
                       int tmo)
                throws java.io.IOException

Send data (optional) and wait for any of a list of responses. Be sure no other threads access the port while this method runs.

Parameters:

snd - data to send (currently only UTF8 data is sent)

tmo - timeout in milliseconds if none of the data patterns sighted

Throws:

java.io.IOException - if error Note: on some platforms (e.g. WinNT 4) using waitFor when setTimeoutRx(n) where n is greater than 0, AND there is data in the input queue, can cause data in the queue to be lost due to OS driver issues.

setSaveData

public void setSaveData(int bufSize)

Controls if the object saves data when waiting for a specific response.

Parameters:

bufSize - Sets the size of the save buffer (0 turns saving off)

setNapTime

public void setNapTime(int napTime)

Set the sleep interval used when waiting for data Note: SerialPort.setTimeoutRx is not used to allow quick aborts on some platforms (esp WinNT) where some threading behaviour is not well behaved.

Parameters:

napTime - The time to sleep between checks for data

getNapTime

public int getNapTime()

Get the sleep interval used when waiting for data

getRcvCount

public int getRcvCount()

Returns the number of bytes received while the port was waiting for specific data. Note: this count is affected by setSaveReset()

abort

public void abort()

Aborts a waitFor operation in progress.

setSerialPort

public void setSerialPort(SerialPort sp)

Sets the serial port object

Parameters:

sp - a valid SerialPort object

getSerialPort

public SerialPort getSerialPort(SerialPort sp)

Gets the serial port object

setAbortCheck

public void setAbortCheck(int per)

Deprecated. The method is no longer required since the port timout (setTimeoutRx) value is always 0.

getAbortCheck

public int getAbortCheck()

Deprecated. The method is no longer required

setSaveReset

public void setSaveReset(boolean onOff)

Set the saveReset flag. When true(default) save buffer is reset on each call to waitFor. When false, save buffer continues from previous waitFor state, allowing history to be saved between waitFor calls.

Parameters:

onOff - State for save buffer reset

getSaveReset

public boolean getSaveReset()

Get the saveReset flag.

getDataItemSighted

public byte[] getDataItemSighted()

Returns the data item that was sighted. Used when searching for multiple data items.

setShowBytesAsReceived

public void setShowBytesAsReceived(boolean onOff)

Sets the object to show each byte to the console as received Setting this true can be handy for debugging & sanity checks.

setSaveDataBeforeMatch

public void setSaveDataBeforeMatch(boolean onOff)

Sets the object to save data before the match. Depending on speed of the data stream, data following the match may be discarded. i.e. since the read from the port is block-based, the match may come mid-block, and data in the same read block following the match would be discarded. In this mode data up to and including the match will be returned by getData. Normal operation for this object is to discard data up to the match (when there is a match) and data following the match will then be intact, and can be fetched with getData.

getData

public byte[] getData()

Returns the data received while the port was waiting for specific data. Note the ringBuf index is left pointing to the proper location to return the 'previous buffer full' of received data.