se.hendeby.sensordata

Class FileSensorDataReader

java.lang.Object

se.hendeby.sensordata.SensorDataReader

se.hendeby.sensordata.FileSensorDataReader

public class FileSensorDataReader
extends SensorDataReader

Class used to read measurement data from log files This class is responsible for read measurement information from log files created by the Sensor Fusion Android app. This is a specialization of the SensorDataReader class.

Constructor Summary

Constructors

Constructor and Description
FileSensorDataReader(java.lang.String fname) Constructor.

Method Summary

Modifier and Type	Method and Description
protected double[]	get(long maxDiff) Get a set of data with matching time stamp from the log file.
double[][]	getAllCellRss()
double[][]	getAllWifiRss()
java.lang.String	getBssidId(int id)
java.lang.String	getCellId(int id)
SensorData	getSensorData() Extract the next received SensorData object Extracts a SensorData object from the receiver queue.
java.lang.String	getSsidId(int id)
void	reset() Reset the reading of the log file.
void	start() Start reading the log file.
boolean	status() Status of the log file reader.
void	stop() Stop reading the file.

Methods inherited from class se.hendeby.sensordata.SensorDataReader

finalize, getAll, getNext

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSensorDataReader

public FileSensorDataReader(java.lang.String fname)
                     throws java.io.IOException

Constructor. Construct the object given the name of the file to be used as log file.

Parameters:

fname - The path of the log file.

Throws:

java.io.IOException - Throws an exception on failure to open and read the log file.

Method Detail

start

public void start()
           throws java.io.IOException

Start reading the log file.

Specified by:

start in class SensorDataReader

Throws:

java.io.IOException - If an I/O error is encountered an exception is thrown.

stop

public void stop()
          throws java.io.IOException

Stop reading the file. In this process the log file is closed.

Specified by:

stop in class SensorDataReader

Throws:

java.io.IOException - If an I/O error is encountered and exception is thrown.

get

protected double[] get(long maxDiff)

Get a set of data with matching time stamp from the log file. Reads the next available SensorData objects and return the measurements less than maxDiff milliseconds apart in a double vector, where the index in the vector is given by the SensorDatas offset value.

Specified by:

get in class SensorDataReader

Parameters:

maxDiff - Milliseconds between measurements to be considered from the same sample time.

Returns:

A double array containing the measurements from the next available timestamp

getSensorData

public SensorData getSensorData()

Description copied from class: SensorDataReader

Extract the next received SensorData object Extracts a SensorData object from the receiver queue.

Specified by:

getSensorData in class SensorDataReader

Returns:

A SensorData object of null if there is no more queued objects.

reset

public void reset()

Reset the reading of the log file. In doing so the log file is first closed and opened again.

Specified by:

reset in class SensorDataReader

status

public boolean status()

Status of the log file reader.

Specified by:

status in class SensorDataReader

Returns:

Return true if the file can be read from.

getCellId

public java.lang.String getCellId(int id)

getAllCellRss

public double[][] getAllCellRss()

getBssidId

public java.lang.String getBssidId(int id)

getSsidId

public java.lang.String getSsidId(int id)

getAllWifiRss

public double[][] getAllWifiRss()