Class FloatArrayLogEntry

java.lang.Object

org.wpilib.datalog.DataLogEntry

org.wpilib.datalog.FloatArrayLogEntry

public class FloatArrayLogEntry
extends DataLogEntry

Log array of float values.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DATA_TYPE	The data type for float array values.

Fields inherited from class DataLogEntry

m_entry, m_log

Constructor Summary

Constructors

Constructor	Description
FloatArrayLogEntry(DataLog log, String name)	Constructs a float array log entry.
FloatArrayLogEntry(DataLog log, String name, long timestamp)	Constructs a float array log entry.
FloatArrayLogEntry(DataLog log, String name, String metadata)	Constructs a float array log entry.
FloatArrayLogEntry(DataLog log, String name, String metadata, long timestamp)	Constructs a float array log entry.

Method Summary

Modifier and Type	Method	Description
void	append(float[] value)	Appends a record to the log.
void	append(float[] value, long timestamp)	Appends a record to the log.
float[]	getLastValue()	Gets the last value.
boolean	hasLastValue()	Gets whether there is a last value.
void	update(float[] value)	Updates the last value and appends a record to the log if it has changed.
void	update(float[] value, long timestamp)	Updates the last value and appends a record to the log if it has changed.

Methods inherited from class DataLogEntry

finish, finish, setMetadata, setMetadata

Methods inherited from class Object

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

Field Details

DATA_TYPE

public static final String DATA_TYPE

The data type for float array values.

See Also:

• Constant Field Values

Constructor Details

FloatArrayLogEntry

public FloatArrayLogEntry(DataLog log,
 String name,
 String metadata,
 long timestamp)

Constructs a float array log entry.

Parameters:

log - datalog

name - name of the entry

metadata - metadata

timestamp - entry creation timestamp in nanoseconds (0=now)

FloatArrayLogEntry

public FloatArrayLogEntry(DataLog log,
 String name,
 String metadata)

Constructs a float array log entry.

Parameters:

log - datalog

name - name of the entry

metadata - metadata

FloatArrayLogEntry

public FloatArrayLogEntry(DataLog log,
 String name,
 long timestamp)

Constructs a float array log entry.

Parameters:

log - datalog

name - name of the entry

timestamp - entry creation timestamp in nanoseconds (0=now)

FloatArrayLogEntry

public FloatArrayLogEntry(DataLog log,
 String name)

Constructs a float array log entry.

Parameters:

log - datalog

name - name of the entry

Method Details

append

public void append(float[] value,
 long timestamp)

Appends a record to the log.

Parameters:

value - Value to record

timestamp - Time stamp in nanoseconds (0 to indicate now)

append

public void append(float[] value)

Appends a record to the log.

Parameters:

value - Value to record

update

public void update(float[] value,
 long timestamp)

Updates the last value and appends a record to the log if it has changed.

Note: the last value is local to this class instance; using update() with two instances pointing to the same underlying log entry name will likely result in unexpected results.

Parameters:

value - Value to record

timestamp - Time stamp in nanoseconds (0 to indicate now)

update

public void update(float[] value)

Updates the last value and appends a record to the log if it has changed.

Note: the last value is local to this class instance; using update() with two instances pointing to the same underlying log entry name will likely result in unexpected results.

Parameters:

value - Value to record

hasLastValue

public boolean hasLastValue()

Gets whether there is a last value.

Note: the last value is local to this class instance and updated only with update(), not append().

Returns:

True if last value exists, false otherwise.

getLastValue

public float[] getLastValue()

Gets the last value.

Note: the last value is local to this class instance and updated only with update(), not append().

Returns:

Last value, or false if none.