Package org.rrd4j.core.jrrd

Class DataChunk

java.lang.Object

org.rrd4j.core.jrrd.DataChunk

public class DataChunk
extends Object

Models a chunk of result data from an RRDatabase.

Version:

$Revision: 1.1 $

Author:

Ciaran Treanor

Field Summary

Fields

Modifier and Type	Field	Description
(package private) double[][]	data
(package private) int	dsCount	Number of datasources must be equal to number of datasources in file
(package private) int	endOffset	Row number offset relative to current row
(package private) int	startOffset	Row number offset relative to current row.

Constructor Summary

Constructors

Constructor	Description
DataChunk(Map<String,Integer> nameindex, long startTime, int startOffset, int endOffset, long step, int dsCount, int rows)

Method Summary

Modifier and Type	Method	Description
double[][]	getData()	Getter for the field data.
int	getDsCount()
int	getEnd()
int	getStart()
long	getStep()
long[]	getTimestamps()	Getter for the time stamps values.
Plottable	toPlottable(String name)	Extract a datasource from the datachunck given is name as a Plottable
String	toString()	Returns a summary of the contents of this data chunk.

Methods inherited from class java.lang.Object

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

Field Detail

startOffset

final int startOffset

Row number offset relative to current row. Can be negative

endOffset

final int endOffset

Row number offset relative to current row

dsCount

final int dsCount

Number of datasources must be equal to number of datasources in file

data

final double[][] data

Constructor Detail

DataChunk

DataChunk(Map<String,Integer> nameindex,
          long startTime,
          int startOffset,
          int endOffset,
          long step,
          int dsCount,
          int rows)

Method Detail

toString

public String toString()

Returns a summary of the contents of this data chunk. The first column is the time (RRD format) and the following columns are the data source values.

Overrides:

toString in class Object

Returns:

a summary of the contents of this data chunk.

getStart

public int getStart()

getEnd

public int getEnd()

getStep

public long getStep()

getDsCount

public int getDsCount()

getData

public double[][] getData()

Getter for the field data.

Returns:

the data

getTimestamps

public long[] getTimestamps()

Getter for the time stamps values.

Returns:

array of time stamps in seconds

toPlottable

public Plottable toPlottable(String name)

Extract a datasource from the datachunck given is name as a Plottable

Parameters:

name - the datasource name

Returns:

a plottable for the datasource