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 Details

    • 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 Details

    • DataChunk

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

  • Method Details

    • 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