org.opennms.netmgt.rrd
Interface RrdGraphDetails

All Known Implementing Classes:

DefaultRrdGraphDetails

public interface RrdGraphDetails

Container for details from an RRD graph. Stores the graph image (if any) and details relating to the graph.

Author:

DJ Gregor

Method Summary

int	getHeight() Gets the height of the PNG image.
InputStream	getInputStream() Gets the PNG image representing the graph.
String[]	getPrintLines() Gets the PRINT lines associated with the graph command.
int	getWidth() Gets the width of the PNG image.

Method Detail

getInputStream

InputStream getInputStream()
                           throws RrdException

Gets the PNG image representing the graph. If a graph wasn't created, an RrdException will be thrown.

Returns:

InputStream containg a PNG image representing the graph

Throws:

RrdException - if there is an error getting an input stream for the graph, such as if no graph image was created

getPrintLines

String[] getPrintLines()
                       throws RrdException

Gets the PRINT lines associated with the graph command.

Returns:

PRINT lines associated with the graph command. If there were no PRINT lines, an empty array is returned.

Throws:

RrdException - if there is an error getting the PRINT lines

getHeight

int getHeight()
              throws RrdException

Gets the height of the PNG image.

Returns:

height of the PNG image in pixels. This is the height of the entire PNG image, not just the height of the graph box within the image.

Throws:

RrdException - if no graph image was produced or if there is an error getting the height

getWidth

int getWidth()
             throws RrdException

Gets the width of the PNG image.

Returns:

width of the PNG image in pixels. This is the width of the entire PNG image, not just the width of the graph box within the image.

Throws:

RrdException - if no graph image was produced or if there is an error getting the height