Package com.atlassian.jira.charts.jfreechart

Class ChartHelper

java.lang.Object

com.atlassian.jira.charts.jfreechart.ChartHelper

public class ChartHelper
extends Object

A nice utility class to manage the generation of a charts.

The original implementation use jfreechart's one time image mechanism which can lead to JRA-21854.

New implementation is using data uri mechanism (inlining base64 encoded images directly) so the generate(int, int) and getLocation() methods are here just for backward compatibility.

When you are going to create new kind of chart you should use generateInline(int, int) instead of generate(int, int)

Since:

v4.0

See Also:

• ChartUtils

Constructor Summary

Constructors

Constructor	Description
ChartHelper(org.jfree.chart.JFreeChart chart)
ChartHelper(org.jfree.chart.JFreeChart chart, TempFileFactory tempFileFactory, ChartUtils chartUtils)

Method Summary

Modifier and Type	Method	Description
void	generate(int width, int height)	Deprecated. JRA-21854 images should be rendered using data uri.
void	generateInline(int width, int height)	Generates chart "into the memory" which can be later retrieved via getImage() method.
org.jfree.chart.JFreeChart	getChart()
BufferedImage	getImage()	Retrieve image that has been generated with generateInline(int, int)
String	getImageMap()	Deprecated. Use #getImageMapHtml
String	getImageMapHtml()
String	getImageMapName()
String	getLocation()	Deprecated. use inline charts
org.jfree.chart.ChartRenderingInfo	getRenderingInfo()

Methods inherited from class java.lang.Object

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

Constructor Details

ChartHelper

public ChartHelper(org.jfree.chart.JFreeChart chart)

ChartHelper

@Internal
public ChartHelper(org.jfree.chart.JFreeChart chart,
 TempFileFactory tempFileFactory,
 ChartUtils chartUtils)

Method Details

getChart

public org.jfree.chart.JFreeChart getChart()

generateInline

public void generateInline(int width,
 int height)
                    throws IOException

Generates chart "into the memory" which can be later retrieved via getImage() method.

Throws:

IOException

generate

@Deprecated
public void generate(int width,
 int height)
              throws IOException

Deprecated.

JRA-21854 images should be rendered using data uri. Please use generateInline(int, int)

Throws:

IOException

See Also:

• getImage()

getRenderingInfo

public org.jfree.chart.ChartRenderingInfo getRenderingInfo()

getLocation

@Deprecated
public String getLocation()

Deprecated.

use inline charts

See Also:

• getImage()
• ChartUtils

getImageMap

public String getImageMap()

Deprecated.

Use #getImageMapHtml

getImageMapHtml

public String getImageMapHtml()

Since:

v6.0

getImageMapName

public String getImageMapName()

getImage

public BufferedImage getImage()

Retrieve image that has been generated with generateInline(int, int)

Returns:

generated image or null if the generateInline(int, int) method has not been used.