xyBar: The item label is not displayed in the PDF document when using JFreeChart versions 1.5.4, 1.5.5 and 1.5.6.

[AndrewZyablov-tech]

springBootVersion=3.5.3
jasperReportsVersion=7.0.3
jFreeChartVersion=1.5.6

After upgrading to the new version of JFreeChart =1.5.6, item labels disappeared.

The examine showed that when using JFreeChart versions from 1.5.0 to 1.5.3, the item labels are displayed correctly.

And when using versions of JFreeChart from 1.5.4 to 1.5.6, item labels disappeared.

!-- Created with Jaspersoft Studio version 7.0.1.final using JasperReports Library version 7.0.1-573496633c2b4074e32f433154b543003f7d2498 --
`

<element kind="chart" chartType="xyBar" uuid="48f3c001-176d-4047-b1d8-d704aa73d909" x="1" y="0" width="601" height="132" showLegend="false" evaluationTime="Report" linkType="None" linkTarget="Self" titleColor="#000000" titlePosition="Top">
	<titleFont fontSize="11.0"/>
	<legendFont/>
	<dataset kind="xy">
		<series>
			<seriesExpression><![CDATA["SERIES 1"]]></seriesExpression>
			<labelExpression><![CDATA["1"]]></labelExpression>
			<yvalueExpression><![CDATA[50]]></yvalueExpression>
			<xvalueExpression><![CDATA[1]]></xvalueExpression>
		</series>
		<series>
			<seriesExpression><![CDATA["SERIES 2"]]></seriesExpression>
			<labelExpression><![CDATA["2"]]></labelExpression>
			<autoSort>true</autoSort>
			<yvalueExpression><![CDATA[75]]></yvalueExpression>
			<xvalueExpression><![CDATA[2]]></xvalueExpression>
		</series>
		<series>
			<seriesExpression><![CDATA["SERIES 3"]]></seriesExpression>
			<labelExpression><![CDATA["3"]]></labelExpression>
			<autoSort>true</autoSort>
			<yvalueExpression><![CDATA[100]]></yvalueExpression>
			<xvalueExpression><![CDATA[2]]></xvalueExpression>
		</series>
	</dataset>
	<plot categoryAxisLabelColor="#000000" categoryAxisTickLabelColor="#000000" categoryAxisTickLabelMask="" categoryAxisVerticalTickLabels="false" categoryAxisLineColor="#FFFFFF" valueAxisLabelColor="#000000" valueAxisTickLabelColor="#000000" valueAxisVerticalTickLabels="false" valueAxisLineColor="#FFFFFF" showTickMarks="false" showTickLabels="false" showLabels="true">
		<categoryAxisLabelFont fontSize="10.0"/>
		<categoryAxisTickLabelFont fontSize="10.0"/>
		<itemLabel color="#000000" backgroundColor="#FFFFFF">
			<font fontSize="10.0" strikeThrough="false" italic="false" bold="false" underline="false"/>
		</itemLabel>
		<seriesColor order="0" color="#FFFFFF"/>
		<seriesColor order="1" color="#C0F9E9"/>
		<seriesColor order="2" color="#3BE9B9"/>
	</plot>
</element>

`

I examined the XYBarRenderer object, which returns JasperReports in two cases: JFreeChartVersion=1.5.3, where the item labels are displayed correctly:

and JFreeChartVersion=1.5.6, where they are missing:

At first glance, both versions have everything you need to display item labels. However, in the first case, the output is a correct PDF document, and in the second - without labels. Obviously, the XYBarRenderer objects are different for these versions. I can't figure out what is the reason for what is happening. I would like to know if I can fix this problem on my own.

[teodord]

Have you considered reporting this to the JFreeChart project?

[AndrewZyablov-tech]

The first thing I did was report about this to the JFreeChart project.
I didn't get any specific answers there.

[teodord]

I copied your JRXML snippet with the chart element and pasted it in the XYBarChartReport.jrxml which is part of the /demo/samples/charts sample inside the project.
I see the labels just fine, in PDF, when running the sample with:
mvn clean compile exec:exec@all

The master branch currently uses JFreeChart 1.5.4.

[teodord]

The issue is most likely caused by a change in JFreechart and there would be no easy way for us to have that addressed by the third-party, if ever.
If you are looking for a workaround, please try set the following configuration property to "svg":
https://jasperreports.sourceforge.net/config.reference.html#net.sf.jasperreports.chart.render.type

[AndrewZyablov-tech]

Thanks for the help! Explicitly specifying 'Renderer Type = svg' helped solve the problem. Previously, I always used the default value and there were no problems with JFreeChart.