Custom Visualization Components Error When No Data

[StevenCrawford]

When my dataset returns no data, I'm getting a null pointer exception:

2017-09-07 08:09:13,807 ERROR AsyncJasperPrintAccessor,pool-6-thread-67:321 - Error during report executionjava.lang.NullPointerException        at com.jaspersoft.jasperreports.customvisualization.fill.CVFillComponent.evaluateComponent(CVFillComponent.java:171)        at com.jaspersoft.jasperreports.customvisualization.fill.CVFillComponent.evaluate(CVFillComponent.java:144)        at net.sf.jasperreports.engine.fill.JRFillComponentElement.evaluate(JRFillComponentElement.java:110)        at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:381)        at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:500)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2022)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:748)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:255)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:115)        at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:580)        at net.sf.jasperreports.parts.subreport.SubreportFillPart.fill(SubreportFillPart.java:177)        at net.sf.jasperreports.engine.part.FillPart.fill(FillPart.java:77)        at net.sf.jasperreports.engine.fill.PartReportFiller.fillPart(PartReportFiller.java:400)        at net.sf.jasperreports.engine.fill.PartReportFiller.fillParts(PartReportFiller.java:385)        at net.sf.jasperreports.engine.fill.PartReportFiller.fillDetail(PartReportFiller.java:337)        at net.sf.jasperreports.engine.fill.PartReportFiller.fillReport(PartReportFiller.java:280)        at net.sf.jasperreports.engine.fill.PartReportFiller.fill(PartReportFiller.java:214)        at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:123)        at com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$SynchronousExecutor.execute(EngineServiceImpl.java:924)        at net.sf.jasperreports.engine.fill.BaseFillHandle.startFill(BaseFillHandle.java:169)        at com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$AsynchronousReportFiller.fillReport(EngineServiceImpl.java:880)        at com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl.fillReport(EngineServiceImpl.java:1829)        at com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$ReportFill.runWithDataSource(EngineServiceImpl.java:1169)        at com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$ReportFill.runReport(EngineServiceImpl.java:1051)        at com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$ReportRunnable.run(EngineServiceImpl.java:946)        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)        at java.lang.Thread.run(Thread.java:745)

Side note: Can anyone point me to the source code for the CVC Components?