How to change report locale on fly

Thank you for this explanation!

I was trying to set it up as you suggested - with a main raport and subraport. However when i run the main raport, i get the "resource not found" error.

The language resource is set up in both main raport and subraport. When i run only the subraport, it finds the language resources and works fine. When i run the main rapport, then the error occures. 

Would someone be so kind and help me figure out what i am doing wrong?

 

Here is the error:

net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.JRException: Resource not found at: Blank_A4_1.jasper.
	at com.jaspersoft.studio.editor.preview.view.control.ReportController.fillReport(ReportController.java:553)
	at com.jaspersoft.studio.editor.preview.view.control.ReportController.access$18(ReportController.java:528)
	at com.jaspersoft.studio.editor.preview.view.control.ReportController$1.run(ReportController.java:446)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: net.sf.jasperreports.engine.JRException: Resource not found at: Blank_A4_1.jasper.
	at net.sf.jasperreports.repo.RepositoryUtil.getResourceFromLocation(RepositoryUtil.java:158)
	at net.sf.jasperreports.repo.RepositoryUtil.getReport(RepositoryUtil.java:117)
	at net.sf.jasperreports.engine.fill.JRFillSubreport.loadReport(JRFillSubreport.java:477)
	at net.sf.jasperreports.engine.fill.JRFillSubreport.loadReportSource(JRFillSubreport.java:442)
	at net.sf.jasperreports.engine.fill.JRFillSubreport.getReportSource(JRFillSubreport.java:397)
	at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateReportSource(JRFillSubreport.java:365)
	at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:506)
	at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:357)
	at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:383)
	at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:548)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2613)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:836)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:275)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:119)
	at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:622)
	at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:135)
	at java.base/java.lang.Thread.run(Unknown Source)

 

Here is the script of the main rapport parent_language.jrxml.

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.20.0.final using JasperReports Library version 6.20.0-2bc7ab61c56f459e8176eb05c7705e145cd400ad  -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Blank_A4" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" resourceBundle="Vorlagen/languages" uuid="28040505-dc2b-435c-a00c-487edd066d98">
	<parameter name="language" class="java.lang.String"/>
	<queryString>
		<![CDATA[]]>
	</queryString>
	<detail>
		<band height="342">
			<subreport>
				<reportElement x="180" y="10" width="200" height="200" uuid="84a158cb-e021-428b-8380-00f140e36a50"/>
				<subreportParameter name="REPORT_LOCALE">
					<subreportParameterExpression><![CDATA[new java.util.Locale($P{language})]]></subreportParameterExpression>
				</subreportParameter>
				<subreportExpression><![CDATA["Blank_A4_1.jasper"]]></subreportExpression>
			</subreport>
		</band>
	</detail>
	<pageFooter>
		<band height="64">
			<textField>
				<reportElement x="384" y="34" width="100" height="30" uuid="1dd589ca-7390-4aac-8db0-68cd575b80da"/>
				<textFieldExpression><![CDATA[$P{language}]]></textFieldExpression>
			</textField>
		</band>
	</pageFooter>
</jasperReport>

 

Here is the code of subraport Blank_A4_1.jasper:

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.20.0.final using JasperReports Library version 6.20.0-2bc7ab61c56f459e8176eb05c7705e145cd400ad  -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Blank_A4_1" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" resourceBundle="Vorlagen/languages" isIgnorePagination="true" uuid="dd3470f4-32ab-40e4-b4a4-f1fa801f99b1">
	<queryString>
		<![CDATA[]]>
	</queryString>
	<background>
		<band splitType="Stretch"/>
	</background>
	<title>
		<band height="79" splitType="Stretch"/>
	</title>
	<pageHeader>
		<band height="35" splitType="Stretch"/>
	</pageHeader>
	<columnHeader>
		<band height="61" splitType="Stretch">
			<textField>
				<reportElement x="370" y="15" width="100" height="30" uuid="f7b3a783-c5fb-44c5-8729-aa49768a52d2"/>
				<textFieldExpression><![CDATA[$P{REPORT_LOCALE}]]></textFieldExpression>
			</textField>
		</band>
	</columnHeader>
	<detail>
		<band height="125" splitType="Stretch">
			<textField>
				<reportElement x="306" y="69" width="100" height="30" uuid="64cb4632-4d04-4244-a07b-14385501b5b8"/>
				<textFieldExpression><![CDATA[$R{Test}]]></textFieldExpression>
			</textField>
		</band>
	</detail>
	<columnFooter>
		<band height="45" splitType="Stretch"/>
	</columnFooter>
	<pageFooter>
		<band height="54" splitType="Stretch"/>
	</pageFooter>
	<summary>
		<band height="42" splitType="Stretch"/>
	</summary>
</jasperReport>