jasperreport groovy script if..else statement

[tong123123]

I try to use expression in a text field, and the language is set to groovy, what I input is a very simple if else statement

if ($P{P_TFE_TYPE} == null || $P{P_TFE_TYPE} == ""){   "abc"}else{   "def"}.[/code]

but this already throw exception as

net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
calculator_RPT0010_1542190583832_137322: 472: unexpected token: if @ line 472, column 22.
1 error
.
    at net.sf.jasperreports.compilers.JRGroovyCompiler.compileUnits(JRGroovyCompiler.java:109)
    at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:203)
    at net.sf.jasperreports.eclipse.builder.JasperReportCompiler.compileReport(JasperReportCompiler.java:286)
    at com.jaspersoft.studio.editor.preview.view.control.ReportController.compileJasperDesign(ReportController.java:481)
    at com.jaspersoft.studio.editor.preview.view.control.ReportController.access$8(ReportController.java:466)
    at com.jaspersoft.studio.editor.preview.view.control.ReportController$1.run(ReportController.java:369)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
calculator_RPT0010_1542190583832_137322: 472: unexpected token: if @ line 472, column 22.
1 error

    at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)
    at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:150)
    at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:120)
    at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:132)
    at org.codehaus.groovy.control.SourceUnit.addError(SourceUnit.java:360)
    at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:145)
    at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:111)
    at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:237)
    at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:167)
    at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:931)
    at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:593)
    at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:569)
    at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:546)
    at net.sf.jasperreports.compilers.JRGroovyCompiler.compileUnits(JRGroovyCompiler.java:102)
    ... 6 more

what is the problem?

I see a red underline under the opening {, and the tool tip is

missing EOF at '{'

if I use expression like

($P{P_TFE_TYPE} == null || $P{P_TFE_TYPE} == "")?"abc":"def"[/code]

it can compile, everything run as expected.

I know I can use ?: operator but don't want to as my if..else if condition is quite lengthy and complicated in reality, and feel hard to see if use tenary operator ?: