Using JSONata in Java throws exception

I am trying to use JSONata in java.

JSONata version - 1.4.0
Java Version - 1.8

Steps: Included Jsonata.js in the class path.

Invocation:

ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory.getEngineByName("JavaScript");
Invocable inv = (Invocable) engine;
FileReader jsonata = new FileReader("jsonata.js");
// load the JSONata processor
engine.eval(jsonata);

Reference link: How can I use JSONata in Java?

When I try to use this i get the below exception:

Caused by: jdk.nashorn.internal.runtime.ParserException: :1445:12 Expected ( but found function evaluate(expr, input, environment) {

at jdk.nashorn.internal.parser.AbstractParser.error(AbstractParser.java:294) at jdk.nashorn.internal.parser.AbstractParser.error(AbstractParser.java:279) at jdk.nashorn.internal.parser.AbstractParser.expectDontAdvance(AbstractParser.java:350) at jdk.nashorn.internal.parser.AbstractParser.expect(AbstractParser.java:337) at jdk.nashorn.internal.parser.Parser.functionExpression(Parser.java:2654) at jdk.nashorn.internal.parser.Parser.statement(Parser.java:875) at jdk.nashorn.internal.parser.Parser.sourceElements(Parser.java:773) at jdk.nashorn.internal.parser.Parser.functionBody(Parser.java:2901) at jdk.nashorn.internal.parser.Parser.functionExpression(Parser.java:2663) at jdk.nashorn.internal.parser.Parser.memberExpression(Parser.java:2506) at jdk.nashorn.internal.parser.Parser.leftHandSideExpression(Parser.java:2372) at jdk.nashorn.internal.parser.Parser.unaryExpression(Parser.java:3147) at jdk.nashorn.internal.parser.Parser.expression(Parser.java:3282) at jdk.nashorn.internal.parser.Parser.primaryExpression(Parser.java:1992) at jdk.nashorn.internal.parser.Parser.memberExpression(Parser.java:2511) at jdk.nashorn.internal.parser.Parser.leftHandSideExpression(Parser.java:2372) at jdk.nashorn.internal.parser.Parser.unaryExpression(Parser.java:3147) at jdk.nashorn.internal.parser.Parser.assignmentExpression(Parser.java:3353) at jdk.nashorn.internal.parser.Parser.variableStatement(Parser.java:1088) at jdk.nashorn.internal.parser.Parser.statement(Parser.java:884) at jdk.nashorn.internal.parser.Parser.sourceElements(Parser.java:773) at jdk.nashorn.internal.parser.Parser.program(Parser.java:709) at jdk.nashorn.internal.parser.Parser.parse(Parser.java:283) at jdk.nashorn.internal.parser.Parser.parse(Parser.java:249) at jdk.nashorn.internal.runtime.Context.compile(Context.java:1284) at jdk.nashorn.internal.runtime.Context.compileScript(Context.java:1251) at jdk.nashorn.internal.runtime.Context.compileScript(Context.java:627) at jdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:535) ... 6 moree

Any help on how to use it will be useful.

Solution

Since v1.2, jsonata.js uses ES6 features, so you'll need to make sure the version of Nashorn you are using supports this. Alternatively, you can use the jsonata-es5.js version that gets generated by Babel in the JSONata build. You can get this either by cloning the GitHub repo and running npm t, or by downloading it from here.