[graalvm-users] TypeError

[Andreas Mueller]

Hi,

I’m testing existing Nashorn JS scripts running on GraalVM 20.0.0. I’m getting this exception while instantiating a java.lang.Long object from JS code:

TypeError: instantiate on JavaClass[java.lang.Long] failed due to: Multiple applicable overloads found for method name java.lang.Long (candidates: [Method[public java.lang.Long(java.lang.String) throws java.lang.NumberFormatException], Method[public java.lang.Long(long)]], arguments: [1585059851090 (String)])

The argument I pass is a String and there is a Long constructor for this so I don’t understand why this is thrown.

My ScriptEngine with a mapping String -> long is created as follows:

public class GraalSetup {
    private static HostAccess getHostAccess() {
        HostAccess.Builder builder = HostAccess.newBuilder(HostAccess.ALL);
        builder.targetTypeMapping(String.class, Integer.class, null, (v) -> Integer.parseInt(v));
        builder.targetTypeMapping(String.class, Long.class, null, (v) -> Long.parseLong(v));
        builder.targetTypeMapping(String.class, Double.class, null, (v) -> Double.parseDouble(v));
        builder.targetTypeMapping(String.class, Float.class, null, (v) -> Float.parseFloat(v));
        builder.targetTypeMapping(Integer.class, Long.class, null, (v) -> v.longValue());
        return builder.build();
    }

    public static ScriptEngine engine() throws Exception {
        return GraalJSScriptEngine.create(null,Context.newBuilder("js").allowAllAccess(true).allowHostAccess(getHostAccess()));
    }
}

Any hints?

Thanks,
Andreas
-- 
Andreas Mueller
IIT Software GmbH
https://urldefense.com/v3/__http://www.swiftmq.com__;!!GqivPVa7Brio!JAZvy2BRpAt-fq5yTxPdkUbWUdQVGjXcIoEDS73fT4aCdVTUJNELDxHlzbNjh9yULvkOsA$  <https://urldefense.com/v3/__http://www.swiftmq.com__;!!GqivPVa7Brio!JAZvy2BRpAt-fq5yTxPdkUbWUdQVGjXcIoEDS73fT4aCdVTUJNELDxHlzbNjh9yULvkOsA$ > 


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