Hello,
Testing some nashorn scripts on java 9 I got some unexpected behavior.
The code:
import java.util.Arrays;
import java.util.List;
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
public class Main {
public static void main(String[] args) throws Exception{
ScriptEngine scriptEngine = new
ScriptEngineManager().getEngineByName("Nashorn");
scriptEngine.eval("var imports = new JavaImporter(java.lang.Integer, " +
"java.lang.Long);" +
"var fun1 = function(longs, ints, id) {" +
"with(imports) {" +
"print(id.getId().class);" +
"print(longs.contains(id.getId()));" +
"print(ints.contains(id.getId()));" +
"return Long.valueOf(1);" +
"}" +
"};");
Invocable invocable = (Invocable) scriptEngine;
List<Long> longs = Arrays.asList(1L, 2L);
List<Integer> ints = Arrays.asList(1, 2);
Teste teste = new Teste(1L);
Object result = invocable.invokeFunction("fun1", longs, ints, teste);
System.out.println(result.getClass());
}
}
public class Teste {
private Long id;
public Teste(Long id) {
this.id =id;
}
public Long getId() {
return id;
}
}
Executing the code
It produces:
Java 8.161
class java.lang.Long
true
false
class java.lang.Long
Java 9.0.4 and 10
class java.lang.Long
false
true
class java.lang.Integer
Nashorn is changing every number that fits a Integer in Integers, even if I
explicit define as Long.
This causes a problem on List.contains, because it receives a Object, if I
try to verify if a long exists in a list of longs, it returns false.
Is it a expected behavior ?
--
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