Re: raise ecmascript error from JSObject

[Sundararajan Athijegannathan]

Hope the following sample code helps you...

-Sundar
import javax.script.*;
import jdk.nashorn.api.scripting.*;

public class Main {
  private static JSObject errorCtr;

  public static void main(String[] args) throws Exception {
     ScriptEngine e = new ScriptEngineManager().getEngineByName("nashorn");
     // save JS Error constructor which is used later to construct 
Error object
     errorCtr = (JSObject)e.eval("Error");
     e.put("func", new MyFunc());
     e.eval("try { func() } catch(e) { print(e); print(e.stack); } ");
  }

  public static class MyFunc extends AbstractJSObject {
      public boolean isFunction() { return true; }

      public Object call(Object self, Object... args) {
          // this is like "var e = new Error('myErrorMsg')" in JS code
          JSObject error = (JSObject)errorCtr.newObject("myErrorMsg");
          // equivalent to "throw e;"
          throw (RuntimeException)error.getMember("nashornException");
      }
  }
}


On 31/01/17, 10:04 PM, Attila Sari wrote:
Hi all,

Is it possible to throw ecmascript error from JSObject methods? (that can
be catched later in the script, and will be enriched with filename and line
number)

Thanks,
Attila Sari