parsing a JSON string - null pointer exception

[Peter Wallis]

This seems crazy - I used to have it working, and it seems trivial but this:

import org.mozilla.javascript.*;

import java.io.*;

public class JTest {

        public static void main(String[] args) {

                Context cx = Context.enter();

                Scriptable scope = cx.initStandardObjects();

                try{

                        NativeJSON.parse(cx,scope,"{\"foo\":\"bar\"}",null);

                } catch(Exception ex) {

                        ex.printStackTrace();

                } finally {

                        Context.exit();

                }

        }

}

Gives a null pointer exception in NativeJSON.walk (line 177 of the java file)

It seems so trivial that I am guessing it is me rather than a bug.  Any help appreciated.

P

[Tony Germano]

It looks like you want to call the 3 argument version of parse that doesn't take a reviver, but it is private (I'm not sure why.)

To call the 4 argument version, it looks like you will need to pass a Callable reviver instead of null.

What if you add your JSON string to the scope, and do this?

cx.evaluateString(scope, "JSON.parse(jsonString);", "parse.js", 1, null);