[Php-java-bridge-users] passing objects from PHP to JAVA

Sorry, once again ;-)

I wrote this little part of a Java method for testing:

PhpScriptEngine engine = new PhpScriptEngine();
String s =  "<?php \n";
s +=	"require_once 'MyClass.php'; \n";
s += "java_context()->setAttribute( 'obj', new MyClass(), 100 ); \n";
s += "java_context()->call(java_closure()); \n";
s +=	"?>";
engine.eval( new StringReader(s) );
Invocable inv = (Invocable) engine;
inv.invokeMethod( engine.get("obj"), "saySomething", new Object() );

The resulting errors are:
java.lang.NullPointerException
	at java.lang.reflect.Proxy.getInvocationHandler(Proxy.java:636)
	at php.java.script.PhpScriptEngine.invokeMethod(PhpScriptEngine.java:202)
	at Bootstrap.main(Bootstrap.java:30)
Nov 17 16:30:28 JavaBridge ERROR: PHP Warning:  Argument is not (or does not 
contain) Java object(s). in - on line 3

The NullPointerException happens in the line where invokeMethod is called.
Line 3 of the PHP script is the one where setAttribute() is called. As I 
understand the error message text, it is not possible to set a PHP object as 
an attribute to the java context, but only Java objects?

Another thing I tried was:
String s =  "<?php \n";
s +=	"require_once 'MyClass.php'; \n";
s += "$obj = new MyClass(); \n";
s += "java_context()->call(java_closure()); \n";
s +=	"?>";
but there was the same NullPointerException.

This was inspired from the Javascript example provided by SUN here:
https://java.sun.com/javase/6/docs/technotes/guides/scripting/programmer_guide/index.html#invoke

        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("JavaScript");
        String script = "var obj = new Object(); obj.hello = function(name) 
{ print('Hello, ' + name); }";
        engine.eval(script);
        Invocable inv = (Invocable) engine;
        Object obj = engine.get("obj");
        inv.invokeMethod(obj, "hello", "Script Method !!" );

Any chance todo something similar with PHP?

Regards,
Verena