#vulnerable code 
                                @Test
    public void testCreatingHttpSubscriptionJsonMapping() {
        Subscription subscription = Subscription.Subscribe(
                Transport.transport("jms").
                        option("topic", "foo"));

        subscription.map(
                Mapper.mapper("json").
                        map("$.sensorData.time").
                        map("$.sensorData.data"));

        subscription.insertInto("FooStream");

        ExecutionPlan.executionPlan("test").addSubscription(subscription);

    } 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void testCreatingHttpSubscriptionJsonMapping() {
        Subscription subscription = Subscription.Subscribe(
                Transport.transport("jms").
                        option("topic", "foo"));

        subscription.map(
                Mapping.format("json").
                        map("$.sensorData.time").
                        map("$.sensorData.data"));

        subscription.insertInto("FooStream");

        ExecutionPlan.executionPlan("test").addSubscription(subscription);

    }