Paul:
I appreciate your prompt response and suggestions.
Yes, I'm aware of the toString() on a null object. My attempt is to
identify how it landed on statement that doesn't make any sense to me.
That's the main issue. As you suggested I attempted to get more meaningful
exception stack. Tried the following set of parameters, still I only get a
cryptic message.
-remoteUI "${gwt_remote_ui_server_port}:${unique_id}"
-startupUrl Peruse.html
-logLevel ALL
-style PRETTY
-XmethodNameDisplayMode FULL
-gen DEBUGGING
-codeServerPort 9997
-port 8888
-war /.../.../.../Repository/peruse/war com.peruselab.peruse.Peruse
Does that combination make sense? I do see a ton of activity in the Eclipse
console but no use in the stack trace.
On Tuesday, March 12, 2019 at 6:13:46 PM UTC-4, Paul Robinson wrote:
>
> I don't think you're showing us enough code. The exception indicates
> something is calling toString() on a null object, but there's nothing in
> what you've shown us that calls a toString() method.
>
> Try compiling in pretty mode with full stack traces. You'll see better
> error information.
>
> Paul
>
> On Tue, 12 Mar 2019, 21:53 Velusamy Velu, <[email protected] <javascript:>>
> wrote:
>
>> Adding a larger screen clip.
>>
>>
>> [image: Screen Shot 2019-03-12 at 5.40.52 PM.png]
>>
>>
>> On Tuesday, March 12, 2019 at 5:48:59 PM UTC-4, Velusamy Velu wrote:
>>>
>>> Friends:
>>>
>>> I'm developing a Chemical drawing tool and have been progressing
>>> steadily with a lot of difficulties. My technology stack is Java 8, GWT
>>> 2.8.2, GMD 2.x, Eclipse Photon, running on a MacBook Pro, and Chrome |
>>> Firefox | Opera for testing. A limited functioning pilot is running at
>>> http://peruselab.com.
>>>
>>> I just ran into a trouble that I couldn't figure out on my own. Below
>>> are the relevant snippets of code that's causing trouble. The call (1)
>>> ActionHandlerMap.getHandler(action) is expected to return an instance
>>> of PeruseEventHandler. I expect the sequence of execution to be 1, 2, & 3.
>>> However, upon returning from 2 (verified with the debugger) I see the
>>> control going to 4 (screen clip 1) followed by throwing an exception
>>> (screen clip 2). Any idea what could be wrong? Your help will be greatly
>>> appreciated.
>>>
>>> ...
>>>
>>> PeruseEventHandler eventHandler = ActionHandlerMap.*getHandler*(action);
>>> // 1
>>> Globals.*currentShape* = eventHandler.handle(*null*, *null*); // 3
>>> ...
>>>
>>> *public* *class* ActionHandlerMap {
>>>
>>> *public* *static* *final* Map<Action, PeruseEventHandler>
>>> *ACTION_HANDLER_MAP* = *new* HashMap<>();
>>>
>>>
>>> *static* {
>>>
>>> *ACTION_HANDLER_MAP*.put(Action.*DRAW_SINGLE_BOND*, *new*
>>> SingleBondDrawingHandler());
>>>
>>> }
>>>
>>>
>>> *public* *static* PeruseEventHandler getHandler(Action anAction) {
>>>
>>> *return* *ACTION_HANDLER_MAP*.get(anAction); // 2
>>>
>>> }
>>>
>>> }
>>>
>>>
>>> *public* *class* Globals {
>>>
>>> *public* *static* Action *action*;
>>>
>>> *public* *static* Shape *currentShape*; // 4
>>>
>>> }
>>> Enter code here...
>>>
>>>
>>> [image: Screen Shot 2019-03-12 at 5.36.35 PM.png]
>>>
>>> Screen clip 1
>>>
>>>
>>>
>>> [image: Screen Shot 2019-03-12 at 5.40.52 PM.png]
>>>
>>>
>>>
>>> --
>> You received this message because you are subscribed to the Google Groups
>> "GWT Users" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to [email protected] <javascript:>.
>> To post to this group, send email to [email protected]
>> <javascript:>.
>> Visit this group at https://groups.google.com/group/google-web-toolkit.
>> For more options, visit https://groups.google.com/d/optout.
>>
>
--
You received this message because you are subscribed to the Google Groups "GWT
Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/d/optout.
