On 4/14/08, Ouyang, Landon - ES/RDR -Gil <[EMAIL PROTECTED]> wrote:
> Hi Rahul,
>
> My (limited) understand of JavaBeans is that a JavaBean object must
> implement java.io.Serializable, has a public no argument constructor,
> and contains set/get methods for properties. So I setup my result class
> as follows:
>
> class result implements Serializable
<snip/>
I think making the class public will fix the problem.
This is no longer a [scxml] discussion. My preference would be to have
a new email thread, if the discussion continues.
-Rahul
> {
> public result() {}
> private int value;
> public int getValue()
> { return value; }
> public void setValue(int nNum)
> { value = nNum; }
> }
>
> However, the state transition still does not work!
>
> FYI, I was able to prove that the object is sent to the engine correctly
> using:
>
> result newResult = (result)getEngine().getRootContext().get("result");
>
> But for some reason, I cannot retrieve/use "result.value" in my XML
> file!
>
> Any ideas what I'm missing here? Thanks for the help.
>
>
> --
> Landon Ouyang
> Member Technical Staff
> ITT Electronics Systems, Radar Systems - Gilfillan
> 7821 Orion Ave,
> Van Nuys, CA 91406
> (818) 901-2982
>
> -----Original Message-----
> From: Rahul Akolkar [mailto:[EMAIL PROTECTED]
>
> Sent: Friday, April 11, 2008 6:56 PM
> To: Jakarta Commons Users List
> Subject: Re: [SCXML] W3C specs compatibility and state transition issues
>
> On Fri, Apr 11, 2008 at 7:15 PM, Ouyang, Landon - ES/RDR -Gil
> <[EMAIL PROTECTED]> wrote:
> > Hmmm....
> >
> > Given your snippet, I assumed this would work:
> >
> > result aResult = new result();
> >
> > if(bIsTest)
> > aResult.value = 1;
> > else
> > aResult.value = 0;
> >
> > getEngine().getRootContext().set("result", aResult);
> >
> > where the XML transition is conditional on "result.value eq 1". Why
> > doesn't it work?
> >
> <snip/>
>
> Try adding getter and setter methods, as I suggest below (for property
> "value" in this example). Detailed discussion is in the JavaBeans
> spec, which forms the basis of bean property access in most ELs we
> use.
>
> -Rahul
>
>
> > --
> > Landon Ouyang
> > Member Technical Staff
> > ITT Electronics Systems, Radar Systems - Gilfillan
> > 7821 Orion Ave,
> > Van Nuys, CA 91406
> > (818) 901-2982
> >
> >
> > -----Original Message-----
> > From: Rahul Akolkar [mailto:[EMAIL PROTECTED]
> >
> > Sent: Friday, April 11, 2008 2:18 PM
> > To: Jakarta Commons Users List
> > Subject: Re: [SCXML] W3C specs compatibility and state transition
> issues
> >
> > On Fri, Apr 11, 2008 at 5:01 PM, Ouyang, Landon - ES/RDR -Gil
> > <[EMAIL PROTECTED]> wrote:
> > > I figured out the solution:
> > >
> > > I needed to remove the event properties from the conditional
> > > transitions. So if I change the state to:
> > >
> > > <state id="six">
> > > <datamodel>
> > > <data name="result">
> > > <value>0</value>
> > > </data>
> > > </datamodel>
> > > <transition cond="result.value eq '1'" target="zero"/>
> > > <transition cond="result.value eq '0'" target="five"/>
> > > <transition target="three" event="display.prev"/>
> > > </state>
> > >
> > > the code will work! Am I missing any other crucial details?
> > >
> > <snip/>
> >
> > Not really, but couple of comments:
> >
> > * At a quick glance, I suspect you don't need the <datamodel>
> > specified declaratively, so you can just remove the entire <datamodel>
> > element (we are setting "result.value" via Java handlers). A brief
> > discussion about datamodels is here:
> >
> > http://commons.apache.org/scxml/guide/datamodel.html
> >
> > * When I gave the example (below), I intended "fooresult.success" and
> > "fooresult.numfailures" to be expressions of the flavor bean.property
> > i.e. fooresult was an instance of:
> >
> > class FooResult {
> > get/setSuccess()
> > get/setNumfailures()
> > }
> >
> > Generally better if you want to return a data structure, rather than
> > multiple "flat variables" (your example is fine, for one value its
> > much overhead).
> >
> > -Rahul
> >
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