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[JET2] Iterating through the elements of an EList in an EMF model [message #56561]

Thu, 29 January 2009 11:14

Youmm P.

Messages: 140
Registered: July 2009

Senior Member

Hello,

I've got an EClass with a method "EList<State> getValidStates()".
State is defined as "public enum State implements Enumerator".

I would like to iterate on the State contained in the EList in the JET
templates.

I tried this:

<c:iterate select="$element/validStates" var="validState">
<c:get select="$validState" />
</c:iterate>

but it doesn't work.

Is it possible to do what I'm trying to do?

Thanks in advance.

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Re: [JET2] Iterating through the elements of an EList in an EMF model [message #56669 is a reply to message #56561]

Thu, 29 January 2009 14:56

Paul Elder

Messages: 849
Registered: July 2009

Senior Member

Youmm:

JET's XPath engine uses EMFs reflective APIs. It only sees
EStructuralFeature implementations (EReferences and EAttributes). I
currently does not do reflection on the actual Java class for methods that
are not declared in the ECore model.

Is there an EReference or an EAttribute declaration of validSates ?

Paul

"Youmm P." <kototamo@gmail.com> wrote in message
news:gls2rt$mua$1@build.eclipse.org...
> Hello,
>
>
> I've got an EClass with a method "EList<State> getValidStates()".
> State is defined as "public enum State implements Enumerator".
>
> I would like to iterate on the State contained in the EList in the JET
> templates.
>
> I tried this:
>
> <c:iterate select="$element/validStates" var="validState">
> <c:get select="$validState" />
> </c:iterate>
>
> but it doesn't work.
>
> Is it possible to do what I'm trying to do?
>
> Thanks in advance.

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Re: [JET2] Iterating through the elements of an EList in an EMF model [message #56696 is a reply to message #56669]

Thu, 29 January 2009 15:28

Youmm P.

Messages: 140
Registered: July 2009

Senior Member

> Is there an EReference or an EAttribute declaration of validSates ?
No, the EList values are dynamically created by the getValidStates function.

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Re: [JET2] Iterating through the elements of an EList in an EMF model [message #56722 is a reply to message #56696]

Fri, 30 January 2009 14:16

Paul Elder

Messages: 849
Registered: July 2009

Senior Member

Youmm:

I think your best choice is to drop into Java code...

a) Make sure your JET project has a dependency on the plug-in defining the
Ecore model. (Open plugin.xml or META-INF/MANIFEST.MF, and go to the
Dependencies tab)

b) Add imports for the classes your template was to access

<%-- import the classes you'll need --%>
<%@jet import="a.b.c.YourElement a.b.c.State" %>
<%@jet import="org.eclipse.jet.XPathContextExtender" %>

c) get the JET variable as a Java variable. Assuming $element is the JET
variable containing EObject:

<%
YourElement element =
(YourElement)XPathContext.getInstance(context).resolveAsObje ct(null, "$element");
%>

d) Write the Java scriptlet

<% for(State state : element.getValidStates() ) { %>
.... template content <%= state.toString %>
<% } %>

Paul

"Youmm P." <kototamo@gmail.com> wrote in message
news:glshpg$vqi$1@build.eclipse.org...
>> Is there an EReference or an EAttribute declaration of validSates ?
> No, the EList values are dynamically created by the getValidStates
> function.

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