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Proposal for Jvm subtypes [message #955630]

Tue, 23 October 2012 23:40

Edwin Park

Messages: 124
Registered: July 2009

Senior Member

Hi,

I have an Xtext language where I'd like to use references to JvmTypes, but I'd like to specifically restrict the content proposal to only show types that implement a particular interface. What's the best way to do this?

Thanks,
Edwin

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Re: Proposal for Jvm subtypes [message #955937 is a reply to message #955630]

Wed, 24 October 2012 05:40

Christian Dietrich

Messages: 13614
Registered: July 2009

Senior Member

Hi you may have a look/change what xbase does with
completeJvmParameyrizedTypeReference / completeJavaTypes with a
restricted filter (not the all filter) in xbaseproposalprovider
Regards, Christian

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Re: Proposal for Jvm subtypes [message #961560 is a reply to message #955630]

Sun, 28 October 2012 11:26

Lorenzo Bettini

Messages: 1770
Registered: July 2009
Location: Firenze, Italy

Senior Member

Hi

in your content proposals class you can inject

@Inject
private ITypesProposalProvider typeProposalProvider;
@Inject
private JvmTypesBuilder typesBuilder;

and then do something like

@Override
public void completeXXXX_YYYY(EObject model,
Assignment assignment, ContentAssistContext context,
ICompletionProposalAcceptor acceptor) {
// we show only subtypes of AbstractDeclarativeValidator
showOnlySubtypesOf(model, context, acceptor,
AbstractDeclarativeValidator.class,
<The EStructuralFeature you want to create proposals for, e.g., YYYY>);
}

protected void showOnlySubtypesOf(EObject model,
ContentAssistContext context,
ICompletionProposalAcceptor acceptor,
Class<?> superType, EReference reference) {
typeProposalProvider.createSubTypeProposals(
typesBuilder.newTypeRef(model, superType).getType(), this,
context, reference, acceptor);
}

hope this helps
Lorenzo

On 10/24/2012 01:40 AM, Edwin Park wrote:
> Hi,
>
> I have an Xtext language where I'd like to use references to JvmTypes,
> but I'd like to specifically restrict the content proposal to only show
> types that implement a particular interface. What's the best way to do
> this?
>
> Thanks,
> Edwin
>

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