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quickfix for referenced object not found [message #1733632]

Mon, 30 May 2016 10:27

Eclipse User

I want to provide a quickfix for the error that a referenced object is not found.
How can I do that ?

Re: quickfix for referenced object not found [message #1733635 is a reply to message #1733632]

Mon, 30 May 2016 10:35

Eclipse User

customizing LinkingDiagnosticMessageProvider and return a custom error code + then implement a quickfix does not work.
see org.eclipse.xtext.xtext.XtextLinkingDiagnosticMessageProvider and XtextGrammarQuickfixProvider (for missing rule in xtext)

Re: quickfix for referenced object not found [message #1733673 is a reply to message #1733635]

Mon, 30 May 2016 18:53

Eclipse User

Christian Dietrich wrote on Mon, 30 May 2016 10:35

customizing LinkingDiagnosticMessageProvider and return a custom error code + then implement a quickfix does not work.
see org.eclipse.xtext.xtext.XtextLinkingDiagnosticMessageProvider and XtextGrammarQuickfixProvider (for missing rule in xtext)

Thank you for the quick answer.

I have inherited LinkingDiagnosticMessageProvider and overriden getUnresolvedProxyMessage ?
Btw. the mentioned class LinkingDiagnosticMessageProvider is restricted API.

I have implemented my QuickfixProvider.

Where do I have to register my LinkingDiagnosticMessageProvider ?

Re: quickfix for referenced object not found [message #1733684 is a reply to message #1733673]

Mon, 30 May 2016 23:02

Eclipse User

Inside the runtime module

Re: quickfix for referenced object not found [message #1733739 is a reply to message #1733684]

Tue, 31 May 2016 06:23

Eclipse User

I have the following implementation:

	@Override
	public DiagnosticMessage getUnresolvedProxyMessage(final ILinkingDiagnosticContext context) {
		EObject context2 = context.getContext();
		DiagnosticMessage diagnosticMessage = new SponsorGroupModelSwitch<DiagnosticMessage>() {
			@Override
			public DiagnosticMessage caseSponsorGroup(SponsorGroup sponsorGroup) {
				return new DiagnosticMessage(context.getLinkText()+" cannot be resolved to a SponsorGroup", Severity.ERROR,
						UNRESOLVED_SPONSOR_GROUP, context.getLinkText());
			}

		}.doSwitch(context2);
		return diagnosticMessage != null ? diagnosticMessage : super.getUnresolvedProxyMessage(context);
	}

I'm expecting a missing reference to a SponsorGroup. Or do I need to check for the parent object of the missing reference ?

Re: quickfix for referenced object not found [message #1733740 is a reply to message #1733739]

Tue, 31 May 2016 06:24

Eclipse User

depends on your grammar.

Re: quickfix for referenced object not found [message #1733742 is a reply to message #1733740]

Tue, 31 May 2016 06:32

Eclipse User

maybe you wantr to simply test for org.eclipse.xtext.linking.ILinkingDiagnosticMessageProvider.ILinkingDiagnosticContext.getReference()

Re: quickfix for referenced object not found [message #1733751 is a reply to message #1733742]

Tue, 31 May 2016 08:13

Eclipse User

Thankx, I solved the issue.

You need to inherit from

org.eclipse.xtext.linking.impl.LinkingDiagnosticMessageProvider

and check for the parent object in

org.eclipse.xtext.linking.impl.LinkingDiagnosticMessageProvider.getUnresolvedProxyMessage()

and then check the reference with

org.eclipse.xtext.linking.ILinkingDiagnosticMessageProvider.ILinkingDiagnosticContext.getReference()

The result is:

@Override
	public DiagnosticMessage getUnresolvedProxyMessage(final ILinkingDiagnosticContext context) {
		DiagnosticMessage diagnosticMessage = new YourModelSwitch<DiagnosticMessage>() {
			@Override
			public DiagnosticMessage caseYourParentObject(YourParentObject parent) {
				if (context.getReference().equals(YourModelPackage.Literals.YOUR_PARENT_OBJECT__YOUR_REFERENCE)) {
					return new DiagnosticMessage(context.getLinkText() + " cannot be resolved to a YourReferencedObject",
								Severity.ERROR, YOUR_QUICK_FIX_CODE) context.getLinkText());
                             }
                             return null;
			}

		}.doSwitch(context.getContext());
		return diagnosticMessage != null ? diagnosticMessage : super.getUnresolvedProxyMessage(context);
	}

to activate this solution you need to register your ddd in the YourModelRuntimeModule:

    public Class<? extends LinkingDiagnosticMessageProvider> bindLinkingDiagnosticMessageProvider() {
        return YourModelLinkingDiagnosticMessageProvider.class;
    }

The corresponding QuickFix goes to the usual location.

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