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Home » Modeling » TMF (Xtext) » mwe2 Workflow passed, but Eclipse can't start my DSL-Editor(Plug-in ch.lpno.xtext.dsl.Formlayout.ui was unable to load class ch.lpno.xtext.dsl.formlayout.ui.FormlayoutExecutableExtensionFactory.)

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mwe2 Workflow passed, but Eclipse can't start my DSL-Editor [message #1098219]

Fri, 30 August 2013 20:03

Othmar Lippuner

Messages: 12
Registered: August 2013

Junior Member

I defined this DSL to describe a Screenlayout:

Formlayout.xtext:

grammar ch.lpno.xtext.dsl.formlayout.Formlayout with org.eclipse.xtext.common.Terminals generate formlayout "http://www.eclipse.org/formlayout" Formlayout : 'formlayout' formdecription=Description 'frmID' frmID=ID datasource=Datasource (pkfields+=PKfields)? otherregions=OtherRegions; Datasource: 'table' tableID=ID ('view' viewID=ID)?; Description: STRING; PKfields: 'pkfields' (pkfields+=PKfield)+; PKfield: 'label' pkLabelID=ID 'fieldname' fieldname=ID 'datatype' datatype=ID; Field: 'label' labelID=ID 'fieldname' fieldname=ID 'datatype' datatype=ID; OtherRegions: (region+=Region | tabbedRegion+=TabbedRegion)+; TabbedRegion: 'tabbedregion' STRING ('tab' tabId+=ID fields+=Fields)+; Region: 'region' STRING Fields ; Fields: (field+=Field)+;

It's compiled with no error. The workflow GenerateFormlayout.mwe2 is done with no error or warning.

Then I launch another runtime eclipse, to start writting a code in my newly created DSL. Eclipse starts but in console a got an error

Plug-in ch.lpno.xtext.dsl.Formlayout.ui was unable to load class ch.lpno.xtext.dsl.formlayout.ui.FormlayoutExecutableExtensionFactory.

org.eclipse.core.runtime.CoreException: Plug-in ch.lpno.xtext.dsl.Formlayout.ui was unable to load class ch.lpno.xtext.dsl.formlayout.ui.FormlayoutExecutableExtensionFactory.
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194)
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:176)
	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
	at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
	at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
	at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:282)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:278)
... some more

What is wrong?
The bolded part of term, is a thing that makes me insecure:

generate formlayout "http://www.eclipse.org/formlayout"
is this correct? How is this interpreted?

[Updated on: Sat, 31 August 2013 09:27]

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Re: mwe2 Workflow passed, but Eclipse can't stand my DSL-Editor [message #1098316 is a reply to message #1098219]

Fri, 30 August 2013 23:32

Ian McDevitt

Messages: 70
Registered: December 2012
Location: Belfast

Member

Was the FormlayoutExecutableExtensionFactory.java file generated in your ui/src-gen folder?

If so, then if you post its contents we could compare.

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Re: mwe2 Workflow passed, but Eclipse can't stand my DSL-Editor [message #1098573 is a reply to message #1098316]

Sat, 31 August 2013 09:24

Othmar Lippuner

Messages: 12
Registered: August 2013

Junior Member

Meanwhile I got the idea to work from scratch in a new xtext project. The error was gone and I could work firsttime in my DSL editor. Now I extended and changed the syntax and I get the same error message again. Seems to look like a cleanup bug, that happens before the new code is generated?

The generated code in that file is the same in both projects:

/*
 * generated by Xtext
 */
package ch.lpno.xtext.dsl.formlayout.ui;

import org.eclipse.xtext.ui.guice.AbstractGuiceAwareExecutableExtensionFactory;
import org.osgi.framework.Bundle;

import com.google.inject.Injector;

import ch.lpno.xtext.dsl.formlayout.ui.internal.FormlayoutActivator;

/**
 * This class was generated. Customizations should only happen in a newly
 * introduced subclass. 
 */
public class FormlayoutExecutableExtensionFactory extends AbstractGuiceAwareExecutableExtensionFactory {

	@Override
	protected Bundle getBundle() {
		return FormlayoutActivator.getInstance().getBundle();
	}
	
	@Override
	protected Injector getInjector() {
		return FormlayoutActivator.getInstance().getInjector(FormlayoutActivator.CH_LPNO_XTEXT_DSL_FORMLAYOUT_FORMLAYOUT);
	}
	
}

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