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Home » Modeling » TMF (Xtext) » IDEA Plugin Error: ClasscastException(IdeaSetup file generating class cast exception)
IDEA Plugin Error: ClasscastException [message #1767785] Tue, 11 July 2017 06:32 Go to next message
Amit Yadav is currently offline Amit YadavFriend
Messages: 28
Registered: June 2017
Junior Member
Hello All,

I am getting the following error while trying to use the idea plugin generated by xtext. I have no customization for this plugin.
com.org.example.dsl.idea.ExampleDSLBasicIdeaSetup cannot be cast to org.eclipse.xtext.ISetup
java.lang.ClassCastException: com.org.example.dsl.idea.ExampleDSLBasicIdeaSetup cannot be cast to org.eclipse.xtext.ISetup
  at org.eclipse.xtext.idea.lang.AbstractXtextLanguage.getInjector(AbstractXtextLanguage.java:40)
  at org.eclipse.xtext.idea.lang.AbstractXtextLanguage.injectMembers(AbstractXtextLanguage.java:55)
  at org.eclipse.xtext.idea.completion.AbstractCompletionContributor.<init>(AbstractCompletionContributor.java:174)
  at org.eclipse.xtext.xbase.idea.completion.XtypeCompletionContributor.<init>(XtypeCompletionContributor.java:16)
  at org.eclipse.xtext.xbase.idea.completion.XbaseCompletionContributor.<init>(XbaseCompletionContributor.java:112)
  at com.org.example.dsl.idea.completion.AbstractExampleDSLBasicCompletionContributor.<init>(AbstractExampleDSLBasicCompletionContributor.java:11)
  at com.org.example.dsl.idea.completion.ExampleDSLBasicCompletionContributor.<init>(ExampleDSLBasicCompletionContributor.java:15)
  at com.org.example.dsl.idea.completion.ExampleDSLBasicCompletionContributor.<init>(ExampleDSLBasicCompletionContributor.java:11)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
  at org.picocontainer.defaults.InstantiatingComponentAdapter.newInstance(InstantiatingComponentAdapter.java:193)
  at com.intellij.util.pico.CachingConstructorInjectionComponentAdapter.doGetComponentInstance(CachingConstructorInjectionComponentAdapter.java:103)
  at com.intellij.util.pico.CachingConstructorInjectionComponentAdapter.instantiateGuarded(CachingConstructorInjectionComponentAdapter.java:80)
  at com.intellij.util.pico.CachingConstructorInjectionComponentAdapter.getComponentInstance(CachingConstructorInjectionComponentAdapter.java:63)
  at com.intellij.openapi.extensions.AbstractExtensionPointBean.instantiate(AbstractExtensionPointBean.java:75)
  at com.intellij.openapi.extensions.CustomLoadingExtensionPointBean.instantiateExtension(CustomLoadingExtensionPointBean.java:47)
  at com.intellij.lang.LanguageExtensionPoint.access$000(LanguageExtensionPoint.java:28)
  at com.intellij.lang.LanguageExtensionPoint$1.compute(LanguageExtensionPoint.java:42)
  at com.intellij.openapi.util.NotNullLazyValue.getValue(NotNullLazyValue.java:39)
  at com.intellij.lang.LanguageExtensionPoint.getInstance(LanguageExtensionPoint.java:53)
  at com.intellij.codeInsight.completion.CompletionPreloader.preload(CompletionPreloader.java:32)
  at com.intellij.openapi.application.Preloader.a(Preloader.java:74)
  at com.intellij.openapi.application.Preloader$$Lambda$126/1340395291.run(Unknown Source)
  at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:176)
  at com.intellij.openapi.progress.impl.CoreProgressManager$$Lambda$71/2125595444.run(Unknown Source)
  at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:556)
  at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:501)
  at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
  at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:163)
  at com.intellij.openapi.application.Preloader.a(Preloader.java:72)
  at com.intellij.openapi.application.Preloader$$Lambda$125/2090922997.run(Unknown Source)
  at com.intellij.util.concurrency.BoundedTaskExecutor$2.run(BoundedTaskExecutor.java:212)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  at java.lang.Thread.run(Thread.java:745)


ExampleDSL IDEA plugin requires xtext idea core plugin which I installed.

I understand that the class cast exception might be happening because ISetup class probably is loaded by a different class loader (perhaps the xtext idea core plugin contains this class already and that class was loaded by a different class loader). Not sure how to work around this. Any suggestions?

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Re: IDEA Plugin Error: ClasscastException [message #1770831 is a reply to message #1767785] Thu, 17 August 2017 13:39 Go to previous messageGo to next message
Amit Yadav is currently offline Amit YadavFriend
Messages: 28
Registered: June 2017
Junior Member
Bump

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Re: IDEA Plugin Error: ClasscastException [message #1770833 is a reply to message #1770831] Thu, 17 August 2017 13:48 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14665
Registered: July 2009
Senior Member
xtext idea is basically dead and nobody steps up to revive it so the chance of getting an answer is near to zero

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: IDEA Plugin Error: ClasscastException [message #1770920 is a reply to message #1770833] Fri, 18 August 2017 18:56 Go to previous messageGo to next message
Amit Yadav is currently offline Amit YadavFriend
Messages: 28
Registered: June 2017
Junior Member
Christian,

Do you mean its no longer supported ?

is there any alternative ?

Thanks,

Amit

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Re: IDEA Plugin Error: ClasscastException [message #1770921 is a reply to message #1770920] Fri, 18 August 2017 19:04 Go to previous message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14665
Registered: July 2009
Senior Member
yes there is no longer active delopment of the xtext idea part until / unless somebody steps up
no, besides voting for idea getting language server protocol support

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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