Issues with running tutorial

[xkusnir]

Hi, I am struggling with running the tutorial. I downloaded the finish source codes (https://github.com/ftsrg/gamma/tree/master/tutorial/hu.bme.mit.gamma.tutorial.finish) and followed the instructions in tutorial README to compile the project. Compiling interfaces and Generating artefacts work as expected. However, when trying to run Generate Statechart Java Code (Step https://github.com/ftsrg/gamma/blob/master/tutorial/README.md#code-generation), I get java ClassCastException. The details of the exception are provided below.

I installed Eclipse and Gamma based on the instructions provided here.
I am using macOS 13.7.6, Eclipse 2023-09 (4.29.0), Gamma 2.11.0, java 17.0.15

Could you please help me with the investigation of this problem?
Thank you in advance.

java.lang.ClassCastException: class hu.bme.mit.gamma.statechart.composite.impl.SynchronousCompositeComponentImpl cannot be cast to class hu.bme.mit.gamma.statechart.statechart.StatechartDefinition (hu.bme.mit.gamma.statechart.composite.impl.SynchronousCompositeComponentImpl and hu.bme.mit.gamma.statechart.statechart.StatechartDefinition are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @3010dccb)
class hu.bme.mit.gamma.statechart.composite.impl.SynchronousCompositeComponentImpl cannot be cast to class hu.bme.mit.gamma.statechart.statechart.StatechartDefinition (hu.bme.mit.gamma.statechart.composite.impl.SynchronousCompositeComponentImpl and hu.bme.mit.gamma.statechart.statechart.StatechartDefinition are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @3010dccb)
  hu.bme.mit.gamma.statechart.lowlevel.transformation.commandhandler.CommandHandler.execute(CommandHandler.java:72)
  org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:283)
  org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97)
  jdk.internal.reflect.GeneratedMethodAccessor216.invoke(Unknown Source)
  java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  java.base/java.lang.reflect.Method.invoke(Method.java:569)
  org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
  org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:300)
  org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:234)
  org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
  org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
  org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
  org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:485)
  org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
  org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:438)
  org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:449)
  org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:475)
  org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
  org.eclipse.swt.widgets.Display.sendEvent(Display.java:4646)
  org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524)
  org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547)
  org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532)
  org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325)
  org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4413)
  org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3989)
  org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
  org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:342)
  org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
  org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
  org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:645)
  org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:342)
  org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:552)
  org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:171)
  org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
  org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
  org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
  org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
  org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
  org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
  java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  java.base/java.lang.reflect.Method.invoke(Method.java:569)
  org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
  org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
  org.eclipse.equinox.launcher.Main.run(Main.java:1459)

[grbeni]

Hi,
Gamma 2.11.0 with Eclipse 2023-09 (4.29.0) is a pretty old release, so I could not reproduce the issue. I have the following recommendations:

1. Make sure to click on a .gcd file containing a statechart model (e.g., Controller.gcd) when selecting Generate Statechart Java Code and a .gcd file that contains a composite model (e.g., Crossroad.gcd) when selecting Generate Composition Code > Generate Java Code.
2. Create a new file with .ggen extension in the folder of the statechart model (e.g., Controller), and fill it out like this before right-clicking on it and selecting Gamma Commands > Generate Artefacts (this snippet specifies the task of generating Java code from a Gamma model):

import "Controller.gcd"

code {
	component : Controller
	language : java
}

3. If nothing works, you should wait for the new release due in the coming days.

[grbeni]

See if this release works for you: https://github.com/ftsrg/gamma/releases/tag/v2.12.0
Note that you have to use the pre-generated gcd statecharts from Yakindu.