[news.eclipse.modeling.m2m] Re: [ATL] Copying one model with reference t

[William Piers <william.piers@xxxxxxx>]

Hello,

Goetz Botterweck a écrit :
> WHAT I WANT TO DO
>
> I have two model files My.amodel and My.bmodel
> My.bmodel contains references to My.amodel
>
> Now I want to use ATL to create a copy from My.bmodel to My_out.bmodel
> Preserving the references to My.amodel

So you don't want to recreate a My_out.amodel ? I ask because that's the 
case in your transformation sample.

> THE PROBLEM
>
> This works as long as I just copy the elements in My.bmodel without the 
> refs to My.amodel.
>
> As soon as I try to set the references to the corresponding elements in 
> My.amodel the transformation fails with a java.lang.ClassCastException.
> See the problematic line at ##### in the ATL file below.
>
> Thanks for any hints,
> Goetz
>
> See attachment with zip of project.

I tried your sample but the metamodel B didn't validate because the 
reference to AElements was incorrectly set.

Here is your file :
   <eStructuralFeatures xsi:type="ecore:EReference" 
name="correspondingAElement"
        ordered="false" eType="ecore:EClass 
../../org.example.amodel/model/amodel.ecore#//AElement"/>

And the value I corrected :
    <eStructuralFeatures xsi:type="ecore:EReference" 
name="correspondingAElement"
        ordered="false" eType="ecore:EClass amodel.ecore#//AElement"/>

> --------- ADDITIONAL INFOS ---------
>
> I assume that the problem comes from the fact that ATL tries to handle 
> elements in My.amodel and for some reason it has wrong information about 
> the meta-model and the classes in it. Hence, it tries to do a cast. 
> Whereas I would expect it to leave My.amodel untouched.
>
> Could something be wrong with the "registration" or identification of 
> EMF/Ecore meta models (with Namespace/URI) . Could I check something 
> about that? I noticed that, despite the launch configuration, the 
> transformation will only execute of the .ecore files are in certain 
> folders in the workspace.
>
> --------- copyBModelWithRefs.atl ---------
>
> module copyBModelWithoutRefs; -- Module Template
> create bout : BMETA, aout : AMETA from bin : BMETA, ain : AMETA;

If you don't want to copy AMETA elements, you don't need to refer to the 
 ain/aout models.
Just do :
create bout : BMETA from bin : BMETA;

When there is a reference between two input models, the metamodel 
reference is implicit, and the two models are loaded.

> rule BModel {
>     from s : BMETA!BModel
>     to t : BMETA!BModel mapsTo s (
>         name <- s.name.debug('BModel'),       
>         elements <- s.elements
>     )
> }

Notice that the mapsTo instruction belongs to ATL syntax but has no 
effects for now.

> rule BElement {
>     from s : BMETA!BElement
>     to t : BMETA!BElement mapsTo s (
>         name <- s.name.debug('BElement'),
>        
>         -- ##### THIS IS THE PROBLEMATIC LINE #####
>         correspondingAElement <- s.correspondingAElement
>         )
> }

Finally, you need to know that the loading of referenced metamodel has 
been corrected recently. So check you use the last ATL version.

Best regards,

William

> --------- Stacktrace ---------
>
> INFO: BModel: 'BModel1'
> INFO: BElement: 'BElement1'
> SCHWERWIEGEND: ****** BEGIN Stack Trace
> SCHWERWIEGEND:     exception:
> SCHWERWIEGEND: The value of type 'class 
> org.eclipse.emf.ecore.impl.DynamicEObjectImpl' must be of type 
> 'org.eclipse.emf.ecore.impl.EClassImpl@8558b7 (name: AElement) 
> (instanceClassName: null) (abstract: false, interface: false)'
> java.lang.ClassCastException: The value of type 'class 
> org.eclipse.emf.ecore.impl.DynamicEObjectImpl' must be of type 
> 'org.eclipse.emf.ecore.impl.EClassImpl@8558b7 (name: AElement) 
> (instanceClassName: null) (abstract: false, interface: false)'
>     at 
> org.eclipse.emf.ecore.impl.EStructuralFeatureImpl$InternalSettingDelegateSingleEObject.dynamicGet(EStructuralFeatureImpl.java:2301) 
>
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1017) 
>
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1002) 
>
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:994)
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:989)
>     at 
> org.eclipse.m2m.atl.drivers.emf4atl.ASMEMFModelElement.get(ASMEMFModelElement.java:147) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:301)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:171)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:143) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:101) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:240)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:338)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:171)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:143) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:101) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:240)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:171)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMInterpreter.<init>(ASMInterpreter.java:299) 
>
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:169)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:111)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:87)
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlRegularVM.runAtlLauncher(AtlRegularVM.java:326) 
>
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlRegularVM.runAtlLauncher(AtlRegularVM.java:426) 
>
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlRegularVM.launch(AtlRegularVM.java:398) 
>
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlLaunchConfigurationDelegate.launch(AtlLaunchConfigurationDelegate.java:42) 
>
>     at 
> org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:759) 
>
>     at 
> org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:608) 
>
>     at 
> org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:899) 
>
>     at 
> org.eclipse.debug.internal.ui.DebugUIPlugin$7.run(DebugUIPlugin.java:1102)
>     at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
> SCHWERWIEGEND: A.main() : ??#24 null
> SCHWERWIEGEND:     local variables = {self=copyBModelWithoutRefs : 
> ASMModule}
> SCHWERWIEGEND:     local stack = []
> SCHWERWIEGEND: A.__exec__() : ??#18 null
> SCHWERWIEGEND:     local variables = {e=TransientLink {rule = 
> 'BElement', sourceElements = {s = bin!BElement1}, targetElements = {t = 
> bout!BElement1}, variables = {}}, self=copyBModelWithoutRefs : ASMModule}
> SCHWERWIEGEND:     local stack = []
> SCHWERWIEGEND: A.__applyBElement(1 : NTransientLink;) : ??#20 18:28-18:51
> SCHWERWIEGEND:     local variables = {t=bout!BElement1, s=bin!BElement1, 
> link=TransientLink {rule = 'BElement', sourceElements = {s = 
> bin!BElement1}, targetElements = {t = bout!BElement1}, variables = {}}, 
> self=copyBModelWithoutRefs : ASMModule}
> SCHWERWIEGEND:     local stack = [bout!BElement1, bout!BElement1, 
> copyBModelWithoutRefs : ASMModule]
> SCHWERWIEGEND: ****** END Stack Trace
> INFO: Execution terminated due to error (see launch configuration to 
> allow continuation after errors).
> SCHWERWIEGEND: null
> java.lang.RuntimeException
>     at 
> org.eclipse.m2m.atl.engine.vm.SimpleDebugger.error(SimpleDebugger.java:195)
>     at 
> org.eclipse.m2m.atl.engine.vm.StackFrame.printStackTrace(StackFrame.java:95) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.StackFrame.printStackTrace(StackFrame.java:87) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:173)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:143) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:101) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:240)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:338)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:171)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:143) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:101) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:240)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:171)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMInterpreter.<init>(ASMInterpreter.java:299) 
>
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:169)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:111)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:87)
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlRegularVM.runAtlLauncher(AtlRegularVM.java:326) 
>
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlRegularVM.runAtlLauncher(AtlRegularVM.java:426) 
>
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlRegularVM.launch(AtlRegularVM.java:398) 
>
>     at 
> org.eclipse.m2m.atl.adt.launching.AtlLaunchConfigurationDelegate.launch(AtlLaunchConfigurationDelegate.java:42) 
>
>     at 
> org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:759) 
>
>     at 
> org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:608) 
>
>     at 
> org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:899) 
>
>     at 
> org.eclipse.debug.internal.ui.DebugUIPlugin$7.run(DebugUIPlugin.java:1102)
>     at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
> Caused by: java.lang.ClassCastException: The value of type 'class 
> org.eclipse.emf.ecore.impl.DynamicEObjectImpl' must be of type 
> 'org.eclipse.emf.ecore.impl.EClassImpl@8558b7 (name: AElement) 
> (instanceClassName: null) (abstract: false, interface: false)'
>     at 
> org.eclipse.emf.ecore.impl.EStructuralFeatureImpl$InternalSettingDelegateSingleEObject.dynamicGet(EStructuralFeatureImpl.java:2301) 
>
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1017) 
>
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1002) 
>
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:994)
>     at 
> org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:989)
>     at 
> org.eclipse.m2m.atl.drivers.emf4atl.ASMEMFModelElement.get(ASMEMFModelElement.java:147) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:301)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:171)
>     ... 22 more