[news.eclipse.modeling.gmt.amw] Re: [ATL] Injection problem in qATL

[Frédéric Jouault <frederic.jouault@xxxxxxxxxxxxxx>]

Hello Ivano,

Could you please remember to prefix the subject of your ATL-related 
posts to the M2M newsgroup with [ATL] as I did in this reply?

Additionally, your question may also be of interest to the AMW newsgroup 
readers. Therefore, I added it in copy.


The problem you encountered seems to occur because injection of 'true' 
cannot proceed. This may be because the ATL parser is not available in 
the ant launch configuration classpath. You could try adding it.


Alternatively, you could also directly write the code that will create 
the expression you want in the target pattern. For instance, to add 'true':


rule InPatternElement {
from --elements of a model -- source Element
        amw: AMW!InputElement
to
    atl: ATL!InPattern (
        elements <- element,
        filter <- filter
    ),
    filter : ATL!BooleanExp (
        booleanSymbol <- true
    ),
    element : ATL!SimpleInPatternElement(
        varName <- amw.getVarName(),
        type <- aType
    ),
--    -- creates a new model element because it may have repeated 
elements
    aType : ATL!OclModelElement (
        name <- thisModule.getLeftInstance(amw.element.ref).name,
        model <- 
thisModule.resolveTemp(AMW!InModelRef.allInstancesFrom('IN')->select ( e 
| true)->first(),'ametamodel')
        )
}


You may not want to build your target pattern elements by just looking 
at the metamodel. Then, you can write an ATL file (e.g., a query), and 
inject it to see what elements you have to create.


Regards,

Frédéric Jouault


Ivano wrote:
> Hi all, I have at first sight a basic problem, but after 2 days I didn't 
> even resolve it.
>
> I am developing an HOT transformation that I want to call directly from 
> the weaving panel (as in qATL).
>
> The problem is that when I try to inject ATL code into my resulting ATL 
> model, I get an exception (the stack trace of the exception is attached 
> at the end of the post).
>
> I even tried to modify the SimpleATLtoATL.atl transformation of the 
> plug-in org.eclipse.gmt.weaver.qatl, but it did not work.
>
> Notice that I modify ONLY the transformation, the source code of the 
> plug-in remains the same.
>
> I modified only the following rule:
>
> -------------------------------------------------------------
> rule InPatternElement {
> from --elements of a model -- source Element
>         amw: AMW!InputElement    
> to
>     atl: ATL!InPattern (
>         elements <- element
>     ),
>        element : ATL!SimpleInPatternElement(
>         varName <- amw.getVarName(),
>             type <- aType
>     ),
> --    -- creates a new model element because it may have repeated 
> elements   
>     aType : ATL!OclModelElement (
>         name <- thisModule.getLeftInstance(amw.element.ref).name,
>         model <- 
> thisModule.resolveTemp(AMW!InModelRef.allInstancesFrom('IN')->select ( e 
> | true)->first(),'ametamodel')
>     )       
> }
> -----------------------------------------------------------
>
> to 'my rule':
>
> ------------------------------------------------------------
> rule InPatternElement {
> from --elements of a model -- source Element
>         amw: AMW!InputElement    
> to
>     atl: ATL!InPattern (
>         elements <- element,
>         filter <- 'true'.inject('OUT', 'ebnf2', 
> 'ATL-oclExpression')                        -- this is where the two 
> rules differ
>     ),
>     element : ATL!SimpleInPatternElement(
>         varName <- amw.getVarName(),
>         type <- aType
>     ),
> --    -- creates a new model element because it may have repeated 
> elements   
>     aType : ATL!OclModelElement (
>         name <- thisModule.getLeftInstance(amw.element.ref).name,
>         model <- 
> thisModule.resolveTemp(AMW!InModelRef.allInstancesFrom('IN')->select ( e 
> | true)->first(),'ametamodel')
>         )       
> }
>
> --------------------------------------------------------   
>
>
> Can anyone explain me why the injection does not work and how can I 
> resolve this problem?
>
> Thanks, Ivano
>
>
> The stack trace of the exception is:
>
>
> GRAVE: ****** BEGIN Stack Trace
> GRAVE:     exception: GRAVE: null
> java.lang.reflect.InvocationTargetException
>     at sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
>     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>     at java.lang.reflect.Method.invoke(Unknown Source)
>     at 
> org.eclipse.m2m.atl.engine.vm.ClassNativeOperation.exec(ClassNativeOperation.java:59) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:133) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:91)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:230)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:161)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:133) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:91)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:230)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:325)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:161)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:133) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:91)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:230)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:161)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMInterpreter.<init>(ASMInterpreter.java:289) 
>
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:161)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:105)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:81)
>     at 
> org.eclipse.gmt.weaver.transformation.util.TransformationUtil.executeTransfo(TransformationUtil.java:103) 
>
>     at 
> org.eclipse.gmt.weaver.transformation.panel.TransformationWeavingPanel$TAction.run(TransformationWeavingPanel.java:181) 
>
>     at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
>     at 
> org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545) 
>
>     at 
> org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490) 
>
>     at 
> org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402) 
>
>     at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
>     at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
>     at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
>     at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
>     at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
>     at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
>     at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
>     at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
>     at 
> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) 
>
>     at 
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
>     at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
>     at 
> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) 
>
>     at 
> org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153) 
>
>     at 
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) 
>
>     at 
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) 
>
>     at 
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) 
>
>     at 
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) 
>
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>     at java.lang.reflect.Method.invoke(Unknown Source)
>     at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:504)
>     at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
>     at org.eclipse.equinox.launcher.Main.run(Main.java:1169)
>     at org.eclipse.equinox.launcher.Main.main(Main.java:1144)
> Caused by: java.lang.NullPointerException
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMString.inject(ASMString.java:287) 
>
>     ... 52 more
> GRAVE: A.main() : ??#27 null
> GRAVE:     local variables = {self=SimpleATLtoATL : ASMModule}
> GRAVE:     local stack = []
> GRAVE: A.__exec__() : ??#58 null
> GRAVE:     local variables = {e=TransientLink {rule = 
> 'InPatternElement', sourceElements = {amw = IN!SAcomponent}, 
> targetElements = {element = OUT!<unnamed>, aType = OUT!<notnamedyet>, 
> atl = OUT!<unnamed>}, variables = {}}, self=SimpleATLtoATL : ASMModule}
> GRAVE:     local stack = []
> GRAVE: A.__applyInPatternElement(1 : NTransientLink;) : ??#28 138:15-138:65
> GRAVE:     local variables = {atl=OUT!<unnamed>, amw=IN!SAcomponent, 
> link=TransientLink {rule = 'InPatternElement', sourceElements = {amw = 
> IN!SAcomponent}, targetElements = {element = OUT!<unnamed>, aType = 
> OUT!<notnamedyet>, atl = OUT!<unnamed>}, variables = {}}, 
> self=SimpleATLtoATL : ASMModule, aType=OUT!<notnamedyet>, 
> element=OUT!<unnamed>}
> GRAVE:     local stack = [OUT!<unnamed>, OUT!<unnamed>, SimpleATLtoATL : 
> ASMModule]
> GRAVE: NativeOperation public static 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMString.inject(org.eclipse.m2m.atl.engine.vm.StackFrame,org.eclipse.m2m.atl.engine.vm.nativelib.ASMString,org.eclipse.m2m.atl.engine.vm.nativelib.ASMString,org.eclipse.m2m.atl.engine.vm.nativelib.ASMString,org.eclipse.m2m.atl.engine.vm.nativelib.ASMString) 
>
> GRAVE:     args = ['true', 'OUT', 'ebnf2', 'ATL-oclExpression']
> GRAVE: ****** END Stack Trace
> INFO: Execution terminated due to error (see launch configuration to 
> allow continuation after errors).
> GRAVE: null
> java.lang.RuntimeException
>     at 
> org.eclipse.m2m.atl.engine.vm.SimpleDebugger.error(SimpleDebugger.java:185)
>     at 
> org.eclipse.m2m.atl.engine.vm.StackFrame.printStackTrace(StackFrame.java:85) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.StackFrame.printStackTrace(StackFrame.java:77) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.ClassNativeOperation.exec(ClassNativeOperation.java:67) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:133) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:91)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:230)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:161)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:133) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:91)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:230)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:325)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:161)
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:133) 
>
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMOclAny.invoke(ASMOclAny.java:91)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.realExec(ASMOperation.java:230)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMOperation.exec(ASMOperation.java:161)
>     at 
> org.eclipse.m2m.atl.engine.vm.ASMInterpreter.<init>(ASMInterpreter.java:289) 
>
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:161)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:105)
>     at org.eclipse.m2m.atl.engine.AtlLauncher.launch(AtlLauncher.java:81)
>     at 
> org.eclipse.gmt.weaver.transformation.util.TransformationUtil.executeTransfo(TransformationUtil.java:103) 
>
>     at 
> org.eclipse.gmt.weaver.transformation.panel.TransformationWeavingPanel$TAction.run(TransformationWeavingPanel.java:181) 
>
>     at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
>     at 
> org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545) 
>
>     at 
> org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490) 
>
>     at 
> org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402) 
>
>     at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
>     at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
>     at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
>     at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
>     at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
>     at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
>     at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
>     at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
>     at 
> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) 
>
>     at 
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
>     at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
>     at 
> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) 
>
>     at 
> org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153) 
>
>     at 
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) 
>
>     at 
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) 
>
>     at 
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) 
>
>     at 
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) 
>
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>     at java.lang.reflect.Method.invoke(Unknown Source)
>     at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:504)
>     at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
>     at org.eclipse.equinox.launcher.Main.run(Main.java:1169)
>     at org.eclipse.equinox.launcher.Main.main(Main.java:1144)
> Caused by: java.lang.reflect.InvocationTargetException
>     at sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
>     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>     at java.lang.reflect.Method.invoke(Unknown Source)
>     at 
> org.eclipse.m2m.atl.engine.vm.ClassNativeOperation.exec(ClassNativeOperation.java:59) 
>
>     ... 48 more
> Caused by: java.lang.NullPointerException
>     at 
> org.eclipse.m2m.atl.engine.vm.nativelib.ASMString.inject(ASMString.java:287) 
>
>     ... 52 more
>
>