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Gemoc studio execution ale
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Pb with support for @init method with multiple arguments #17

Open dvojtise opened 5 years ago

dvojtise commented 5 years ago

In Java execution engine, the launcher can use an initModel method using either a single String or a List<String>, the launcher then use the carriage return as a separator in order to provide a list of strings to the init method.

In ALE (which reuse a lot of the Java engine launcher) the tooltip on the "Model Initialization arguments" field also indicates "one line per argument" but trying to have a method 

@init
    def void initializeModel(Sequence(String) input) {
        ('hello from initializeModel').log();
        ('input='+input+' - '+input.eClass()+' - ').log();
        for(inp in input){
            ('input line='+inp).log();
        }
        /// more stuff
    }

fails with a 

hello from initializeModel
input=aa bb cc -  - 
java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Collection
    at org.eclipse.emf.ecoretools.ale.core.interpreter.MethodEvaluator.caseForEach(MethodEvaluator.java:306)
    at org.eclipse.emf.ecoretools.ale.implementation.util.ImplementationSwitch.doSwitch(ImplementationSwitch.java:225)
    at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
    at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
    at org.eclipse.emf.ecoretools.ale.core.interpreter.MethodEvaluator.lambda$0(MethodEvaluator.java:116)
    at java.util.Iterator.forEachRemaining(Iterator.java:116)
    at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
    at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
    at org.eclipse.emf.ecoretools.ale.core.interpreter.MethodEvaluator.caseBlock(MethodEvaluator.java:116)
    at org.eclipse.emf.ecoretools.ale.implementation.util.ImplementationSwitch.doSwitch(ImplementationSwitch.java:143)
    at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
    at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
    at org.eclipse.emf.ecoretools.ale.core.interpreter.MethodEvaluator.eval(MethodEvaluator.java:91)
    at org.eclipse.emf.ecoretools.ale.core.interpreter.ALEEngine.eval(ALEEngine.java:30)
    at org.eclipse.emf.ecoretools.ale.ALEInterpreter.doEval(ALEInterpreter.java:299)
    at org.eclipse.emf.ecoretools.ale.ALEInterpreter.eval(ALEInterpreter.java:234)
    at org.eclipse.gemoc.ale.interpreted.engine.AleEngine.initializeModel(AleEngine.java:144)

also notice that in the message, the input.eClass() does not print any information about the current type of the argument "input" (probably another bug ?)

dvojtise commented 5 years ago

(for the above trace, the arguments passed in the launcher dialog were:

aa bb cc
dd ee ff
gg hh ii

)