RE: Problem in the function resolution phase

Hello Patrick. How are you?

  I have faced this problem when I have tried to parse a component to get its
ComponentDescription. I do not know another way to get the
ComponentDescription after the component is running. So, as I need the
ComponentDescription to redeploy a component on a remote machine, I have
developed the util paserDescription method below:	

public static ComponentDescription parseDescription (InputStream stream)
throws RemoteException, SmartFrogException, FileNotFoundException {
		Phases phases = new SFParser().sfParse(stream);
		
		/* Resolving the phases. We don't resolve the 'sfConfig' phase because
		 * it isn't a deployable component.
		 */ 
		phases.sfResolvePhase("type");
		phases.sfResolvePhase("place");
		phases.sfResolvePhase("link");
		phases.sfResolvePhase("function");
		
		return phases.sfAsComponentDescription();		
	}	


To test it, I have developed a simple component to be parsed:

#include "org/smartfrog/components.sf"
#include "org/smartfrog/functions.sf"

Teste1 extends {
	sfClass "org.ourgrid.serviceprofile.teste.TesteImpl";
}

sfConfig extends Compound {
	teste1 extends Teste1;
}

I have noticed that the problem is the inclusion of the functions.sf file.
Even if you don't use any function in the function.sf file, the problem will
occur.

  Am I right?

   Cheers,

    Gustavo

ps.: The stacktrace of the error is below:

SmartFrogCompileResolutionException:: java.lang.NullPointerException,
resolutionPhase: function
	at
org.smartfrog.sfcore.languages.sf.SmartFrogCompileResolutionException.forward(SmartFrogCompileResolutionException.java:294)
	at
org.smartfrog.sfcore.languages.sf.sfcomponentdescription.SFComponentDescriptionImpl.sfResolvePhases(SFComponentDescriptionImpl.java:662)
	at
org.smartfrog.sfcore.languages.sf.sfcomponentdescription.SFComponentDescriptionImpl.sfResolvePhase(SFComponentDescriptionImpl.java:621)
	at org.ourgrid.serviceprofile.util.Util.parseDescription(Util.java:328)
	at
org.ourgrid.serviceprofile.util.UtilTest.testGetUndoComponent(UtilTest.java:254)
	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 junit.framework.TestCase.runTest(TestCase.java:154)
	at junit.framework.TestCase.runBare(TestCase.java:127)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:118)
	at junit.framework.TestSuite.runTest(TestSuite.java:208)
	at junit.framework.TestSuite.run(TestSuite.java:203)
	at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
	at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
	at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.NullPointerException
	at java.util.Hashtable.put(Unknown Source)
	at
org.smartfrog.sfcore.common.OrderedHashtable.primPut(OrderedHashtable.java:170)
	at org.smartfrog.sfcore.common.OrderedHashtable.put(OrderedHashtable.java:182)
	at
org.smartfrog.sfcore.languages.sf.functions.BaseFunction.doit(BaseFunction.java:63)
	at org.smartfrog.sfcore.languages.sf.Phase.actOn(Phase.java:97)
	at
org.smartfrog.sfcore.componentdescription.ComponentDescriptionImpl.visit(ComponentDescriptionImpl.java:604)
	at
org.smartfrog.sfcore.componentdescription.ComponentDescriptionImpl.visit(ComponentDescriptionImpl.java:599)
	at
org.smartfrog.sfcore.languages.sf.sfcomponentdescription.SFComponentDescriptionImpl.sfResolvePhases(SFComponentDescriptionImpl.java:659)
	... 18 more



On Thu, 3 Nov 2005 22:17:55 -0000, Goldsack, Patrick wrote
> Gustavo,
> 
> Thanks for pointing this out. I wonder how this slipped through - it 
> must have been sitting there for ages without anyone noticing. The 
> correct function for adding its attributes is sum, not plus. The 
> definition of plus should probably be removed, or made to point to 
> the class Sum for possible backward compatability. I will consider 
> this and fix...
> 
> I am somewhat surprised that unless you actually try to use it you 
> get an error (or if you try to include the file directly into 
> sfConfig). Only the functions used within sfConfig should be 
> evaulated, so a file included at the top level will be ignored.
> 
> Eliminating the function phase enirely will of course remove the 
> problem, but I wouldn't recommend it!
> 
> Can you send me some more details as to why you are getting the 
> error message?  The file you are parsing would do.
> 
> Thanks
> Patrick
> 
> -----Original Message-----
> From: smartfrog-developer-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org 
> [mailto:smartfrog-developer-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org] On Behalf 
> Of Gustavo Wagner D Mendes / Pos. COPIN Sent: 03 November 2005 21:49 
> To: smartfrog-developer-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Subject: [Smartfrog-
> developer] Problem in the function resolution phase
> 
> Hello all.
> 
> In the org/smartfrog/functions.sf file there is the following component:
> 
> plus extends {
>     phase.function 
> "org.smartfrog.sfcore.languages.sf.functions.Plus"; }
> 
> Note that it links to the
> org/smartfrog/sfcore/languages/sf/functions/Plus.class class, but it 
> does not exists in any smartfrog distribution. If we try to parse 
> any component, in the function phase occurs a ClassNotFoundException.
> 
> When I comment the function phase -
>  //phases.sfResolvePhase("function");, it works well.
> 
> If you dont have the Plus class, I can do it and send to you.
> 
>   Cheers,
> 
>      Gustavo
> 
>                 #############################################
>                 #       GUSTAVO WAGNER DINIZ MENDES         #
>                 #       Graduado pela UFCG                  #
>                 #       Curso: Ciência da Computação        #
>                 #       Mestrando pela COPIN-UFCG           #
>                 #     * Integrante do projeto OurGrid       #
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                #############################################
                #       GUSTAVO WAGNER DINIZ MENDES         #
                #       Graduado pela UFCG                  #
                #       Curso: Ciência da Computação        #
                #       Mestrando pela COPIN-UFCG           #
                #     * Integrante do projeto OurGrid       #
                #        Fones: (83)88246910 / 32358355     #
                #                   33333453                #



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Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php