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Posted to dev@tuscany.apache.org by Simon Nash <na...@hursley.ibm.com> on 2006/10/12 22:11:29 UTC

Error running sample in Java SDO M2 RC3

I'm getting a NullPointerException from the UsingXPath sample in SDO M2 RC3.
Here's the output from the sample with some debug code that I added to
print the exception and stack trace:

***************************************
SDO Sample UsingXPath
***************************************
Demonstrats accessing a created DataObject's properties using xPath.
***************************************
DataObject created
Accessing individual item from list using xpath expressionitems/item[1]
     DataObject toString : org.apache.tuscany.sdo.impl.DynamicDataObjectImpl@33f0de
         (eClass: org.apache.tuscany.sdo.impl.ClassImpl@68c26c (name: item) (instanceClassName: null)
         (abstract: false, interface: false))
     Item name:Lawnmower
     Part num: 872-AA
Accessing individual item from list using xpath expressionitems/item[productName=Baby Monitor]
     Sorry there was an error executing expression items/item[productName=Baby Monitor]
java.lang.NullPointerException
         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.setFeatureName(DataObjectUtil.java:2054)
         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.process(DataObjectUtil.java:2161)
         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.init(DataObjectUtil.java:1940)
         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.create(DataObjectUtil.java:1860)
         at org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:744)
         at org.apache.tuscany.sdo.impl.DataObjectImpl.get(DataObjectImpl.java:216)
         at org.apache.tuscany.sdo.impl.DataObjectImpl.getDataObject(DataObjectImpl.java:326)
         at org.apache.tuscany.samples.sdo.specCodeSnippets.UsingXPath.accessDataObjectUsingXPath(UsingXPath.java:94)
         at org.apache.tuscany.samples.sdo.specCodeSnippets.UsingXPath.main(UsingXPath.java:140)
         at org.apache.tuscany.samples.sdo.ExecuteSamples.main(ExecuteSamples.java:123)
GoodBye

   Simon

kelvin goodson wrote:

> I have put a new release candidate for SDO Java up at
> http://people.apache.org/~kelvingoodson/sdo_java/RC3/
> 
> This tries to take into account the comments that the sample distribution
> does not need to be stand alone, and that
> javadoc should be shipped with the binary and sample distributions.
> 
> I have been fighting with the maven build environment to produce a good set
> of javadoc as part of the build, from a user's
> perspective,  but that's not at all easy given the structure of our 
> projects
> and the nature of the maven javadoc plugin,
> so currently the binary distribution carries  javadoc for  the sdo api and
> all of the tuscany implementation.  The README file
> draws the attention of  an SDO  user to relevant classes in the  tuscany
> implementation javadoc.
> 
> Regards, Kelvin.
> 


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Re: Error running sample in Java SDO M2 RC3

Posted by kelvin goodson <ke...@gmail.com>.

Oops,  not sure how that crept through.  I started making a test case that
ran all the samples, to make sure this kind of thing doesn't happen,  but it
wasn't trivial because the samples are so interactive.  It would be good to
make a non-interactive option on them, so that we can run them as the test
suite of the samples project, then we wouldn't miss this kind of thing.  For
now I will document that the release process should include running the
samples as well as the tests,  which I ususaly do,  but omited to do for
RC3.

Apologies, Kelvin.


On 12/10/06, Simon Nash <na...@hursley.ibm.com> wrote:
>
> I'm getting a NullPointerException from the UsingXPath sample in SDO M2
> RC3.
> Here's the output from the sample with some debug code that I added to
> print the exception and stack trace:
>
> ***************************************
> SDO Sample UsingXPath
> ***************************************
> Demonstrats accessing a created DataObject's properties using xPath.
> ***************************************
> DataObject created
> Accessing individual item from list using xpath expressionitems/item[1]
>     DataObject toString :
> org.apache.tuscany.sdo.impl.DynamicDataObjectImpl@33f0de
>         (eClass: org.apache.tuscany.sdo.impl.ClassImpl@68c26c (name: item)
> (instanceClassName: null)
>         (abstract: false, interface: false))
>     Item name:Lawnmower
>     Part num: 872-AA
> Accessing individual item from list using xpath
> expressionitems/item[productName=Baby Monitor]
>     Sorry there was an error executing expression
> items/item[productName=Baby Monitor]
> java.lang.NullPointerException
>         at
> org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.setFeatureName(
> DataObjectUtil.java:2054)
>         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.process(
> DataObjectUtil.java:2161)
>         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.init(
> DataObjectUtil.java:1940)
>         at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.create(
> DataObjectUtil.java:1860)
>         at org.apache.tuscany.sdo.util.DataObjectUtil.get(
> DataObjectUtil.java:744)
>         at org.apache.tuscany.sdo.impl.DataObjectImpl.get(
> DataObjectImpl.java:216)
>         at org.apache.tuscany.sdo.impl.DataObjectImpl.getDataObject(
> DataObjectImpl.java:326)
>         at
> org.apache.tuscany.samples.sdo.specCodeSnippets.UsingXPath.accessDataObjectUsingXPath
> (UsingXPath.java:94)
>         at org.apache.tuscany.samples.sdo.specCodeSnippets.UsingXPath.main
> (UsingXPath.java:140)
>         at org.apache.tuscany.samples.sdo.ExecuteSamples.main(
> ExecuteSamples.java:123)
> GoodBye
>
>   Simon
>
> kelvin goodson wrote:
>
> > I have put a new release candidate for SDO Java up at
> > http://people.apache.org/~kelvingoodson/sdo_java/RC3/
> >
> > This tries to take into account the comments that the sample
> distribution
> > does not need to be stand alone, and that
> > javadoc should be shipped with the binary and sample distributions.
> >
> > I have been fighting with the maven build environment to produce a good
> set
> > of javadoc as part of the build, from a user's
> > perspective,  but that's not at all easy given the structure of our
> > projects
> > and the nature of the maven javadoc plugin,
> > so currently the binary distribution carries  javadoc for  the sdo api
> and
> > all of the tuscany implementation.  The README file
> > draws the attention of  an SDO  user to relevant classes in the  tuscany
> > implementation javadoc.
> >
> > Regards, Kelvin.
> >
>
>
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> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
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>