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Posted to user@commons.apache.org by Rob Walker <ro...@ascert.com> on 2003/08/04 15:16:07 UTC
JXPATH - naming oddity when using with JAX-B
Have to say, I'm very much liking the look of combining JAX-B for object
marshalling/unmarshalling and JXPATH for in memory object graph search.
One oddity I noticed:
I have a List containing classes of type PackagedDriverImpl, which itself
implements an interface PackagedDriver.
This class has a getDriverDescriptor method, which returns an object of
x.y.z.DriverDescriptor based on the the JAX-B generated schema.
My original JXPath search went along the following lines:
DriverDescriptor/Info/Driver[@Id='xxx.yyy']
This failed, and running it through debug I noticed that the leading capital
letter of all my properties had been shifted to lower case. So, redoing my
search as follows worked:
driverDescriptor/info/driver[@id='xxx.yyy']
Seemed a little odd. Anyone got any suggestions/advice on this?
TIA
-- Rob Walker
Ascert - Taking systems to the Edge
robw@ascert.com
+44 (0)20 7488 3470
www.Ascert.com
Re: JXPATH - naming oddity when using with JAX-B
Posted by Dmitri Plotnikov <dp...@yahoo.com>.
Yes, it's just the first letter.
- Dmitri
--- Rob Walker <ro...@ascert.com> wrote:
> Dmitri
>
> Thanks for the info, have to say I'd not picked that up from the
> JavaBeans
> spec.
>
> Since under this scheme:
>
> "DriverDescriptor" becomes "driverDescriptor"
>
> Can I take it that the decapitalization only happens for the first
> "word" or
> "letter"?
>
> -- Rob
>
> Send reply to: "Jakarta Commons Users List"
> <co...@jakarta.apache.org>
> Date sent: Mon, 4 Aug 2003 07:04:46 -0700 (PDT)
> From: Dmitri Plotnikov <dp...@yahoo.com>
> Send reply to: dmitri@apache.org
> Subject: Re: JXPATH - naming oddity when using with JAX-B
> To: Jakarta Commons Users List
> <co...@jakarta.apache.org>
>
> > Rob,
> >
> > When working with in-memory objects, JXPath relies on the JavaBean
> > specification, which prescribes a certain way of capitalizing
> property
> > names. Specifically, we remove the "get" prefix from the method
> name
> > and de-capitalize the rest, unless it begins with two or more
> capital
> > letters. For instance, "getFoo" becomes "foo", getFOO() becomes
> "FOO".
> >
> > - Dmitri
> >
> >
> > --- Rob Walker <ro...@ascert.com> wrote:
> > > Have to say, I'm very much liking the look of combining JAX-B for
> > > object
> > > marshalling/unmarshalling and JXPATH for in memory object graph
> > > search.
> > >
> > > One oddity I noticed:
> > >
> > > I have a List containing classes of type PackagedDriverImpl,
> which
> > > itself
> > > implements an interface PackagedDriver.
> > >
> > > This class has a getDriverDescriptor method, which returns an
> object
> > > of
> > > x.y.z.DriverDescriptor based on the the JAX-B generated schema.
> > >
> > > My original JXPath search went along the following lines:
> > >
> > > DriverDescriptor/Info/Driver[@Id='xxx.yyy']
> > >
> > > This failed, and running it through debug I noticed that the
> leading
> > > capital
> > > letter of all my properties had been shifted to lower case. So,
> > > redoing my
> > > search as follows worked:
> > >
> > > driverDescriptor/info/driver[@id='xxx.yyy']
> > >
> > > Seemed a little odd. Anyone got any suggestions/advice on this?
> > >
> > > TIA
> > >
> > > -- Rob Walker
> > >
> > >
> > > Ascert - Taking systems to the Edge
> > > robw@ascert.com
> > > +44 (0)20 7488 3470
> > > www.Ascert.com
> > >
> > >
> > >
> > >
> ---------------------------------------------------------------------
> > > To unsubscribe, e-mail:
> commons-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail:
> commons-user-help@jakarta.apache.org
> > >
> >
> >
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> ---------------------------------------------------------------------
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> > For additional commands, e-mail:
> commons-user-help@jakarta.apache.org
> >
>
>
>
> Ascert - Taking systems to the Edge
> robw@ascert.com
> +44 (0)20 7488 3470
> www.Ascert.com
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: commons-user-help@jakarta.apache.org
>
__________________________________
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Re: JXPATH - naming oddity when using with JAX-B
Posted by Rob Walker <ro...@ascert.com>.
Dmitri
Thanks for the info, have to say I'd not picked that up from the JavaBeans
spec.
Since under this scheme:
"DriverDescriptor" becomes "driverDescriptor"
Can I take it that the decapitalization only happens for the first "word" or
"letter"?
-- Rob
Send reply to: "Jakarta Commons Users List" <co...@jakarta.apache.org>
Date sent: Mon, 4 Aug 2003 07:04:46 -0700 (PDT)
From: Dmitri Plotnikov <dp...@yahoo.com>
Send reply to: dmitri@apache.org
Subject: Re: JXPATH - naming oddity when using with JAX-B
To: Jakarta Commons Users List <co...@jakarta.apache.org>
> Rob,
>
> When working with in-memory objects, JXPath relies on the JavaBean
> specification, which prescribes a certain way of capitalizing property
> names. Specifically, we remove the "get" prefix from the method name
> and de-capitalize the rest, unless it begins with two or more capital
> letters. For instance, "getFoo" becomes "foo", getFOO() becomes "FOO".
>
> - Dmitri
>
>
> --- Rob Walker <ro...@ascert.com> wrote:
> > Have to say, I'm very much liking the look of combining JAX-B for
> > object
> > marshalling/unmarshalling and JXPATH for in memory object graph
> > search.
> >
> > One oddity I noticed:
> >
> > I have a List containing classes of type PackagedDriverImpl, which
> > itself
> > implements an interface PackagedDriver.
> >
> > This class has a getDriverDescriptor method, which returns an object
> > of
> > x.y.z.DriverDescriptor based on the the JAX-B generated schema.
> >
> > My original JXPath search went along the following lines:
> >
> > DriverDescriptor/Info/Driver[@Id='xxx.yyy']
> >
> > This failed, and running it through debug I noticed that the leading
> > capital
> > letter of all my properties had been shifted to lower case. So,
> > redoing my
> > search as follows worked:
> >
> > driverDescriptor/info/driver[@id='xxx.yyy']
> >
> > Seemed a little odd. Anyone got any suggestions/advice on this?
> >
> > TIA
> >
> > -- Rob Walker
> >
> >
> > Ascert - Taking systems to the Edge
> > robw@ascert.com
> > +44 (0)20 7488 3470
> > www.Ascert.com
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: commons-user-help@jakarta.apache.org
> >
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free, easy-to-use web site design software
> http://sitebuilder.yahoo.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: commons-user-help@jakarta.apache.org
>
Ascert - Taking systems to the Edge
robw@ascert.com
+44 (0)20 7488 3470
www.Ascert.com
Re: JXPATH - naming oddity when using with JAX-B
Posted by Dmitri Plotnikov <dp...@yahoo.com>.
Rob,
When working with in-memory objects, JXPath relies on the JavaBean
specification, which prescribes a certain way of capitalizing property
names. Specifically, we remove the "get" prefix from the method name
and de-capitalize the rest, unless it begins with two or more capital
letters. For instance, "getFoo" becomes "foo", getFOO() becomes "FOO".
- Dmitri
--- Rob Walker <ro...@ascert.com> wrote:
> Have to say, I'm very much liking the look of combining JAX-B for
> object
> marshalling/unmarshalling and JXPATH for in memory object graph
> search.
>
> One oddity I noticed:
>
> I have a List containing classes of type PackagedDriverImpl, which
> itself
> implements an interface PackagedDriver.
>
> This class has a getDriverDescriptor method, which returns an object
> of
> x.y.z.DriverDescriptor based on the the JAX-B generated schema.
>
> My original JXPath search went along the following lines:
>
> DriverDescriptor/Info/Driver[@Id='xxx.yyy']
>
> This failed, and running it through debug I noticed that the leading
> capital
> letter of all my properties had been shifted to lower case. So,
> redoing my
> search as follows worked:
>
> driverDescriptor/info/driver[@id='xxx.yyy']
>
> Seemed a little odd. Anyone got any suggestions/advice on this?
>
> TIA
>
> -- Rob Walker
>
>
> Ascert - Taking systems to the Edge
> robw@ascert.com
> +44 (0)20 7488 3470
> www.Ascert.com
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: commons-user-help@jakarta.apache.org
>
__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com