[SunONE-JATO] Re: getModel(java.lang.Class clazz) method in ViewBean
Billy--
You can use the same technique with Class objects:
public Class VOYAGER_LOCKED_MODEL=
com.sun.cms.voyager.model.VoyagerLockedModel.class;
...
getModel(VOYAGER_LOCKED_MODEL);
Todd
-- Original Message --
From: "chubbykidd" <<a href="/group/SunONE-JATO/post?protectID=014166219007078048234218065176249063000 105238234061130234143025">bacon33@o...</a>>
Sent: Wednesday, October 23, 2002 4:57 PM
Subject: [SunONE-JATO] Re: getModel(java.lang.Class clazz) method in
ViewBean
> Thanks for the reply Craig. I'm not sure what is going on because the
> first thing I checked was the spelling and everything looks okay.
>
> I'm trying to use String constants to represent my class files so the
> app stays consistent and all developers can reference these constants
> from an interface. So basically my call to the method looks like
>
> getModel(Class.forName(VOYAGER_LOCKED_MODEL));
>
> where VOYAGER_LOCKED_MODEL =
> "com.sun.cms.voyager.model.VoyagerLockedModel";
>
> It's working for my other models, just not this one.
>
> - Billy -
>
> In <a href="/group/SunONE-JATO/post?protectID=246075234167171124217231170221059165026 048139046">SunONE-JATO@y...</a>, "Craig V. Conover" <<a href="/group/SunONE-JATO/post?protectID=219212113009229091025149066024064239039 098031046209130">craig.conover@s...</a>> wrote:
> > Billy,
> > Any method could throw a NullPointerException. That's a developer error
> > typically with misspelling a literal.
> > Make sure that your class name is spelled correctly.
> >
> > Better yet, why are you using Class.forName... ?
> > Just do this instead to get compiler time type checking, rather than
> > getting the runtime NullPointerException:
> > getModel(com.sun.cms.voyager.model.VoyagerLockedModel.class)
> >
> > Is there any particular reason you are using Class.forName and not the
> > suggested way?
> > c
> >
> >
> > chubbykidd wrote:
> >
> > >I have a method which calls the getModel(java.lang.Class clazz) method
> > >of the ViewBean class. I'm getting a NullPointerException when this
> > >method is called. The javadocs don't say anything about this method
> > >throwing an Exception. Can someone help me out on this one?
> > >
> > >My method call looks like this...
> > >
> >
> >getModel(Class.forName("com.sun.cms.voyager.model.VoyagerLockedModel"));
> > >
> > >
> > >- Billy -
> > >
> > >
> > >
> > >To download the latest version of JATO, please visit:
> > ><a href="http://www.sun.com/software/download/developer/5102.html">http://www.s un.com/software/download/developer/5102.html</a>
> > >
> > >For more information about JATO, please visit:
> > ><a href="http://developer.iplanet.com/tech/appserver/framework/index.jsp">http: //developer.iplanet.com/tech/appserver/framework/index.jsp</a>
> > >
> > >
> > >
> > >
> > >
> > >
>
>
>
> To download the latest version of JATO, please visit:
> <a href="http://www.sun.com/software/download/developer/5102.html">http://www.s un.com/software/download/developer/5102.html</a>
>
> For more information about JATO, please visit:
> <a href="http://developer.iplanet.com/tech/appserver/framework/index.jsp">http: //developer.iplanet.com/tech/appserver/framework/index.jsp</a>
>
>
>
>
>
[4238 byte] By [
Guest] at [2007-11-25 9:26:27]
Yes, I actually changed my constants to
public static final Class VOYAGER_LOCKED_MODEL =
com.sun.cms.voyager.model.VoyagerLockedModel.class; after i read
craigs e-mail. I'm still receiving the same NullPointerException
even with this change. Now that I've changed them to Class constants
they are validated at compile time so I think this rules out the
possibilty that I have a name or spelling mistake for the class,
right? Because everything is compiling fine.
- Billy -
In <a href="/group/SunONE-JATO/post?protectID=246075234167171124217231170221059165026 048139046">SunONE-JATO@y...</a>, Todd Fast <<a href="/group/SunONE-JATO/post?protectID=101233080150035167169232031248066208071 048">Todd.Fast@S...</a>> wrote:
> Billy--
>
> You can use the same technique with Class objects:
>
> public Class VOYAGER_LOCKED_MODEL=
> com.sun.cms.voyager.model.VoyagerLockedModel.class;
>
> ...
>
> getModel(VOYAGER_LOCKED_MODEL);
>
> Todd
>
> -- Original Message --
> From: "chubbykidd" <<a href="/group/SunONE-JATO/post?protectID=014166219007078048234218065036129208"&g t;bacon33@o...</a>>
> Sent: Wednesday, October 23, 2002 4:57 PM
> Subject: [SunONE-JATO] Re: getModel(java.lang.Class clazz) method
in
> ViewBean
>
>
> > Thanks for the reply Craig. I'm not sure what is going on
because the
> > first thing I checked was the spelling and everything looks okay.
> >
> > I'm trying to use String constants to represent my class files
so the
> > app stays consistent and all developers can reference these
constants
> > from an interface. So basically my call to the method looks like
> >
> > getModel(Class.forName(VOYAGER_LOCKED_MODEL));
> >
> > where VOYAGER_LOCKED_MODEL =
> > "com.sun.cms.voyager.model.VoyagerLockedModel";
> >
> > It's working for my other models, just not this one.
> >
> > - Billy -
> >
> > In <a href="/group/SunONE-JATO/post?protectID=246075234167171124217231170221059165026 048139046">SunONE-JATO@y...</a>, "Craig V. Conover" <<a href="/group/SunONE-JATO/post?protectID=219212113009229091025149066024064239039 098031046209130">craig.conover@s...</a>>
wrote:
> > > Billy,
> > > Any method could throw a NullPointerException. That's a
developer error
> > > typically with misspelling a literal.
> > > Make sure that your class name is spelled correctly.
> > >
> > > Better yet, why are you using Class.forName... ?
> > > Just do this instead to get compiler time type checking,
rather than
> > > getting the runtime NullPointerException:
> > > getModel(com.sun.cms.voyager.model.VoyagerLockedModel.class)
> > >
> > > Is there any particular reason you are using Class.forName and
not the
> > > suggested way?
> > > c
> > >
> > >
> > > chubbykidd wrote:
> > >
> > > >I have a method which calls the getModel(java.lang.Class
clazz) method
> > > >of the ViewBean class. I'm getting a NullPointerException
when this
> > > >method is called. The javadocs don't say anything about this
method
> > > >throwing an Exception. Can someone help me out on this one?
> > > >
> > > >My method call looks like this...
> > > >
> > >
> > >getModel(Class.forName
("com.sun.cms.voyager.model.VoyagerLockedModel"));
> > > >
> > > >
> > > >- Billy -
> > > >
> > > >
> > > >
> > > >To download the latest version of JATO, please visit:
> > > ><a href="http://www.sun.com/software/download/developer/5102.html">http://www.s un.com/software/download/developer/5102.html</a>
> > > >
> > > >For more information about JATO, please visit:
> > >
><a href="http://developer.iplanet.com/tech/appserver/framework/index.jsp">http: //developer.iplanet.com/tech/appserver/framework/index.jsp</a>
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> >
> >
> >
> > To download the latest version of JATO, please visit:
> > <a href="http://www.sun.com/software/download/developer/5102.html">http://www.s un.com/software/download/developer/5102.html</a>
> >
> > For more information about JATO, please visit:
> > <a href="http://developer.iplanet.com/tech/appserver/framework/index.jsp">http: //developer.iplanet.com/tech/appserver/framework/index.jsp</a>
> >
> >
> >
> >
> >
Guest at 2007-7-1 16:30:49 >
