Eclipse Community Forums: OCL » Null pointer exception while parsing file

Help

Home

Home » Modeling » OCL » Null pointer exception while parsing file

Show: Today's Messages :: Show Polls :: Message Navigator

Null pointer exception while parsing file [message #16998]

Thu, 12 April 2007 09:08

Youmm P.

Messages: 140
Registered: July 2009

Senior Member

Hello,

I was trying to parse this file

"context Fruit::myMethod() : MyObject
pre
cond1: true = true
"

but in a method class context (in fact I'm not sure if it's possible...):

"context myMethod() : MyObject
pre
cond1: true = true
"

however with the last file I get a null pointer exception. A parser
exception would be nicer :)

Perhaps I made some mistakes in the source code, you can find it here :

http://rafb.net/p/K29acM86.html

Report message to a moderator

Re: Null pointer exception while parsing file [message #17090 is a reply to message #16998]

Thu, 12 April 2007 16:15

Eclipse User

Originally posted by: cdamus.ca.ibm.com

Hi, Youmm,

Comments in-line, below.

HTH,

Christian

Youmm P. wrote:

> Hello,
>
> I was trying to parse this file
>
> "context Fruit::myMethod() : MyObject
> pre
> cond1: true = true
> "

This is the correct form of an operation precondition constraint.

> but in a method class context (in fact I'm not sure if it's possible...):
>
> "context myMethod() : MyObject
> pre
> cond1: true = true
> "

This is not a valid operation context; the operation must be qualified with
a classifier name as in your first example.

> however with the last file I get a null pointer exception. A parser
> exception would be nicer :)

Yes, a parse exception would be nicer than an NPE. Would you mind raising a
bug with the details? (OCL text and stack trace)

https://bugs.eclipse.org/bugs/enter_bug.cgi?product=MDT& version=1.1.0&component=OCL

> Perhaps I made some mistakes in the source code, you can find it here :
>
> http://rafb.net/p/K29acM86.html

Report message to a moderator