[rules-users] mvel regex not working???

[Edson Tirelli]

   Len,

   When you use code inside eval(), it is executed in the chosen dialect
(default is java). So, the regexp of your first rule is parsed and executed
in java and is correct.
   When you use code outside eval(), it is parsed by the Drools parser and
the drools parser do not require the extra '\' to escape escape-codes. See
the examples bellow:

java: "^[a-zA-Z0-9\\!\\#\\$\\%\\&]"
equivalent drools regexp: "^[a-zA-Z0-9\!\#\$\%\&]"

   If you change your regexp to use single '\' instead of double, it should
work fine.

    []s
    Edson

2007/11/14, Carlsen, Len <len.carlsen at ubc.ca>:
>
>  Hi,
>
>
>
> I have an email validation regex where the mvel matches doesn't seem to
> work. I have created 2 rules where test1 uses the Java String matches and
> test2 uses the mvel matches. Test1 works but test2 doesn't. I am using
> Drools 4.0.3 and JDK 1.6.0_02.
>
>
>
> *rule* "Test1"
>
>     *when*
>
>         // This works
>
>         email : String()
>
>         *eval*( !email.*matches*(
> "^[a-zA-Z0-9\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\|\\}\\~]+(\\.[a-zA-Z0-9\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\|\\}\\~]+)*@[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*\\.[a-zA-Z]{2,6}$") )
>
>     *then*
>
>         System.out.println( "1-Invalid Email Address: " + email );
>
> *end*
>
>
>
> *rule* "Test2"
>
>     *when*
>
>         // This doesn't work
>
>         email : String( toString *not* *matches*
> "^[a-zA-Z0-9\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\|\\}\\~]+(\\.[a-zA-Z0-9\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\|\\}\\~]+)*@[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*\\.[a-zA-Z]{2,6}$")
>
>     *then*
>
>         System.out.println( "2-Invalid Email Address: " + email );
>
> *end*
>
>
>
> Here's the output using email addresses x.x at x.com (valid) and x.xx.com
> (invalid):
>
>
>
> test1-Invalid Email Address: x.xx.com
>
> test2-Invalid Email Address: x.x at x.com
>
> test2-Invalid Email Address: x.xx.com
>
>
>
> The regex expressions are exactly the same. Am I doing something wrong
> here?
>
>
>
> Thanks,
>
>
>
> Len
>
>
>
> _______________________________________________
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> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>


-- 
  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com
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