5:17 p.m.
Hello,
when I run the code
rule "sample1"
when
$P: User( $nam : name, userId == "10", email matches
".*(a)yahoo.fr")
$role :Role($name : name, $users: users)
then
System.out.println($P.getname());
end
there 's nothing affiched the portion RHS didn't execute
but when I remove
$role :Role($name : name, $users: users)
the result waited is affiched
but I don't remove it and I want the portion RHS execute
Marko Frankovic <paparapap(a)gmail.com> a écrit : Try this out :
http://sourceforge.net/projects/droolsruleedit . It's in early development stage, but
it might help you.
On 4/5/07, John.Tal(a)gxs.com <John.Tal(a)gxs.com> wrote: Drools developers,
In our specific use case we have customers who need to be able to write validation rules
and NOT have to resort to writing them in Java. Hence our interest in using drools as an
open source 'standard' to potentially replace a proprietary rules engine we
already have.
In the previous case I mentioned where I want to do this:
*rule* "UCCnet_DVE_Depth_All"
*when*
catalogObject : CatalogObject( )
String s = catalogObject.getElementValue("depth");
*eval*( s == *null* || s == "" )
*then*
logWriter.logDebug("Package Depth is Blank");
*end*
This is because potentially, in our use for data validation, there might be 50 values we
need to compare against. Those values need to be on the drools (not java) side of the
world. So getting the result of catalogObject.getElementValue("depth") into a
String variable and being able to use String methods like indexOf or multiple || cases is
much more desirable than crossing from the rule back into the object by having to call
getElementValue 50 times. There are numerous, other cases, where the result of
catalogObject.getElementValue need to be saved into a local drools variable and evaluated
multiple times without encurring the overhead of multiple calls back into java.
Please consider enhancing drl syntax to support this use case. Is there a bug/enhancement
process for me to follow to submit this functionality request.
Thanks
John
Date: Thu, 5 Apr 2007 16:47:07 +1000
From: "Michael Neale" < michael.neale(a)gmail.com>
Subject: Re: [rules-users] RE: Need DRL authoring Help
To: "Rules Users List" < rules-users(a)lists.jboss.org>
Message-ID:
< 96ab3ced0704042347s130a4b46ma4a5b74fb45ef0d4(a)mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
OK you are really bending what you would use rules for, I really wouldn't recommend
that. flattening the object model would allow you to write rules over it, but as it
stands, its just going to be a bit difficult for you.
catalogObject : CatalogObject( )
*eval*( catalogObject.getElementValue("depth") == *null* ||
catalogObject.getElementValue ("depth") == "" )
On 4/5/07, John.Tal(a)gxs.com <John.Tal(a)gxs.com> wrote:
>
> Ok, Thanks for the help on the drl syntax.
>
> So this works.
>
> *rule* "UCCnet_DVE_Depth_All"
> *when*
> catalogObject : CatalogObject( )
> *eval*( catalogObject.getElementValue("depth") == *null* ||
> catalogObject.getElementValue("depth") == "" )
> *then*
> logWriter.logDebug("Package Depth is Blank");
> *end*
>
> But how do I get the drl parser to accept something like this:
>
*rule* "UCCnet_DVE_Depth_All"
*when*
catalogObject : CatalogObject( )
String s = catalogObject.getElementValue("depth");
*eval*( s == *null* || s == "" )
*then*
logWriter.logDebug("Package Depth is Blank");
*end*
>
> I am getting an Unexpected token 's' InvalidRulePackage
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