RV: [rules-users] Checking an xml field

Tue Oct 7 12:37:15 EDT 2008

Hi Zaola,

I may not be right, but I can think of one solution :

 when
                        OASISTSO10($e: EVENT)
                        EVENT($g: GEO)
                        OASISTSO10(eval($e.GEO.size >0), )
Then
Assert something

When
    $e.GEO[0].POSITION.LOCID matches  "40.*")
Then
.....do something else

Not sure if you can combine it all in one statement....

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Otaduy del Paso, Zaloa
Sent: Tuesday, October 07, 2008 8:53 PM
To: Rules Users List
Subject: RE: RV: [rules-users] Checking an xml field

Hi David,

Thanks for your helpful response. The problem was that the element GEO can appear 0 or many times so what I needed to write was this

when
                        OASISTSO10($e: EVENT)
                        OASISTSO10($e.GEO[0].POSITION.LOCID == "40005")
            Then
                        Action

instead of
            when
                        OASISTSO10($e: EVENT)
                        OASISTSO10($e.GEO.POSITION.LOCID == "40005")
            Then
                        Action

Now I'm facing another problem. I need to check if the element GEO exists before checking the POSITION, otherwise it throws an outofbound exception.
I tried with:

 when
                        OASISTSO10($e: EVENT)
                        EVENT($g: GEO)
                        OASISTSO10($e.GEO[0].POSITION.LOCID matches  "40.*")

But it doesn't work. Any hints on this?

Thanks in advance,
Zaloa Otaduy del Paso
________________________________
De: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] En nombre de David Sinclair
Enviado el: martes, 07 de octubre de 2008 15:58
Para: Rules Users List
Asunto: Re: RV: [rules-users] Checking an xml field

Read the manual man. Your rules don't make any sense

http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/html_single/
On Tue, Oct 7, 2008 at 9:49 AM, Scott Reed <sreed at avacoda.com<mailto:sreed at avacoda.com>> wrote:
What is the problem you are seeing? Do the rules compile ok?

Otaduy del Paso, Zaloa [10/6/2008 12:08 PM] wrote:

Does anybody know the answer to my question? I'm not able to solve this issue and don't find any clarifying tutorial either....

Hi,

I'm new in drools and I'm having some problems accessing an xml field. I'm using drools with jaxb to treat xml files that follow an specific xsd. I have the following xml (this is just a piece of the xml):

<OASIS_TSO_1_0>

      <EVENT>

<EVENT_ID>EVENT_ID_03/10/2008 10:22:36</EVENT_ID>

<NODE_ID>00</NODE_ID>

<OTHER_EVENT_ID>Incidente UME</OTHER_EVENT_ID>

<EVENT_TYPE>POL</EVENT_TYPE>

<SOURCE>HUMDED</SOURCE>

<SEVERITY>EXTREM</SEVERITY>

<CERTAINTY>88</CERTAINTY>

<DECL_DATIME>2008-10-03T10:20:47.0000000+02:00</DECL_DATIME>

<GEO>

<DESCRIPTION/>

<POSITION>

<LOC_ID>14021</LOC_ID>

<COORD>

<LAT>37.9811636567434</LAT>

<LON>-4.85417587343286</LON>

<HEIGHT>0</HEIGHT>

</COORD>

</POSITION>

</GEO>

     </EVENT>

</OASIS_TSO_1_0>

I already have a couple of rules working, but they are simple rules, like this one:

rule "Rule1"

    salience 10

when

                        OASISTSO10($e: EVENT)

OASISTSO10($e.SEVERITY == "EXTREM") or OASISTSO10($e.SEVERITY == "SEVERE")

            then

                        action

The problem appears when I have to check the LOC_ID field and I don't know how to access to it. I have tried several things but none of them work

1.

            when

OASISTSO10($e: EVENT)

                        OASISTSO10($e.GEO.POSITION.LOCID == "40005")

            then

2.

            when

OASISTSO10($e: EVENT)

OASISTSO10($g: $e.GEO)

                        OASISTSO10($p: $g.POSITION)

                        OASISTSO10($p.LOCID  == "40005")

            Then

I have also tried with ($e.GEO.POSITION.DESCRIPTION, just in case the "_" character was the problem. But the same results... I have searched also for examples with xmls but I haven't had luck.

Any help would be appreciated. Thanks in advance,

Zaloa

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