RE: [rules-users] Rules syntax question using hashmap

From: Zevenbergen, Alex <azevenbergen(a)paddypower.com&gt; Subject: RE: [rules-users] Rules syntax question using hashmap To: greg_barton(a)yahoo.com Date: Thursday, February 26, 2009, 11:30 AM So that doesn't solve the problem of null params in the hashmap? Do you know if it is possible? Also is there a good place for rules documentation and examples as all the examples I can find are fairly simply and one-dimensional -----Original Message----- From: Greg Barton [mailto:greg_barton@yahoo.com] Sent: 26 February 2009 17:26 To: Zevenbergen, Alex Subject: RE: [rules-users] Rules syntax question using hashmap Ah. That's because drools is expecting "details" to be an object type. Rule conditions take the following form: ObjectType(property == value, anotherProperty > anotherValue, ...) So, for a condition like this... details(fact == $f, name == "END_MATCH", value == true) ...you would need a class definition like this: class details { Fact fact; String name; boolean value; } And an object of type "details" would need to be inserted into working memory for the condition to possibly match. --- On Thu, 2/26/09, Zevenbergen, Alex <azevenbergen(a)paddypower.com&gt; wrote: > From: Zevenbergen, Alex <azevenbergen(a)paddypower.com&gt; > Subject: RE: [rules-users] Rules syntax question using hashmap > To: greg_barton(a)yahoo.com, "Rules Users List" <rules-users(a)lists.jboss.org&gt; > Date: Thursday, February 26, 2009, 11:14 AM > Hi, > I get the following error: Unable to resolve ObjectType > 'details' > > I've tried different variations (getDetails etc) but > 'details is my > attribute name and doesn't seem to be picked up! > > alex > -----Original Message----- > From: rules-users-bounces(a)lists.jboss.org > [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of > Greg Barton > Sent: 26 February 2009 17:04 > To: Rules Users List > Subject: Re: [rules-users] Rules syntax question using > hashmap > > Can you provide any info on why the third option > doesn't work? > > --- On Thu, 2/26/09, Zevenbergen, Alex > <azevenbergen(a)paddypower.com&gt; > wrote: > > > From: Zevenbergen, Alex > <azevenbergen(a)paddypower.com&gt; > > Subject: [rules-users] Rules syntax question using > hashmap > > To: rules-users(a)lists.jboss.org > > Date: Thursday, February 26, 2009, 10:45 AM > > Hi all, > > > > > > > > Im using an object called 'Fact' this object > has > > one attribute that is a > > hashmap 'details' > > > > > > > > I know there are several ways to access the parameters > in > > the hashmap > > > > > > > > $f : Fact() > > > > eval > ($f.getDetails().get("END_MATCH").toString() > > == "true" && > > $f.getDetails().get("WINNER").toString() == > > "HOME") > > > > > > > > $f : Fact(details.END_MATCH == true,details.WINNER == > > "AWAY") > > > > > > > > $f : Fact() > > > > details(fact == $f, name == "END_MATCH", > value == > > true) > > > > > > > > > > > > I was told the third option works but it doesn't > for > > me! > > > > > > > > Anyway my question is: Is there anyway for these sort > of > > rules to not > > through an exception if any of the named parameters > > aren't on the > > hashmap 'details'? > > > > > > > > Ideally the rule would simply not fire if it looked > for a > > key that > > wasn't there! > > > > > > > > Any info much appreciated > > > > > > > > Alex > > > > > > > > > > > ________________________________________________________________________ > > Privileged, confidential and/or copyright information > may > > be contained in this communication. This e-mail and > any > > files transmitted with it are confidential and > intended > > solely for the use of the individual or entity to whom > they > > are addressed. If you are not the intended addressee, > you > > may not copy, forward, disclose or otherwise use this > e-mail > > or any part of it in any way whatsoever. To do so is > > prohibited and may be unlawful. If you have received > this > > email in error > > please notify the sender immediately. > > > > Paddy Power PLC may monitor the content of e-mail sent > and > > received for the purpose of ensuring compliance with > its > > policies and procedures. > > > > Paddy Power plc, Airton House, Airton Road, Tallaght, > > Dublin 24 Registered in Ireland: 16956 > > > ________________________________________________________________________ > _______________________________________________ > > rules-users mailing list > > rules-users(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/rules-users > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > ________________________________________________________________________ > Privileged, confidential and/or copyright information may > be contained in this communication. This e-mail and any > files transmitted with it are confidential and intended > solely for the use of the individual or entity to whom they > are addressed. If you are not the intended addressee, you > may not copy, forward, disclose or otherwise use this e-mail > or any part of it in any way whatsoever. To do so is > prohibited and may be unlawful. If you have received this > email in error > please notify the sender immediately. > > Paddy Power PLC may monitor the content of e-mail sent and > received for the purpose of ensuring compliance with its > policies and procedures. > > Paddy Power plc, Airton House, Airton Road, Tallaght, > Dublin 24 Registered in Ireland: 16956 > ________________________________________________________________________ ________________________________________________________________________ Privileged, confidential and/or copyright information may be contained in this communication. This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended addressee, you may not copy, forward, disclose or otherwise use this e-mail or any part of it in any way whatsoever. To do so is prohibited and may be unlawful. If you have received this email in error please notify the sender immediately. Paddy Power PLC may monitor the content of e-mail sent and received for the purpose of ensuring compliance with its policies and procedures. Paddy Power plc, Airton House, Airton Road, Tallaght, Dublin 24 Registered in Ireland: 16956 ________________________________________________________________________