The instantiation is done automatically, based on configuration or API call. More details in here: http://blog.athico.com/2010/06/creating-pluggable-oprators.html But basically, for eclipse to pick it up, best to add to a configuration file: drools.evaluator.MyIdentifierForMyOperators = my.pkg.MyEvaluatorDefinition Please note that all drools operators are implemented like that and wired through configuration file as seen here: https://svn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler/src/main/resources/META-INF/drools.default.packagebuilder.conf So, adding your own custom operators is no different. Just define your own configuration file in the META-INF directory of your application package and it will work. Edson 2010/10/25 Swindells, Thomas <TSwindells@nds.com>:For that to work the class also needs to be instantiated - ie it would only get created once something in eclipse has touched the class. Thomas-----Original Message----- From: rules-users-bounces@lists.jboss.org [mailto:rules-users- bounces@lists.jboss.org] On Behalf Of Edson Tirelli Sent: 25 October 2010 14:58 To: Rules Users List Subject: Re: [rules-users] Custom operator If you look at the implementation of one of the existing operators (e.g. MatchesEvaluatorDefinition) you will see this in the beginning of the class: public static final Operator MATCHES = Operator.addOperatorToRegistry( "matches", false ); Do the same on your own implementations and it should be fine. Edson 2010/10/25 Bruno Freudensprung <bruno.freudensprung@temis.com>:Hello, It seems that the logic behind the "operator" drop-down list comes from the "org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine" and "org.drools.eclipse.rulebuilder.modeldriven.HumanReadable" classes. That's for the "rule authoring" perspective. I've also seen that the business rule editor involves the DrlParser class. So, in a "rule parsing" perspective, I guess I need to find a way to register my custom operator into the EvaluatorRegistry used by the Eclipse plugin (and I don't know where this can be done). Do you think I am on the right track? Is there a risk that code modifications will involve so many classes that, in the end, adding a custom operator to the business rule editor will be a difficult task for someone very new to Drools (like me)? Thanks in advance, Best regards, Bruno. Bruno Freudensprung a écrit :Hello, I'd like to implement a custom "lucenematches" operator that would enable writing conditions like: $d : Doc(text lucenematches "(foo AND bar) OR roam~0.8") As I've taken a look at the following post on athico (http://blog.athico.com/2009/05/imperfect-evaluations.html), and seen that the appendix B of the "Drools JBoss Rules 5.0 Developer's Guide" book that deals with custom operators, I am rather confident that I will find my way in implementing my operator (if not, I'll post here again :-)). However, I wonder if it will be possible to add my "lucenematches" operator to the "operator" drop-down list of the Eclipse's Business Rule Editor. Does anyone have an idea? Best regards, Bruno. _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users_______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users-- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster@nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 ************************************************************************************** _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users