Re: [rules-users] Problem implementing dynamic regular expression

And what about using a global? Best Regards XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Esteban Aliverti - Developer @ http://www.plugtree.com - Blog @ http://ilesteban.wordpress.com 2011/1/24 Bruno Freudensprung <bruno.freudensprung(a)temis.com&gt; > > Thanks for the advice! > > Bruno. > > > Wolfgang Laun a écrit : > > If some value is variable, it must be privided in a fact - otherwise > the Inference Engine does not register any changes. > > Notice that you cannot use "matches" in an eval, where plain Java (or > mvel) must be used. > > -W > > 2011/1/24 Bruno Freudensprung <bruno.freudensprung(a)temis.com&gt;: > > > Thanks Wolfgang! My sincere apologies for the wrong answer. > Does it mean that (probably at the price of a performance penalty) one > could > handle the variable results of getPropName() over time and write (?): > > MyEvent(eval (prop1 matches ("This event is for"+getPropName()+" and is > sent > toblah blah blah"))) > > Best regards, > > Bruno. > > Wolfgang Laun a écrit : > > 2011/1/24 Bruno Freudensprung <bruno.freudensprung(a)temis.com&gt; > > > MyEvent(prop1 matches eval("This event is for"+getPropName()+" and is sent > to > blah blah blah")) > > > > You cannot use eval() like this. It is a conditional element. > > If getPropName() is a function that is constant over time (!) then you > should be able to > > MyEvent(prop1 matches ("This event is for"+getPropName()+" and is...")) > > If you need to match against a value that should change during > execution, put the value into a fact and make sure to update/modify > that fact when you change the value: > > MyPattern( $v: value ) > MyEvent( prop1 matches ("This event is for"+$v +" and is...")) > > In both cases, the parentheses around the concatenaion are essential. > > -W > > > > > > Best regards, > > Bruno. > > > Ayush a écrit : > > Hi, I'm trying to implement regular expression using matches. The regular > expression is dynamic and retrieved from a java function. In my first > approach I'm tried to call the java function for matches like > > MyEvent(prop1 matches "This event is for"+getPropName()+" and is sent to > blah blah blah") > > Now when I try to execute the above expression it gives error as illegal > statement (I even tried back-slash to escape it). It also gives error like > "Expecting ')' instead of '(' ". > > So I declared a function which takes two string parameters and returns me > the concatenated one. > function String concatenate(String str1, String str2) { > return str1+str2; > } > > $matchStr : String() from concatenate("This event is for",getPropName()+" > and is sent to blah blah blah") > > Now when I'm using this variable in my rule it is not getting executed. > Please note that there is no problem in regex because when I put the regex > as string (i.e. without using any function to retreive it) it works fine. > > MyEvent(prop1 matches $matchStr) > > Can anyone please let me know how can I solve it. Thanks in advance. > > > > > _______________________________________________ > 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 > > > > _______________________________________________ > 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 > > > > _______________________________________________ > 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