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.

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

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

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