[rules-users] Bugs in rule templates?

[Bruno Freudensprung]

Alright!
Concerning the package declaration, it is mentioned as "optional" (see 
Example 5.3. Rule template file: templates) in the documentation.
Thanks for your answer!

Regards,

Bruno.

Le 03/11/2011 16:27, Wolfgang Laun a écrit :
> It seems that some template/CSV parser expects the parameters in the 
> same order as the column headers of the CSV. Also, there is no 
> explicit termination of the parameter list, and therefore the parser 
> appears to rely on "package" being the first statement of the header 
> text to precede all expansions.
>
> At least, it should be documented.
>
> -W
>
>
> 2011/11/3 Bruno Freudensprung <bruno.freudensprung at temis.com 
> <mailto:bruno.freudensprung at temis.com>>
>
>
>     Hi Wolfgang,
>
>     Sure. Please find attached a small Maven/Eclipse project
>     containing 3 DRT and 3 unit test cases (Java in
>     src/test/java/org/drools/bug, rules in
>     src/test/resource/org/drools/bug) :
>
>         * Test1OK(.java/.drt/.csv) is the one working well
>         * Test1KO(.java/.drt/.csv) is the one illustrating the 1) behavior
>         * Test1KO2(.java/.drt/.csv) is the one illustrating the 2)
>           behavior
>
>     Regards,
>
>     Bruno.
>
>     Le 03/11/2011 14:07, Wolfgang Laun a écrit :
>>     Before you work on a JIRA could you please provide an
>>     (abbreviated) example of a template that causes both errors?
>>     -W
>>
>>     2011/11/3 Bruno Freudensprung <bruno.freudensprung at temis.com
>>     <mailto:bruno.freudensprung at temis.com>>
>>
>>         Hi all,
>>
>>         I am writing rules using Drools Templates and I noticed
>>         strange problems (ocurring when I slightly modify a DRT that
>>         works well):
>>
>>            1. the template instanciation depends on the declarations
>>               order of the parameters in the template header
>>            2. if the rule template does not contain a package
>>               declaration (default package) the instanciation of the
>>               template fails
>>
>>         I am working with Drools 5.1.1 but those problems occur in
>>         5.2.0.Final and in 5.3.0.Final as well.
>>         Do you think it is worth posting a JIRA?
>>
>>         Anyway let me tell you that Drools Templates are great! Our
>>         users like that feature a lot! They start writing a rule in
>>         DRL format and, once it works, they transform it into a DRT
>>         and put data into a tsv file. It is quite a natural way of
>>         working. The general perception here is that it is easier to
>>         "templatize" an existing DRL than to write a decision table
>>         from scratch.
>>
>>         Best regards,
>>
>>         Bruno.
>>
>>         PS:
>>
>>         _DRT that works well_:
>>
>>         template header
>>         *name
>>         message
>>
>>         package templates;
>>         *
>>         import org.drools.bug.Entity;
>>
>>         template "TestTemplate"
>>         rule "Test1 @{row.rowNumber}"
>>             dialect "mvel"
>>             when
>>                 Entity( $name : name == "@{name}" )
>>             then
>>                 System.out.println("@{message}" + $name);
>>                 insert($name);
>>         end
>>         end template
>>
>>         _DRT that does not work_ (first case):
>>
>>         template header
>>         *message
>>         name
>>
>>         package templates;
>>         *
>>         import org.drools.bug.Entity;
>>
>>         template "TestTemplate"
>>         rule "Test1 @{row.rowNumber}"
>>             dialect "mvel"
>>             when
>>                 Entity( $name : name == "@{name}" )
>>             then
>>                 System.out.println("@{message}" + $name);
>>                 insert($name);
>>         end
>>         end template
>>
>>
>>         _DRT that does not work_ (second case):
>>
>>         template header
>>         *name
>>         message
>>         *
>>         import org.drools.bug.Entity;
>>
>>         template "TestTemplate"
>>         rule "Test1 @{row.rowNumber}"
>>             dialect "mvel"
>>             when
>>                 Entity( $name : name == "@{name}" )
>>             then
>>                 System.out.println("@{message}" + $name);
>>                 insert($name);
>>         end
>>         end template
>>
>>
>>
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