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Forums Process Modeling Event Policy = matches

Event Policy = matches

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9:23 pm
November 15, 2009

bhussain

Member

posts 32

Hi All,

In the Event Policy rule, what does expression “matches” mean for variable string?

I want to create a rule where if the field value (which is string datatype) contains/matches “SPNB”, then trigger the event policy.

Read the documentation, it supposed to have “contains” expression, but I don't see it in the expression list.

How do we use the expression “matches” in the above condition above?

Thanks.

10:46 pm
November 15, 2009

Shigang Liu

Member

posts 54

Hi bhussain,

“Match” means regular expression. Below is the definition:

Matches Operator

Matches a field against any valid Java Regular Expression. Typically that regexp is a String, but variables that resolve to a valid regexp are also allowed. It is important to note that different from java, if you write a String regexp directly on the source file, you don't need to escape '\'. Example:

Example 6.12. Regular Expression Constraint

Cheese( type matches “(Buffalo)?\S*Mozerella” )

Not Matches Operator

Any valid Java Regular Expression can be used to match String fields. Returns true when the match is false. Typically that regexp is a String, but variables that resolve to a valid regexp are also allowed.It is important to note that different from java, if you write a String regexp directly on the source file, you don't need to escape '\'. Example:

Example 6.13. Regular Expression Constraint

Cheese( type not matches “(Buffulo)?\S*Mozerella” )

Regards,

Shigang Liu

11:10 pm
November 16, 2009

bhussain

Member

posts 32

Shigang,

Now I know..it was quite a trick to be able to use Regular Expression in here…finally I got it after sometimes browsing the Net for answers and clues…

“fieldvariable matches .*SPNB.*”

I hope Vitria can update the documentation and give some examples on common expressions used like wildcard, character searching, etc. Would be a great help for Vitrians.

Thanks Shigang

3:11 am
November 17, 2009

Shigang Liu

Member

posts 54

bhussain,

Ok. Yes regular expression need lots of trick. But most cases “.” and “*” are enough like a sql where clause.

Regards,

Liu Shigang

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