On Jul 16, 2013, at 11:49 AM, Ishan Jayawardena <[email protected]> wrote:
> Hi Hiranya, > In my opinion, approach 2 suggests the correct behavior. Could you please explain the reason? Does the current behavior break anything? Is there any special use cases where the existing behavior doesn't work out properly? Thanks, Hiranya > > Thanks, > Ishan. > > > On Tue, Jul 16, 2013 at 11:46 PM, Hiranya Jayathilaka <[email protected]> > wrote: > Hi Folks, > > The property mediator supports a pattern attribute which can be used to > specify a regular expression. When specified, the value of the XPath > expression is matched against this regex and the resulting group of the match > is what gets assigned to the property. If the regex doesn't match, the > mediator assigns the original value of the XPath expression to the property. > > SYNAPSE-890 argues that this behavior is wrong, and the mediator must assign > the empty string to the property if the regex doesn't match. I'm not quite > sure what the right behavior should be. Does anybody have any ideas? To me > it's a contest between: > > 1. Assign the value of the XPath expression (current behavior) > 2. Assign the empty string (behavior proposed in SYNAPSE-890) > 3. Not set the property value at all - leave the current property value > unmodified > > Thanks, > Hiranya > > -- > Hiranya Jayathilaka > Mayhem Lab/RACE Lab; > Dept. of Computer Science, UCSB; http://cs.ucsb.edu > E-mail: [email protected]; Mobile: +1 (805) 895-7443 > Blog: http://techfeast-hiranya.blogspot.com > > > > > -- > Regards, > Ishan Jayawardena. > -- Hiranya Jayathilaka Mayhem Lab/RACE Lab; Dept. of Computer Science, UCSB; http://cs.ucsb.edu E-mail: [email protected]; Mobile: +1 (805) 895-7443 Blog: http://techfeast-hiranya.blogspot.com
