Conditional filter

[vpawar-tibco]

Added support to provide custom filter conditions in filter activity.
Example usage - Filter all streams which meets certain condition e.g input value > threshold, input string contains keyword substring.

[flogo-oss]

All committers have signed the CLA.

[fm-tibco]

Hi @vpawar-ai, just to clarify, does "condition" is true just filter the specified value. When I think "condition" I think of an expression instead of a boolean. Should we let condition be string and options are "<,>,==,<=,>=, !=" ?

[vpawar-tibco]

Hi @fm-tibco, the "condition" input data type is boolean because it is expected that the filter expression evalutes to true or false. Example - for condition expression string.contains($pipeline.input,"keyword"), the activity will filter(skip) all the inputs matching the expression.

[fm-tibco]

Oh, I see the condition expression is actually external to the activity. You are using the result of a mapping expression and assigning that to the "condition".

It if this the case, I think we should try to come up with an alternative name. Basically when "true" you filter out the value, so make like a "force" or "explict" filter... @mellistibco any thoughts on a possible name for this?