expression filtering notifications
Filter
Filter
AFilter
represents a boolean expression to be evaluated against anEvent
. It consists of a set of constraints. Each constraint poses a condition on an attribute of theEvent
. AFilter
can pose multiple constraints on the same attribute.A
Filter
is implemented by means of amultimap<string, AttributeConstraint>
, therefore aFilter
can be manipulated using all the methods of a standardmultimap
. Two additional utility methods are provided to add constraints.
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