BloombergLP::ball::AttributeContext::determineThresholdLevels

Populate the specified levels with the threshold levels for the specified category. This method compares the threshold levels defined by category with those of any active rules that apply to that category, and determines the minimum severity (i.e., the maximum numerical value) for each respective threshold amongst those values. A rule applies to category if the rule's pattern matches category‐>categoryName(), and a rule is active if all the attributes defined for that rule are satisfied by the current thread's attributes (i.e., Rule::evaluate returns true for the collection of attributes maintained by this object). This method operates on the set of rules maintained by the category manager supplied to the initialize class method (which, in practice, should be the global set of rules for the process). The behavior is undefined unless initialize has previously been invoked without a subsequent call to reset, and category is contained in the registry maintained by the category manager supplied to initialize.