Implementation type that evaluates and caches whether logging rules are active.
Declared in <ball_attributecontext.h>
class AttributeContext_RuleEvaluationCache;This is an implementation type of AttributeContext and should not be used by clients of this package. A rule evaluation cache is a mechanism for evaluating and caching whether a rule is active. A rule is considered active if all of its attributes are satisfied by the collection of attributes held in a AttributeContainerList object (i.e., Rule::evaluate returns true for the AttributeContainerList object). The rules this cache evaluates are contained in a RuleSet object. RuleSet::MaskType is a bit mask for a rule set, where each bit is a boolean value associated with the rule at the corresponding index in a rule set. An AttributeContext determines, using the isDataAvailable method, if a particular set of rules (described using a bit mask) have already been evaluated. A context accesses the current cache of rule evaluations using the knownActiveRules method. Finally, a context updates the cache of rule evaluations using the update method. Note that the isDataAvailable method should be used prior to using knownActiveRules in order to ensure the relevant rules have been evaluated and that those evaluations are up-to-date.
| Name | Description |
|---|---|
AttributeContext_RuleEvaluationCache [constructor] | Create an empty rule evaluation cache having a sequence number of -1. |
clear | Clear any currently cached rule evaluation data, restoring this object to its default constructed state (empty). |
isDataAvailable | Return whether this cache has up-to-date evaluations for the given rules. |
knownActiveRules | Return a bit mask of rules known to be active after the last update. |
print | Format this object to the specified output stream. |
update | Update the cache of rule evaluations for the specified sequence number and rules. |