public interface IQueryGroup
It handles more than one patterns as a group, and provides functionality to initialize the matchers together (which has performance benefits).
|Modifier and Type||Method and Description|
Returns the currently assigned
Initializes matchers for the group of patterns within an
void prepare(ViatraQueryEngine engine) throws ViatraQueryException
ViatraQueryEngine. If some of the pattern matchers are already constructed in the engine, no task is performed for them.
This preparation step has the advantage that it prepares pattern matchers for an arbitrary number of patterns in a single-pass traversal of the model. This is typically more efficient than traversing the model each time an individual pattern matcher is initialized on demand. The performance benefit only manifests itself if the engine is not in wildcard mode.
engine- the existing VIATRA Query engine in which the matchers will be created.
ViatraQueryException- if there was an error in preparing the engine