Class BaseQueryGroup

    • Constructor Detail

      • BaseQueryGroup

        public BaseQueryGroup()
    • Method Detail

      • prepare

        public void prepare​(ViatraQueryEngine engine)
        Description copied from interface: IQueryGroup
        Initializes matchers for the group of patterns within an 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.

        Specified by:
        prepare in interface IQueryGroup
        Parameters:
        engine - the existing VIATRA Query engine in which the matchers will be created.