Class RunOnceQueryEngine

  • All Implemented Interfaces:
    IRunOnceQueryEngine

    public class RunOnceQueryEngine
    extends java.lang.Object
    implements IRunOnceQueryEngine
    Run-once query engines can be used to retrieve the current match set of query specifications in a given scope. The engine is initialized with a Notifier as scope and a base index options that specifically allows traversing derived features that are not well-behaving.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected boolean samplingMode  
    • Constructor Summary

      Constructors 
      Constructor Description
      RunOnceQueryEngine​(org.eclipse.emf.common.notify.Notifier notifier)
      Creates a run-once query engine on the given notifier.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      <Match extends IPatternMatch>
      java.util.Collection<Match>
      getAllMatches​(IQuerySpecification<? extends ViatraQueryMatcher<Match>> querySpecification)
      Returns the set of all matches for the given query in the scope of the engine.
      BaseIndexOptions getBaseIndexOptions()
      The base index options specifies how the base index is built, including wildcard mode (defaults to false) and dynamic EMF mode (defaults to false).
      org.eclipse.emf.common.notify.Notifier getScope()  
      void resampleOnNextCall()
      If automatic resampling is enabled and the value of derived features may change without model modifications, calling this method will make sure that re-sampling will occur before returning match results.
      void setAutomaticResampling​(boolean automaticResampling)
      When set to true, the run-once query engine will not dispose it's engine and will resample the values of derived features before returning matches if the model changed since the last call.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait