Description Abel Hegedus 2018-01-30 11:27:15 EST

If the query definition contains evaluation backend hints (see https://www.eclipse.org/viatra/documentation/query-language.html#_pattern_structure ) to select Local Search backend (with "search"), it always uses the EMF-specific LS backend, even if the Generic LS backend is selected with engine level hints.

Example:

  search pattern className(c : EClass, clName : java ^java.lang.String) {
    EClass.name(c, clName);
  }

  queryOptions = LocalSearchHints.getDefaultGeneric()
    .setUseBase(true).build();
  queryEngineOptions = ViatraQueryEngineOptions
    .defineOptions().withDefaultHint(queryOptions)
    .withDefaultBackend(queryOptions.getQueryBackendFactory()).build();
  engine = AdvancedViatraQueryEngine.createUnmanagedEngine(scope, queryEngineOptions);

Creating the matcher will NOT use Generic LS backend.