IncQuery Headless execution

IncQueryHeadless.java

public String execute(String modelPath, String patternFQN) {
 ResourceSet resourceSet = new ResourceSetImpl();
 URI fileURI = URI.createFileURI(modelPath);
 Resource resource = resourceSet.getResource(fileURI, true);
 if (resource != null) {
  try {
   IncQueryMatcher matcher = MatcherFactoryRegistry.getMatcherFactory(patternFQN).getMatcher(resource);
   Collection<IPatternMatch> matches = matcher.getAllMatches();
   for (IPatternMatch match : matches) {
    IncQueryEngine.getDefaultLogger().logError(match.prettyPrint());
    results.append(match.prettyPrint());
   }
  } catch (IncQueryRuntimeException e) {
   e.printStackTrace();
  }
 }
}