How to use

contractNodes

method

in

com.graphhopper.routing.ch.PrepareContractionHierarchies

protected void runGraphContraction() {
  if (!prepareNodes())
    return;
  contractNodes();
}

protected void runGraphContraction() {
  if (!prepareNodes())
    return;
  contractNodes();
}

@Override
public void doWork()
{
  if (prepareFlagEncoder == null)
    throw new IllegalStateException("No vehicle encoder set.");
  if (prepareWeighting == null)
    throw new IllegalStateException("No weight calculation set.");
  allSW.start();
  super.doWork();
  initFromGraph();
  if (!prepareNodes())
    return;
  contractNodes();
}

@Override
public void doWork() {
  if (prepareWeighting == null)
    throw new IllegalStateException("No weight calculation set.");
  allSW.start();
  super.doWork();
  initFromGraph();
  if (!prepareNodes())
    return;
  contractNodes();
}