/**
* Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onebusaway.transit_data_federation.impl.otp.graph;
import org.onebusaway.transit_data_federation.impl.otp.GraphContext;
import org.onebusaway.transit_data_federation.impl.otp.ItineraryWeightingLibrary;
import org.onebusaway.transit_data_federation.services.realtime.ArrivalAndDepartureInstance;
import org.onebusaway.transit_data_federation.services.tripplanner.StopTransfer;
import org.opentripplanner.routing.core.EdgeNarrative;
import org.opentripplanner.routing.core.State;
import org.opentripplanner.routing.core.StateEditor;
import org.opentripplanner.routing.core.TraverseOptions;
public class ArrivalAndTransferEdge extends AbstractEdge {
private ArrivalAndDepartureInstance _instance;
private StopTransfer _transfer;
public ArrivalAndTransferEdge(GraphContext context,
ArrivalAndDepartureInstance instance, StopTransfer transfer) {
super(context);
_instance = instance;
_transfer = transfer;
}
@Override
public State traverse(State s0) {
TraverseOptions options = s0.getOptions();
if (options.isArriveBy())
return traverseReverse(s0);
else
return traverseForward(s0);
}
private State traverseForward(State s0) {
TraverseOptions options = s0.getOptions();
/**
* Check if we've reached our transfer limit
*/
if (s0.getNumBoardings() >= options.maxTransfers)
return null;
int transferTime = ItineraryWeightingLibrary.computeTransferTime(_transfer,
options);
int t = transferTime + options.minTransferTime;
EdgeNarrative narrative = createNarrative(s0, s0.getTime() + t * 1000);
StateEditor edit = s0.edit(this, narrative);
edit.incrementTimeInSeconds(t);
double weight = ItineraryWeightingLibrary.computeTransferWeight(
transferTime, options);
edit.incrementWeight(weight);
return edit.makeState();
}
private State traverseReverse(State s0) {
TraverseOptions options = s0.getOptions();
int transferTime = ItineraryWeightingLibrary.computeTransferTime(_transfer,
options);
double weight = ItineraryWeightingLibrary.computeTransferWeight(
transferTime, options);
EdgeNarrative narrative = createNarrative(s0, s0.getTime());
StateEditor edit = s0.edit(this, narrative);
edit.setTime(_instance.getBestArrivalTime());
edit.incrementWeight(weight);
return edit.makeState();
}
/****
* Private Methods
****/
private EdgeNarrative createNarrative(State s0, long time) {
BlockArrivalVertex fromVertex = new BlockArrivalVertex(_context, _instance);
DepartureVertex toVertex = new DepartureVertex(_context,
_transfer.getStop(), time);
return narrative(s0, fromVertex, toVertex);
}
}