/* This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.opentripplanner.routing.edgetype; import org.opentripplanner.routing.core.State; import org.opentripplanner.routing.core.StateEditor; import org.opentripplanner.routing.core.TraverseMode; import org.opentripplanner.routing.graph.Edge; import org.opentripplanner.routing.vertextype.TransitStation; import org.opentripplanner.routing.vertextype.TransitStop; import com.vividsolutions.jts.geom.LineString; import java.util.Locale; /** * An edge that connects a parent station to a constituent stop. This is not intended to provide * implicit transfers (i.e. child stop to parent station to another child stop) but instead to allow * beginning or ending a path (itinerary) at a parent station. * * Currently this edge is only intended for use at the beginning or end of a path. * * Note that when most users specify that they want to depart from a parent stop at 8AM, they * actually want to leave from any constituent stop at or after exactly 8AM and are accounting for * the initial walk access leg themselves. No edge should have zero cost (this can potentially * create endless search loops) but the edges can have zero time while having positive cost. */ public class StationStopEdge extends Edge { private static final long serialVersionUID = 20130918L; public StationStopEdge(TransitStation from, TransitStop to) { super(from, to); } public StationStopEdge(TransitStop from, TransitStation to) { super(from, to); } @Override public State traverse(State s0) { if (s0.backEdge instanceof StationStopEdge) { return null; } StateEditor s1 = s0.edit(this); s1.setBackMode(TraverseMode.LEG_SWITCH); s1.incrementWeight(1); // Increment weight, but not time. See Javadoc on this class. return s1.makeState(); } @Override public double getDistance() { return 0; } @Override public LineString getGeometry() { return null; } @Override public String getName() { return null; } @Override public String getName(Locale locale) { return null; } public String toString() { return "StationStopEdge(" + fromv + " -> " + tov + ")"; } }