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GraphHopper is a fast and memory efficient Java road routing engine working seamlessly with OpenStreetMap data.

There is a newer version: 10.0

package com.graphhopper.routing.util.parsers;

import com.graphhopper.reader.ReaderWay;
import com.graphhopper.routing.ev.Crossing;
import com.graphhopper.routing.ev.EnumEncodedValue;
import com.graphhopper.routing.ev.EdgeIntAccess;
import com.graphhopper.storage.IntsRef;
import com.graphhopper.util.Helper;

import java.util.List;
import java.util.Map;

/**
 * Parses the node information regarding crossing=* and railway=*
 */
public class OSMCrossingParser implements TagParser {
    protected final EnumEncodedValue crossingEnc;

    public OSMCrossingParser(EnumEncodedValue crossingEnc) {
        this.crossingEnc = crossingEnc;
    }

    @Override
    public void handleWayTags(int edgeId, EdgeIntAccess edgeIntAccess, ReaderWay readerWay, IntsRef relationFlags) {
        List> nodeTags = readerWay.getTag("node_tags", null);
        if (nodeTags == null)
            return;

        for (int i = 0; i < nodeTags.size(); i++) {
            Map tags = nodeTags.get(i);
            if ("crossing".equals(tags.get("railway")) || "level_crossing".equals(tags.get("railway"))) {
                String barrierVal = (String) tags.get("crossing:barrier");
                crossingEnc.setEnum(false, edgeId, edgeIntAccess, (Helper.isEmpty(barrierVal) || "no".equals(barrierVal)) ? Crossing.RAILWAY : Crossing.RAILWAY_BARRIER);
                return;
            }

            String crossingSignals = (String) tags.get("crossing:signals");
            if ("yes".equals(crossingSignals)) {
                crossingEnc.setEnum(false, edgeId, edgeIntAccess, Crossing.TRAFFIC_SIGNALS);
                return;
            }

            String crossingMarkings = (String) tags.get("crossing:markings");
            if ("yes".equals(crossingMarkings)) {
                crossingEnc.setEnum(false, edgeId, edgeIntAccess, Crossing.MARKED);
                return;
            }

            String crossingValue = (String) tags.get("crossing");
            // some crossing values like "no" do not require highway=crossing and sometimes no crossing value exists although highway=crossing
            if (Helper.isEmpty(crossingValue) && ("no".equals(crossingSignals) || "no".equals(crossingMarkings)
                    || "crossing".equals(tags.get("highway")) || "crossing".equals(tags.get("footway")) || "crossing".equals(tags.get("cycleway")))) {
                crossingEnc.setEnum(false, edgeId, edgeIntAccess, Crossing.UNMARKED);
                // next node could have more specific Crossing value
                continue;
            }
            Crossing crossing = Crossing.find(crossingValue);
            if (crossing != Crossing.MISSING)
                crossingEnc.setEnum(false, edgeId, edgeIntAccess, crossing);
        }
    }
}