SpeedRestrictionTagger.java 文件源码

public Map<String, String> tag(Feature feature) {
    TreeMultimap<String, Integer> speeds = TreeMultimap.create();
    List<SpeedRestriction> restrictions = dbf.getSpeedRestrictions(feature.getLong("ID"));
    boolean reversed = isReversed(feature);
    for (SpeedRestriction restriction : restrictions) {
        switch (restriction.getValidity()) {
            case positive:
                speeds.put(reversed ? "maxspeed:backward" : "maxspeed:forward", restriction.getSpeed());
                break;
            case negative:
                speeds.put(reversed ? "maxspeed:forward" : "maxspeed:backward", restriction.getSpeed());
                break;
            case both:
                speeds.put("maxspeed", restriction.getSpeed());
                break;
        }
    }
    Map<String, String> result = Maps.newHashMap();
    for (String key : speeds.keySet()) {
        result.put(key, String.valueOf(speeds.get(key).iterator().next()));
    }
    return result;
}