org.opentripplanner.street.model.vertex.VertexLabel Maven / Gradle / Ivy
package org.opentripplanner.street.model.vertex;
import org.opentripplanner.transit.model.framework.FeedScopedId;
/**
* A label for a vertex so it can be identified when finding vertices in the graph.
*
* This is not just a string in order to conserve memory because many vertices have IDs that
* have the same prefix.
*/
public sealed interface VertexLabel {
static VertexLabel string(String label) {
return new StringLabel(label);
}
static VertexLabel osm(long nodeId, String level) {
return new OsmNodeOnLevelLabel(nodeId, level);
}
static VertexLabel osm(long nodeId) {
return new OsmNodeLabel(nodeId);
}
static VertexLabel feedScopedId(FeedScopedId id) {
return new FeedScopedIdLabel(id);
}
/**
* A vertex label that is based on a string.
*/
record StringLabel(String value) implements VertexLabel {
@Override
public String toString() {
return value;
}
}
/**
* A vertex label for an OSM node id.
*/
record OsmNodeLabel(long nodeId) implements VertexLabel {
private static final String TEMPLATE = "osm:node:%s";
@Override
public String toString() {
return TEMPLATE.formatted(nodeId);
}
}
/**
* A vertex label for an OSM node that also has a level, for example the upper and lower
* vertices of an elevator edge.
*/
record OsmNodeOnLevelLabel(long nodeId, String level) implements VertexLabel {
private static final String TEMPLATE = "osm:node:%s/%s";
@Override
public String toString() {
return TEMPLATE.formatted(nodeId, level);
}
}
/**
* A vertex label that represents a feed-scoped id, like a transit stop.
*/
record FeedScopedIdLabel(FeedScopedId id) implements VertexLabel {
@Override
public String toString() {
return id.toString();
}
}
}