started major refactoring

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>de.srsoftware</groupId>
 	<artifactId>web4rail</artifactId>
-	<version>1.1.11</version>
+	<version>1.2.0</version>
 	<name>Web4Rail</name>
 	<packaging>jar</packaging>
 	<description>Java Model Railway Control</description>

src/main/java/de/srsoftware/web4rail/Application.java

@@ -13,7 +13,6 @@ import java.net.InetSocketAddress;
 import java.net.URI;
 import java.net.URLDecoder;
 import java.nio.file.Files;
-import java.util.Date;
 import java.util.HashMap;
 
 import org.slf4j.Logger;
@@ -23,7 +22,6 @@ import com.sun.net.httpserver.HttpExchange;
 import com.sun.net.httpserver.HttpServer;
 
 import de.keawe.localconfig.Configuration;
-import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.actions.ActionList;
 import de.srsoftware.web4rail.conditions.Condition;
@@ -81,19 +79,6 @@ public class Application extends BaseClass{
         Desktop.getDesktop().browse(URI.create("http://"+InetAddress.getLocalHost().getHostName()+":"+config.getInt(PORT)+"/plan"));
 	}
 	
-	/**
-	 * helper class creating unique ids for use throuout the application
-	 * @return
-	 */
-	public static int createId() {
-		try {
-			Thread.sleep(1);
-		} catch (InterruptedException e) {
-			e.printStackTrace();
-		}
-		return new Date().hashCode();
-	}
-	
 	/**
 	 * handles request from clients by delegating them to respective classes
 	 * @param params
@@ -275,14 +260,4 @@ public class Application extends BaseClass{
 		OutputStreamWriter sseWriter = new OutputStreamWriter(client.getResponseBody());
 		plan.addClient(sseWriter);
 	}
-	
-	/**
-	 * shorthand for Translations.get(text,fills)
-	 * @param text
-	 * @param fills
-	 * @return
-	 */
-	private static String t(String text, Object...fills) {
-		return Translation.get(Application.class, text, fills);
-	}
 }

src/main/java/de/srsoftware/web4rail/BaseClass.java

@@ -2,14 +2,25 @@ package de.srsoftware.web4rail;
 
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Random;
 
 import org.json.JSONObject;
 
+import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
+import de.srsoftware.web4rail.Plan.Direction;
+import de.srsoftware.web4rail.actions.Action;
+import de.srsoftware.web4rail.conditions.Condition;
+import de.srsoftware.web4rail.moving.Car;
+import de.srsoftware.web4rail.moving.Locomotive;
+import de.srsoftware.web4rail.moving.Train;
 import de.srsoftware.web4rail.tags.Button;
+import de.srsoftware.web4rail.tiles.Block;
+import de.srsoftware.web4rail.tiles.Contact;
+import de.srsoftware.web4rail.tiles.Tile;
 
 public abstract class BaseClass implements Constants{
 	protected static Plan plan; // the track layout in use
@@ -17,16 +28,160 @@ public abstract class BaseClass implements Constants{
 	public static String speedUnit = DEFAULT_SPEED_UNIT;
 	public static String lengthUnit = DEFAULT_LENGTH_UNIT;
 	private static final char[] HEX_CHARS = "0123456789ABCDEF".toCharArray();
-	public static Button contextButton(String context,String text) {
-		String[] parts = context.split(":");
-		String realm = parts[0];
-		String id = parts.length>1 ? parts[1] : null;
-		return new Button(text,Map.of(REALM,realm,ID,id,ACTION,ACTION_PROPS));
+	protected Id id = null;
+	
+	public static class Context {
+		private BaseClass main = null;
+		private Tile tile;
+		private Block block;
+		private Train train;
+		private Route route;
+		private Action action;
+		private Condition condition;
+		private Car car;
+		private Contact contact;
+		private Direction direction = null;
+		
+		public Context(BaseClass object) {
+			main = object;
+			if (main instanceof Tile) this.tile = (Tile) main;
+			if (main instanceof Contact) this.contact = (Contact) main;
+			if (main instanceof Block) this.block = (Block) main;
+			if (main instanceof Train) this.train = (Train) main;
+			if (main instanceof Route) this.route = (Route) main;
+			if (main instanceof Action) this.action = (Action) main;
+			if (main instanceof Condition) this.condition = (Condition) main;
+			if (main instanceof Car) this.car = (Car) main;
+		}
+		
+		public Action action() {
+			return action;
+		}
+		
+		public Block block() {
+			return block;
+		}
+		
+		public Context block(Block newBlock) {
+			block = newBlock;
+			return this;
+		}
+
+		public Car car() {
+			return car;
+		}
+		
+		public Context clone() {
+			return new Context(main);
+		}
+		
+		public Condition condition() {
+			return condition;
+		}
+		
+		public Contact contact() {
+			return contact;
+		}
+		
+		public Direction direction() {
+			return direction;
+		}
+		
+		public Context direction(Direction newDirection) {
+			direction = newDirection;
+			return this;
+		}
+		
+		public Route route() {
+			return route;
+		}
+		
+		public Context route(Route newRoute) {
+			route = newRoute;
+			return this;
+		}
+		
+		public Tile tile() {
+			return tile;
+		}
+		
+		@Override
+		public String toString() {
+			StringBuffer sb = new StringBuffer(getClass().getSimpleName());
+			sb.append("(");
+			sb.append(t("Train: {}",train));
+			if (isSet(route))   sb.append(", "+t("Route: {}",route));
+			if (isSet(contact)) sb.append(", "+t("Contact: {}",contact));
+			sb.append(")");
+			return sb.toString();
+		}
+		
+		public Train train() {
+			return train;
+		}
+
+		public void train(Train newTrain) {
+			train = newTrain;
+		}
 	}
 	
-	public static Tag link(String tagClass,Map<String,Object> params,Object caption) {
-		String json = new JSONObject(params).toString().replace("\"", "'");
-		return new Tag(tagClass).clazz("link").attr("onclick","request("+json+")").content(caption.toString());
+	public static class Id implements Comparable<Id>{
+		private String internalId;
+
+		public Id() {
+			try {
+				Thread.sleep(1);
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+			internalId = md5sum(new Date());
+		}
+		
+		
+		public Id(String id) {
+			internalId = id;
+		}
+				
+		@Override
+		public String toString() {
+			return internalId;
+		}
+
+		@Override
+		public int compareTo(Id other) {
+			return internalId.compareTo(other.internalId);
+		}
+		
+		public static Id from(JSONObject json) {
+			return Id.from(json,ID);
+		}
+		
+		public static Id from(JSONObject json,String key) {
+			return json.has(key) ? new Id(""+json.get(key)) : null;
+		}
+		
+		public static Id from(Map<String,String> params) {
+			return Id.from(params,ID);
+		}
+
+
+		public static Id from(Map<String, String> params, String key) {
+			String sid = params.get(key);
+			return sid == null ? null : new Id(sid);
+		}
+	}
+	
+	public Button button(String text,Map<String,String> additionalProps) {
+		return new Button(text,props(additionalProps));
+	}
+	
+	public Button button(String text) {		
+		return button(text,null);
+	}
+	
+	public Id id() {
+		if (isNull(id)) id = new Id();
+		return id;
 	}
 	
 	public static boolean isNull(Object o) {
@@ -37,6 +192,16 @@ public abstract class BaseClass implements Constants{
 		return o != null;
 	}
 	
+	public Tag link(String tagClass,Object caption) {
+		return link(tagClass,caption,null);
+	}
+
+	public Tag link(String tagClass,Object caption,Map<String,String> additionalProps) {
+		String json = new JSONObject(props(additionalProps)).toString().replace("\"", "'");
+		return new Tag(tagClass).clazz("link").attr("onclick","request("+json+")").content(caption.toString());
+	}
+	
+	
 	public static String md5sum(Object o) {
 		try {
 			MessageDigest digest = MessageDigest.getInstance("MD5");
@@ -57,4 +222,30 @@ public abstract class BaseClass implements Constants{
 		overlay.entrySet().stream().forEach(entry -> merged.put(entry.getKey(), entry.getValue()));
 		return merged;
 	}
+	
+	public Window properties() {
+		return new Window(getClass().getSimpleName()+"-properties", t("Properties of {}",this));
+	}
+	
+	public Map<String,String> props(Map<String,String> additionalProps){
+		String realm = null;
+		if (this instanceof Tile) realm = REALM_PLAN;
+		if (this instanceof Contact) realm = REALM_CONTACT;
+
+		if (this instanceof Car) realm = REALM_CAR;
+		if (this instanceof Locomotive) realm = REALM_LOCO;
+		
+		if (this instanceof Train) realm = REALM_TRAIN;
+		if (this instanceof Route) realm = REALM_ROUTE;
+		if (this instanceof Action) realm = REALM_ACTIONS;
+		if (this instanceof Condition) realm = REALM_CONDITION;
+		
+		HashMap<String,String> props = new HashMap<String, String>(Map.of(REALM, realm, ACTION, ACTION_PROPS, ID, id().toString()));
+		if (isSet(additionalProps)) props.putAll(additionalProps);
+		return props;
+	}
+		
+	protected static String t(String txt, Object...fills) {
+		return Translation.get(Application.class, txt, fills);
+	}
 }

src/main/java/de/srsoftware/web4rail/Context.java

@@ -0,0 +1,5 @@
+package de.srsoftware.web4rail;
+
+public class Context {
+
+}

src/main/java/de/srsoftware/web4rail/PathFinder.java

@@ -10,7 +10,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import de.srsoftware.web4rail.Plan.Direction;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.moving.Train;
 import de.srsoftware.web4rail.tiles.Block;
 
@@ -24,12 +23,12 @@ public class PathFinder extends BaseClass{
 		for (int i=0; i<visitedRoutes.size(); i++) inset+="    ";
 		
 		boolean error = false;
-		Block block = context.block;		
+		Block block = context.block();		
 		if (isNull(block)) {
 			LOG.warn("{} → {}.availableRoutes called without context.block!",inset,Train.class.getSimpleName());
 			error = true;
 		}
-		Train train = context.train;
+		Train train = context.train();
 		if (isNull(train)) {
 			LOG.warn("{}→ {}.availableRoutes called without context.train!",inset,Train.class.getSimpleName());
 			error = true;
@@ -37,7 +36,7 @@ public class PathFinder extends BaseClass{
 		if (error) return availableRoutes;
 		
 		Block destination = train.destination();
-		Direction direction = context.direction;
+		Direction direction = context.direction();
 /*		if (isSet(direction)) {
 			LOG.debug("{}Looking for {}-bound routes from {}",inset,direction,block);
 		} else {
@@ -45,7 +44,7 @@ public class PathFinder extends BaseClass{
 		}*/
 		if (isSet(destination) && visitedRoutes.isEmpty())	LOG.debug("{}- Destination: {}",inset,destination);
 
-		Route currentRoute = context.route;
+		Route currentRoute = context.route();
 		
 		for (Route routeCandidate : block.routes()) {
 			if (routeCandidate.path().firstElement() != block) continue; // Routen, die nicht vom aktuellen Block starten sind bubu
@@ -70,9 +69,10 @@ public class PathFinder extends BaseClass{
 				} else {
 					LOG.debug("{}- Candidate: {}",inset,routeCandidate.shortName());
 					Context forwardContext = new Context(train);
-					forwardContext.block = routeCandidate.endBlock();
-					forwardContext.direction = routeCandidate.endDirection;
-					forwardContext.route = null;
+					forwardContext
+						.block(routeCandidate.endBlock())
+						.direction(routeCandidate.endDirection)
+						.route(null);
 					visitedRoutes.add(routeCandidate);
 					TreeMap<Integer, List<Route>> forwardRoutes = availableRoutes(forwardContext,visitedRoutes);
 					visitedRoutes.remove(routeCandidate);
@@ -112,5 +112,4 @@ public class PathFinder extends BaseClass{
 		
 		return selectetRoute;
 	}
-
 }

src/main/java/de/srsoftware/web4rail/Plan.java

@@ -26,7 +26,6 @@ import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.actions.Action;
 import de.srsoftware.web4rail.moving.Car;
@@ -141,10 +140,10 @@ public class Plan extends BaseClass{
 	private static final String SPEED_UNIT = "speed_unit";
 	private static final String LENGTH_UNIT = "length_unit";
 	
-	public HashMap<String,Tile> tiles = new HashMap<String,Tile>(); // The list of tiles of this plan, i.e. the Track layout
+	public HashMap<Id,Tile> tiles = new HashMap<Id,Tile>(); // The list of tiles of this plan, i.e. the Track layout
 	private HashSet<Block> blocks = new HashSet<Block>(); // the list of tiles, that are blocks
 	private HashSet<Signal> signals = new HashSet<Signal>(); // the list of tiles, that are signals
-	private HashMap<Integer, Route> routes = new HashMap<Integer, Route>(); // the list of routes of the track layout
+	private HashMap<Id, Route> routes = new HashMap<Id, Route>(); // the list of routes of the track layout
 	private ControlUnit controlUnit = new ControlUnit(this); // the control unit, to which the plan is connected 
 	private Contact learningContact;
 	
@@ -175,13 +174,13 @@ public class Plan extends BaseClass{
 		case ACTION_ANALYZE:
 			return analyze();
 		case ACTION_CLICK:
-			return click(get(params.get(ID),true));
+			return click(get(Id.from(params),true));
 		case ACTION_CONNECT:
-			Tile tile = get(params.get(ID), false);
+			Tile tile = get(Id.from(params), false);
 			if (tile instanceof Bridge) return ((Bridge)tile).requestConnect();
 			break;
 		case ACTION_MOVE:
-			return moveTile(params.get(DIRECTION),params.get(ID));
+			return moveTile(params.get(DIRECTION),Id.from(params));
 		case ACTION_PROPS:
 			return properties(params);
 		case ACTION_SAVE:
@@ -341,7 +340,7 @@ public class Plan extends BaseClass{
 	 * @param resolveShadows if this is set to true, this function will return the overlaying tiles, if the id belongs to a shadow tile.
 	 * @return the tile belonging to the id, or the overlaying tile if the respective tile is a shadow tile.
 	 */
-	public Tile get(String tileId,boolean resolveShadows) {
+	public Tile get(Id tileId,boolean resolveShadows) {
 		if (isNull(tileId)) return null;
 		Tile tile = tiles.get(tileId);
 		if (resolveShadows && tile instanceof Shadow) tile = ((Shadow)tile).overlay();
@@ -508,7 +507,7 @@ public class Plan extends BaseClass{
 	 * @throws NumberFormatException
 	 * @throws IOException
 	 */
-	private String moveTile(String direction, String tileId) throws NumberFormatException, IOException {
+	private String moveTile(String direction, Id tileId) throws NumberFormatException, IOException {
 		switch (direction) {
 		case "south":
 			return moveTile(get(tileId,false),Direction.SOUTH);
@@ -611,7 +610,7 @@ public class Plan extends BaseClass{
 	
 	private Window properties(HashMap<String, String> params) {
 		if (params.containsKey(ID)) {
-			Tile tile = get(params.get(ID), true);
+			Tile tile = get(Id.from(params), true);
 			if (isSet(tile)) return tile.propMenu();
 		}
 		
@@ -659,7 +658,7 @@ public class Plan extends BaseClass{
 	 */
 	Route registerRoute(Route newRoute) {
 		newRoute.path().stream().filter(Tile::isSet).forEach(tile -> tile.add(newRoute));
-		int newRouteId = newRoute.id();
+		Id newRouteId = newRoute.id();
 		Route existingRoute = routes.get(newRouteId);
 		if (isSet(existingRoute)) newRoute.addPropertiesFrom(existingRoute);
 		routes.put(newRouteId, newRoute);
@@ -707,7 +706,7 @@ public class Plan extends BaseClass{
 	 * @param routeId the id of the route requestd
 	 * @return
 	 */
-	public Route route(int routeId) {
+	public Route route(Id routeId) {
 		return routes.get(routeId);
 	}
 	
@@ -798,15 +797,15 @@ public class Plan extends BaseClass{
 	public Tag showContext(HashMap<String, String> params) {
 		String[] parts = params.get(CONTEXT).split(":");
 		String realm = parts[0];
-		String id = parts.length>1 ? parts[1] : null;
+		Id id = parts.length>1 ? new Id(parts[1]) : null;
 		switch (realm) {
 			case REALM_ROUTE:
-				return route(Integer.parseInt(id)).properties(params);
+				return route(id).properties(params);
 			case REALM_PLAN:
 				Tile tile = get(id, false);
 				return isNull(tile) ? null : tile.propMenu();
 			case REALM_ACTIONS:
-				Action action = Action.get(Integer.parseInt(id));
+				Action action = Action.get(id);
 				return (isSet(action)) ? action.properties(params) : null;
 				
 		}
@@ -849,16 +848,6 @@ public class Plan extends BaseClass{
 		}
 	}
 	
-	/**
-	 * shorthand for Translations.get(message,fills)
-	 * @param message
-	 * @param fills
-	 * @return
-	 */
-	private String t(String message, Object...fills) {
-		return Translation.get(Application.class, message, fills);
-	}
-	
 	/**
 	 * generates the menu for selecting tiles to be added to the layout
 	 * @return
@@ -931,7 +920,7 @@ public class Plan extends BaseClass{
 	 * @throws IOException
 	 */
 	private Object update(HashMap<String, String> params) throws IOException {
-		Tile tile = get(params.get(ID),true);
+		Tile tile = get(Id.from(params),true);
 		if (isSet(tile)) return tile.update(params);
 		
 		if (params.containsKey(LENGTH_UNIT)) lengthUnit = params.get(LENGTH_UNIT);
@@ -942,7 +931,7 @@ public class Plan extends BaseClass{
 	}
 	
 	private Object updateTimes(HashMap<String, String> params) throws IOException {
-		Tile tile = get(params.get(ID),false);
+		Tile tile = get(Id.from(params),false);
 		if (tile instanceof Block) {
 			Block block = (Block) tile;
 			place(block.updateTimes(params));

src/main/java/de/srsoftware/web4rail/Route.java

@@ -23,7 +23,6 @@ import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Plan.Direction;
 import de.srsoftware.web4rail.actions.Action;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.actions.ActionList;
 import de.srsoftware.web4rail.actions.BrakeStart;
 import de.srsoftware.web4rail.actions.BrakeStop;
@@ -72,7 +71,7 @@ public class Route extends BaseClass implements Comparable<Route>{
 	static final String SIGNALS  = "signals";
 	static final String TURNOUTS = "turnouts";
 	
-	private static HashMap<Integer, String> names = new HashMap<Integer, String>(); // maps id to name. needed to keep names during plan.analyze()
+	private static HashMap<Id, String> names = new HashMap<Id, String>(); // maps id to name. needed to keep names during plan.analyze()
 	
 	private class BrakeProcessor extends Thread {
 		private int startSpeed;
@@ -144,7 +143,7 @@ public class Route extends BaseClass implements Comparable<Route>{
 	private boolean                        disabled = false;
 	private Block                          endBlock = null;
 	public  Direction					   endDirection;
-	private int                            id;
+	private Id                             id;
 	private Vector<Tile>                   path;
 	private Vector<Signal>                 signals;
 	public  Train                          train;
@@ -163,12 +162,12 @@ public class Route extends BaseClass implements Comparable<Route>{
 	 * @throws IOException 
 	 */
 	public static Object action(HashMap<String, String> params) throws IOException {
-		Route route = plan.route(Integer.parseInt(params.get(ID)));
+		Route route = plan.route(Id.from(params));
 		if (isNull(route)) return t("Unknown route: {}",params.get(ID));
 		switch (params.get(ACTION)) {
 			case ACTION_DROP:
 				String message = plan.remove(route);
-				String tileId = params.get(Tile.class.getSimpleName());
+				Id tileId = Id.from(params,Tile.class.getSimpleName());
 				if (isSet(tileId)) {
 					Tile tile = plan.get(tileId, false);
 					if (isSet(tile)) {
@@ -228,7 +227,7 @@ public class Route extends BaseClass implements Comparable<Route>{
 	}
 	
 	private void addBasicPropertiesTo(Window win) {
-		if (isSet(train)) link("span",Map.of(REALM,REALM_TRAIN,ID,train.id,ACTION,ACTION_PROPS),t("Train: {}",train)).addTo(win);
+		if (isSet(train)) link("span",t("Train: {}",train)).addTo(win);
 		new Tag("h4").content(t("Origin and destination")).addTo(win);
 		Tag list = new Tag("ul");
 		Plan.addLink(startBlock, t("Origin: {} to {}",startBlock.name,startDirection), list);
@@ -441,8 +440,8 @@ public class Route extends BaseClass implements Comparable<Route>{
 	}
 	
 	private Object dropCodition(HashMap<String, String> params) {
-		String condId = params.get(REALM_CONDITION);
-		if (isSet(condId)) conditions.removeById(Integer.parseInt(condId));
+		Id condId = Id.from(params,REALM_CONDITION);
+		if (isSet(condId)) conditions.removeById(condId);
 		return properties(params);
 	}
 		
@@ -492,8 +491,8 @@ public class Route extends BaseClass implements Comparable<Route>{
 		return sb.toString().trim();
 	}
 	
-	public int id() {
-		if (id == 0) id = generateName().hashCode();
+	public Id id() {
+		if (id == null) id = new Id(generateName());
 		return id;
 	}
 		
@@ -512,11 +511,11 @@ public class Route extends BaseClass implements Comparable<Route>{
 		JSONObject json = new JSONObject();
 		
 		json.put(ID, id());
-		Vector<String> tileIds = new Vector<String>();
+		Vector<Id> tileIds = new Vector<Id>();
 		for (Tile t : this.path) tileIds.add(t.id());
 		json.put(PATH, tileIds);
 		
-		Vector<String> signalIds = new Vector<String>(); // list all signals affecting this route 
+		Vector<Id> signalIds = new Vector<Id>(); // list all signals affecting this route 
 		for (Tile t : this.signals) signalIds.add(t.id());
 		json.put(SIGNALS, signalIds);
 		
@@ -556,13 +555,13 @@ public class Route extends BaseClass implements Comparable<Route>{
 	}
 	
 	private Route load(JSONObject json,Plan plan) {
-		if (json.has(ID)) id = json.getInt(ID);
+		if (json.has(ID)) id = Id.from(json);
 		if (json.has(NAME)) name(json.getString(NAME));
 		JSONArray pathIds = json.getJSONArray(PATH);
 		startDirection = Direction.valueOf(json.getString(START_DIRECTION));
 		endDirection = Direction.valueOf(json.getString(END_DIRECTION));
 		for (Object tileId : pathIds) {
-			Tile tile = plan.get((String) tileId,false);
+			Tile tile = plan.get(new Id((String) tileId),false);
 			if (isNull(tile)) {
 				continue;
 			}
@@ -582,12 +581,12 @@ public class Route extends BaseClass implements Comparable<Route>{
 			JSONArray turnouts = json.getJSONArray(TURNOUTS);
 			for (int i=0; i<turnouts.length();i++) {
 				JSONObject jTurnout = turnouts.getJSONObject(i);
-				Turnout turnout = (Turnout) plan.get(jTurnout.getString(Turnout.ID), false);
+				Turnout turnout = (Turnout) plan.get(new Id(jTurnout.getString(Turnout.ID)), false);
 				addTurnout(turnout, Turnout.State.valueOf(jTurnout.getString(Turnout.STATE)));
 			}
 		}
 		if (json.has(SIGNALS)) {
-			for (Object signalId : json.getJSONArray(SIGNALS)) addSignal((Signal) plan.get((String) signalId, false));
+			for (Object signalId : json.getJSONArray(SIGNALS)) addSignal((Signal) plan.get(new Id((String) signalId), false));
 		}
 		if (json.has(ACTION_LISTS)) loadActions(json.getJSONArray(ACTION_LISTS));
 		if (json.has(CONDITIONS)) conditions.load(json.getJSONArray(CONDITIONS));

src/main/java/de/srsoftware/web4rail/actions/Action.java

@@ -13,14 +13,9 @@ import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Application;
 import de.srsoftware.web4rail.BaseClass;
-import de.srsoftware.web4rail.Plan.Direction;
-import de.srsoftware.web4rail.Route;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.moving.Train;
 import de.srsoftware.web4rail.tags.Label;
 import de.srsoftware.web4rail.tags.Select;
-import de.srsoftware.web4rail.tiles.Block;
-import de.srsoftware.web4rail.tiles.Contact;
 
 /**
  * Base Class for all other actions
@@ -28,81 +23,12 @@ import de.srsoftware.web4rail.tiles.Contact;
  *
  */
 public abstract class Action extends BaseClass {
-	private static final HashMap<Integer,Action> actions = new HashMap<Integer, Action>();
+	private static final HashMap<Id,Action> actions = new HashMap<Id, Action>();
 	public static final Logger LOG = LoggerFactory.getLogger(Action.class);
 	private static final String PREFIX = Action.class.getPackageName();
-	protected int id;
-	
-	public static class Context {
-		public Contact contact = null;
-		public Route route = null;
-		public Train train = null;
-		public Block block = null;
-		public Direction direction = null;
-		
-		public Context(Contact c, Route r, Train t, Block b, Direction d) {
-			contact = c;
-			route = r;
-			train = t;
-			block = b;
-			direction = d;
-		}
-		
-		public Context(Contact c) {			
-			contact = c;
-			setRoute(contact.route());
-		}
-		
-		public Context(Train train) {
-			setTrain(train);
-		}
-		
-		public Context(Route route) {
-			setRoute(route);
-		}
-		
-		protected Context clone() {
-			return new Context(contact, route, train, block, direction);
-		}
-
-		private void setRoute(Route route) {
-			this.route = route;
-			if (isSet(route)) setTrain(route.train);
-			
-		}
-
-		private void setTrain(Train train) {
-			this.train = train;
-			if (isSet(train)) {
-				if (isNull(route)) route = train.route;
-				setBlock(train.currentBlock());
-				setDirection(train.direction());
-			}			
-		}
-
-		private void setDirection(Direction dir) {
-			direction = dir;
-		}
-
-		private void setBlock(Block block) {
-			this.block = block;
-		}
-		
-		@Override
-		public String toString() {
-			StringBuffer sb = new StringBuffer(getClass().getSimpleName());
-			sb.append("(");
-			sb.append(t("Train: {}",train));
-			if (isSet(route))   sb.append(", "+t("Route: {}",route));
-			if (isSet(contact)) sb.append(", "+t("Contact: {}",contact));
-			sb.append(")");
-			return sb.toString();
-		}
-	}
 	
 	public Action() {
-		id = Application.createId();
-		actions.put(id, this);
+		actions.put(id(), this);
 	}
 	
 	public static Action create(String type) {
@@ -120,14 +46,10 @@ public abstract class Action extends BaseClass {
 
 	public abstract boolean fire(Context context);
 	
-	public static Action get(int actionId) {
+	public static Action get(Id actionId) {
 		return actions.get(actionId);
 	}
 
-	public int id() {
-		return id;
-	}
-
 	public JSONObject json() {
 		return new JSONObject().put(TYPE, getClass().getSimpleName());
 	}

src/main/java/de/srsoftware/web4rail/actions/ActionList.java

@@ -13,11 +13,11 @@ import org.slf4j.LoggerFactory;
 import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Application;
-import de.srsoftware.web4rail.BaseClass;
+import de.srsoftware.web4rail.BaseClass.Context;
+import de.srsoftware.web4rail.BaseClass.Id;
 import de.srsoftware.web4rail.Constants;
 import de.srsoftware.web4rail.Plan;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.tags.Button;
 import de.srsoftware.web4rail.tags.Form;
 import de.srsoftware.web4rail.tags.Input;
@@ -26,25 +26,25 @@ public class ActionList extends Vector<Action> implements Constants{
 	private static final Logger LOG = LoggerFactory.getLogger(ActionList.class);
 	
 	private static final long serialVersionUID = 4862000041987682112L;
-	private static final HashMap<Integer, ActionList> actionLists = new HashMap<Integer, ActionList>();
-	private int id;
+	private static final HashMap<Id, ActionList> actionLists = new HashMap<Id, ActionList>();
+	private Id id;
 	
 	public ActionList() {
-		id = Application.createId();
+		id = new Id();
 		actionLists.put(id,this);
 	}
 	
-	private static Integer actionId(HashMap<String, String> params) {
+	private static Id actionId(HashMap<String, String> params) {
 		if (!params.containsKey(ID)) return null;
 		String[] parts = params.get(ID).split("/");
 		if (parts.length<2) return null;
-		return Integer.parseInt(parts[1]);
+		return new Id(parts[1]);
 	}
 
-	private static Integer actionListId(HashMap<String, String> params) {
+	private static Id actionListId(HashMap<String, String> params) {
 		if (!params.containsKey(ID)) return null;
 		String[] parts = params.get(ID).split("/");
-		return Integer.parseInt(parts[0]);
+		return new Id(parts[0]);
 	}
 	
 	private Object actionTypeForm(Window win, String context) {
@@ -110,7 +110,7 @@ public class ActionList extends Vector<Action> implements Constants{
 			boolean first = true;
 			for (Action action : this) {
 				props.put(ID, id+"/"+action.id());
-				Tag act = BaseClass.link("span", Map.of(REALM,REALM_ACTIONS,ID,id+"/"+action.id(),ACTION,ACTION_PROPS,CONTEXT,context), action+NBSP).addTo(new Tag("li"));; 
+				Tag act = action.link("span", action+NBSP, Map.of(CONTEXT,context,ID,id+"/"+action.id())).addTo(new Tag("li")); 
 				if (!first) {
 					props.put(ACTION, ACTION_MOVE);
 					new Button("↑",props).addTo(act);
@@ -132,9 +132,9 @@ public class ActionList extends Vector<Action> implements Constants{
 		}		
 	}
 	
-	public boolean drop(int actionId) {
+	public boolean drop(Id actionId) {
 		for (Action action : this) {
-			if (action.id() == actionId) {
+			if (action.id().equals(actionId)) {
 				this.remove(action);
 				return true;				
 			}
@@ -150,7 +150,7 @@ public class ActionList extends Vector<Action> implements Constants{
 		return true;
 	}
 
-	public int id() {
+	public Id id() {
 		return id;
 	}
 	
@@ -172,9 +172,9 @@ public class ActionList extends Vector<Action> implements Constants{
 		return actionList;
 	}
 	
-	public boolean moveUp(int actionId) {
+	public boolean moveUp(Id actionId) {
 		for (int i=1; i<size(); i++) {
-			if (actionId == elementAt(i).id()) {
+			if (actionId.equals(elementAt(i).id())) {
 				Action action = remove(i);
 				insertElementAt(action, i-1);
 				return true;
@@ -184,11 +184,11 @@ public class ActionList extends Vector<Action> implements Constants{
 	}
 	
 	public static Object process(HashMap<String, String> params, Plan plan) {
-		Integer listId = actionListId(params);
+		Id listId = actionListId(params);
 		if (listId == null) return t("No action list id passed to ActionList.process()!");
 		ActionList actionList = actionLists.get(listId);
 
-		Integer actionId = actionId(params);
+		Id actionId = actionId(params);
 		String action = params.get(ACTION);
 		if (action == null) return t("No action passed to ActionList.process()!");
 		if (actionList == null && !List.of(ACTION_UPDATE,ACTION_PROPS).contains(action)) return t("No action list with id {} found!",listId);
@@ -209,7 +209,7 @@ public class ActionList extends Vector<Action> implements Constants{
 	}
 	
 	private static Object propsOf(HashMap<String, String> params) {
-		int actionId = actionId(params); 
+		Id actionId = actionId(params); 
 		Action action = Action.get(actionId);
 		if (action != null) return action.properties(params);
 		return t("No action with id {} found!",actionId);
@@ -219,7 +219,7 @@ public class ActionList extends Vector<Action> implements Constants{
 		return Translation.get(Application.class, text, fills);
 	}
 	
-	private static Object update(int actionId, HashMap<String, String> params, Plan plan) {
+	private static Object update(Id actionId, HashMap<String, String> params, Plan plan) {
 		Action action = Action.get(actionId);
 		if (action != null) {
 			plan.stream(action.update(params).toString());

src/main/java/de/srsoftware/web4rail/actions/BrakeCancel.java

@@ -4,8 +4,8 @@ public class BrakeCancel extends Action {
 
 	@Override
 	public boolean fire(Context context) {
-		if (isNull(context.route)) return false;
-		context.route.brakeCancel();
+		if (isNull(context.route())) return false;
+		context.route().brakeCancel();
 		return true;
 	}
 

src/main/java/de/srsoftware/web4rail/actions/BrakeStart.java

@@ -4,8 +4,8 @@ public class BrakeStart extends Action {
 
 	@Override
 	public boolean fire(Context context) {
-		if (isNull(context.route)) return false;
-		context.route.brakeStart();
+		if (isNull(context.route())) return false;
+		context.route().brakeStart();
 		LOG.debug("Started brake process...");
 		return true;
 	}

src/main/java/de/srsoftware/web4rail/actions/BrakeStop.java

@@ -4,8 +4,8 @@ public class BrakeStop extends Action {
 
 	@Override
 	public boolean fire(Context context) {
-		if (isNull(context.route)) return false;
-		context.route.brakeStop();
+		if (isNull(context.route())) return false;
+		context.route().brakeStop();
 		return true;
 	}
 

src/main/java/de/srsoftware/web4rail/actions/ConditionalAction.java

@@ -49,10 +49,8 @@ public class ConditionalAction extends Action {
 		if (!conditions.isEmpty()) {
 			Tag list = new Tag("ul");
 			for (Condition condition : conditions) {
-				HashMap<String,Object> props = new HashMap<String, Object>(Map.of(REALM,REALM_CONDITION,ID,condition.id(),ACTION,ACTION_PROPS,CONTEXT, context));
-				Tag li = link("span", props, condition+NBSP).addTo(new Tag("li"));
-				props.put(ACTION, ACTION_DROP);
-				props.put(CONTEXT,REALM_ACTIONS+":"+id());
+				Tag li = link("span", condition+NBSP,Map.of(CONTEXT,context)).addTo(new Tag("li"));
+				HashMap<String,Object> props = new HashMap<String, Object>(Map.of(REALM,REALM_CONDITION,ID,condition.id(),ACTION,ACTION_DROP,CONTEXT, REALM_ACTIONS+":"+id()));
 				new Button(t("delete"), props).addTo(li).addTo(list);
 			}
 			list.addTo(fieldset);
@@ -67,7 +65,7 @@ public class ConditionalAction extends Action {
 		Condition.selector().addTo(form);
 		
 		new Button(t("Add condition"),form).addTo(form);
-		return contextButton(context,t("Back")).addTo(form).addTo(fieldset);
+		return button(t("Back")).addTo(form).addTo(fieldset);
 	}
 
 	public boolean equals(ConditionalAction other) {

src/main/java/de/srsoftware/web4rail/actions/DetermineTrainInBlock.java

@@ -18,8 +18,8 @@ public class DetermineTrainInBlock extends Action {
 	
 	@Override
 	public boolean fire(Context context) {
-		context.block = block;
-		context.train = block.train();		
+		context.block(block);
+		context.train(block.train());		
 		return true;
 	}
 	
@@ -33,7 +33,7 @@ public class DetermineTrainInBlock extends Action {
 	@Override
 	public Action load(JSONObject json) {
 		super.load(json);
-		String blockId = json.getString(BLOCK);
+		Id blockId = Id.from(json,BLOCK);
 		if (isSet(blockId)) block = Block.get(blockId);
 		return this;
 	}
@@ -61,7 +61,7 @@ public class DetermineTrainInBlock extends Action {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		LOG.debug("update: {}",params);
-		String blockId = params.get(Block.class.getSimpleName());
+		Id blockId = Id.from(params,Block.class.getSimpleName());
 		if (isSet(blockId)) block = Block.get(blockId);
 		return properties(params);
 	}

src/main/java/de/srsoftware/web4rail/actions/FinishRoute.java

@@ -6,7 +6,7 @@ public class FinishRoute extends Action {
 
 	@Override
 	public boolean fire(Context context) {
-		Route route = context.route;
+		Route route = context.route();
 		if (isSet(route)) route.finish();
 		return true;
 	}

src/main/java/de/srsoftware/web4rail/actions/PreserveRoute.java

@@ -8,20 +8,20 @@ public class PreserveRoute extends Action {
 
 	@Override
 	public boolean fire(Context context) {
-		Train train = context.train;
-		Route route = context.route;
+		Train train = context.train();
+		Route route = context.route();
 		// These are errors:
 		if (isNull(train)) return false; 
 		if (isNull(route)) return false;
 		
-		Range waitTime = context.route.endBlock().getWaitTime(context.train,context.route.endDirection);
+		Range waitTime = route.endBlock().getWaitTime(train,route.endDirection);
 
 		// These are NOT errors:
-		if (!context.train.usesAutopilot()) return true;
+		if (!train.usesAutopilot()) return true;
 		if (waitTime.max > 0) return true; // train is expected to wait in next block.
 		if (train.destination() == route.endBlock()) return true;
 
-		context.train.reserveNext();
+		train.reserveNext();
 		return true;
 	}
 

src/main/java/de/srsoftware/web4rail/actions/SetContextTrain.java

@@ -18,14 +18,14 @@ public class SetContextTrain extends Action {
 	
 	@Override
 	public boolean fire(Context context) {
-		context.train = train;		
+		context.train(train);		
 		return true;
 	}
 	
 	@Override
 	public JSONObject json() {
 		JSONObject json = super.json();
-		if (isSet(train)) json.put(REALM_TRAIN, train.id);
+		if (isSet(train)) json.put(REALM_TRAIN, train.id());
 		return json;
 	}
 	
@@ -37,7 +37,7 @@ public class SetContextTrain extends Action {
 				public void run() {
 					try {
 						sleep(1000);
-						int trainId = json.getInt(REALM_TRAIN);
+						Id trainId = Id.from(json,REALM_TRAIN);
 						if (isSet(trainId)) train = Train.get(trainId);
 					} catch (InterruptedException e) {}						
 				};
@@ -69,8 +69,8 @@ public class SetContextTrain extends Action {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		LOG.debug("update: {}",params);
-		String trainId = params.get(Train.class.getSimpleName());
-		if (isSet(trainId)) train = Train.get(Integer.parseInt(trainId));
+		Id trainId = Id.from(params,Train.class.getSimpleName());
+		if (isSet(trainId)) train = Train.get(trainId);
 		return properties(params);
 	}
 

src/main/java/de/srsoftware/web4rail/actions/SetDisplayText.java

@@ -39,7 +39,7 @@ public class SetDisplayText extends TextAction{
 				public void run() {
 					try {
 						sleep(1000);
-						display = (TextDisplay) plan.get(json.getString(DISPLAY), false);
+						display = (TextDisplay) plan.get(Id.from(json,DISPLAY), false);
 					} catch (InterruptedException e) {}						
 				};
 			}.start();
@@ -72,7 +72,7 @@ public class SetDisplayText extends TextAction{
 	protected Object update(HashMap<String, String> params) {
 		super.update(params);
 		String displayId = params.get(TextDisplay.class.getSimpleName());
-		if (isSet(displayId)) display = (TextDisplay) plan.get(displayId, false);
+		if (isSet(displayId)) display = (TextDisplay) plan.get(new Id(displayId), false);
 		return properties(params);
 	}
 }

src/main/java/de/srsoftware/web4rail/actions/SetRelay.java

@@ -41,7 +41,7 @@ public class SetRelay extends Action {
 		super.load(json);
 		String relayId = json.getString(RELAY);
 		if (isSet(relayId)) {
-			relay = Relay.get(relayId);
+			relay = Relay.get(new Id(relayId));
 			state = json.getBoolean(Relay.STATE);
 		}
 		return this;
@@ -81,7 +81,7 @@ public class SetRelay extends Action {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		LOG.debug("update: {}",params);
-		String relayId = params.get(RELAY);
+		Id relayId = new Id(params.get(RELAY));
 		relay = Relay.get(relayId);
 		String st = params.get(Relay.STATE);
 		if (isSet(st)) state = st.equals("true");

src/main/java/de/srsoftware/web4rail/actions/SetSignal.java

@@ -39,7 +39,7 @@ public class SetSignal extends Action {
 	@Override
 	public Action load(JSONObject json) {
 		super.load(json);
-		Tile tile = plan.get(json.getString(SIGNAL), false);
+		Tile tile = plan.get(new Id(json.getString(SIGNAL)), false);
 		if (tile instanceof Signal) signal = (Signal) tile;
 		state = json.getString(Signal.STATE);
 		return this;
@@ -91,7 +91,7 @@ public class SetSignal extends Action {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		LOG.debug("update: {}",params);
-		Tile tile = plan.get(params.get(SIGNAL), false);
+		Tile tile = plan.get(new Id(params.get(SIGNAL)), false);
 		if (tile instanceof Signal) signal = (Signal) tile;
 		String st = params.get(Signal.STATE);
 		if (isSet(st)) state = st;

src/main/java/de/srsoftware/web4rail/actions/SetSpeed.java

@@ -18,8 +18,8 @@ public class SetSpeed extends Action{
 
 	@Override
 	public boolean fire(Context context) {
-		if (isNull(context.train)) return false;
-		context.train.setSpeed(speed);
+		if (isNull(context.train())) return false;
+		context.train().setSpeed(speed);
 		return true;
 	}
 	

src/main/java/de/srsoftware/web4rail/actions/StopAuto.java

@@ -4,8 +4,8 @@ public class StopAuto extends Action {
 
 	@Override
 	public boolean fire(Context context) {
-		if (isNull(context.train)) return false;
-		context.train.quitAutopilot();
+		if (isNull(context.train())) return false;
+		context.train().quitAutopilot();
 		return true;
 	}
 

src/main/java/de/srsoftware/web4rail/actions/TextAction.java

@@ -18,11 +18,11 @@ public abstract class TextAction extends Action {
 
 
 	public String fill(String tx,Context context) {
-		if (isSet(context.block)) tx = tx.replace("%block%", context.block.name);
-		if (isSet(context.contact)) tx = tx.replace("%contact%", context.contact.id());
-		if (isSet(context.direction)) tx = tx.replace("%dir%", context.direction.name());
-		if (isSet(context.route)) tx = tx.replace("%route%", context.route.name());
-		if (isSet(context.train)) tx = tx.replace("%train%", context.train.name());		
+		if (isSet(context.block())) tx = tx.replace("%block%", context.block().name);
+		if (isSet(context.contact())) tx = tx.replace("%contact%", context.contact().id().toString());
+		if (isSet(context.direction())) tx = tx.replace("%dir%", context.direction().name());
+		if (isSet(context.route())) tx = tx.replace("%route%", context.route().name());
+		if (isSet(context.train())) tx = tx.replace("%train%", context.train().name());		
 		return tx;
 	}
 	

src/main/java/de/srsoftware/web4rail/actions/TriggerContact.java

@@ -32,7 +32,7 @@ public class TriggerContact extends Action {
 	@Override
 	public Action load(JSONObject json) {
 		super.load(json);
-		String contactId = json.getString(CONTACT);
+		Id contactId = Id.from(json,CONTACT);
 		if (isSet(contactId)) contact = Contact.get(contactId);
 		return this;
 	}
@@ -60,7 +60,7 @@ public class TriggerContact extends Action {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		LOG.debug("update: {}",params);
-		String contactId = params.get(CONTACT);
+		Id contactId = Id.from(params,CONTACT);
 		if (isSet(contactId)) contact = Contact.get(contactId);
 		return properties(params);
 	}

src/main/java/de/srsoftware/web4rail/actions/TurnTrain.java

@@ -4,8 +4,8 @@ public class TurnTrain extends Action{
 
 	@Override
 	public boolean fire(Context context) {
-		if (context.train != null) {
-			context.train.turn();
+		if (context.train() != null) {
+			context.train().turn();
 			return true;
 		}
 		return false;

src/main/java/de/srsoftware/web4rail/conditions/BlockFree.java

@@ -5,7 +5,6 @@ import java.util.HashMap;
 import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.tags.Label;
 import de.srsoftware.web4rail.tiles.Block;
 
@@ -26,7 +25,7 @@ public class BlockFree extends Condition {
 	
 	public Condition load(JSONObject json) {
 		super.load(json);
-		block(Block.get(json.getString(BLOCK)));
+		block(Block.get(new Id(json.getString(BLOCK))));
 		return this;
 	}
 	
@@ -52,7 +51,7 @@ public class BlockFree extends Condition {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		if (!params.containsKey(BLOCK)) return t("No block id passed to BlockFree.update()!");
-		String bid = params.get(BLOCK);
+		Id bid = new Id(params.get(BLOCK));
 		Block block = Block.get(bid);
 		if (block == null) return t("No block with id {} found!",bid);
 		this.block = block;

src/main/java/de/srsoftware/web4rail/conditions/Condition.java

@@ -17,7 +17,6 @@ import de.srsoftware.web4rail.BaseClass;
 import de.srsoftware.web4rail.Plan;
 import de.srsoftware.web4rail.Route;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.actions.ConditionalAction;
 import de.srsoftware.web4rail.tags.Button;
 import de.srsoftware.web4rail.tags.Checkbox;
@@ -30,16 +29,15 @@ public abstract class Condition extends BaseClass {
 	public static final Logger LOG = LoggerFactory.getLogger(Condition.class);
 	private static final String INVERTED = "inverted";
 	private static final String PREFIX = Condition.class.getPackageName();
-	private static HashMap<Integer, Condition> conditions = new HashMap<Integer, Condition>();
+	private static HashMap<Id, Condition> conditions = new HashMap<Id, Condition>();
 	public boolean inverted = false;
-	protected int id;
 	private Object parent;
 
 	public Condition() {
-		this(Application.createId());
+		this(new Id());
 	}
 	
-	public Condition(int id) {
+	public Condition(Id id) {
 		this.id = id;
 		conditions.put(id, this);
 	}	
@@ -48,7 +46,7 @@ public abstract class Condition extends BaseClass {
 		String action = params.get(ACTION);
 		if (action == null) return t("No action passed to Condition.action!");
 		
-		Integer cid = (params.containsKey(ID)) ? Integer.parseInt(params.get(ID)) : null;
+		Id cid = Id.from(params);
 		
 		if (isSet(cid)) {		
 			Condition condition = conditions.get(cid);
@@ -85,14 +83,14 @@ public abstract class Condition extends BaseClass {
 		Condition condition = Condition.create(type);
 		if (isNull(condition)) return t("Unknown type \"{}\" of condition!",type);
 		String[] parts = context.split(":");
-		String contextId = parts[1];
+		Id contextId = new Id(parts[1]);
 		String realm = parts[0];
 		switch (realm) {
 		case REALM_ROUTE:
-			Route route = plan.route(Integer.parseInt(contextId));
+			Route route = plan.route(contextId);
 			if (isNull(route)) return t("Unknown route: {}",contextId);
 			route.add(condition);
-			return route.properties(new HashMap<String,String>(Map.of(REALM,REALM_ROUTE,ACTION,ACTION_PROPS,ID,contextId)));
+			return route.properties(new HashMap<String,String>(Map.of(REALM,REALM_ROUTE,ACTION,ACTION_PROPS,ID,contextId.toString())));
 			
 		default:
 			break;
@@ -125,10 +123,6 @@ public abstract class Condition extends BaseClass {
 
 	public abstract boolean fulfilledBy(Context context);
 	
-	public int id() {
-		return id;
-	}
-	
 	public JSONObject json() {
 		JSONObject json = new JSONObject().put(TYPE, getClass().getSimpleName());
 		if (inverted) json.put(INVERTED, true);
@@ -146,7 +140,7 @@ public abstract class Condition extends BaseClass {
 		String tx = args.length<1 ? toString()+NBSP : args[0];
 		String type = args.length<2 ? "span" : args[1];
 		String context = args.length<3 ? null : args[2];
-		return link(type, Map.of(REALM,REALM_CONDITION,ID,id(),ACTION,ACTION_PROPS,CONTEXT,context), tx);
+		return link(type, tx,Map.of(CONTEXT,context));
 	}
 		
 	private static List<Class<? extends Condition>> list() {

src/main/java/de/srsoftware/web4rail/conditions/ConditionList.java

@@ -8,8 +8,9 @@ import org.json.JSONObject;
 import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Application;
+import de.srsoftware.web4rail.BaseClass.Context;
+import de.srsoftware.web4rail.BaseClass.Id;
 import de.srsoftware.web4rail.Constants;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.tags.Button;
 import de.srsoftware.web4rail.tags.Form;
 import de.srsoftware.web4rail.tags.Input;
@@ -39,9 +40,9 @@ public class ConditionList extends Vector<Condition> implements Constants{
 		}
 	}
 
-	public void removeById(int cid) {
+	public void removeById(Id cid) {
 		for (Condition condition : this) {
-			if (condition.id() == cid) {
+			if (condition.id().equals(cid)) {
 				remove(condition);
 				break;
 			}

src/main/java/de/srsoftware/web4rail/conditions/OrCondition.java

@@ -6,7 +6,6 @@ import java.util.stream.Collectors;
 import org.json.JSONObject;
 
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.actions.Action.Context;
 
 public class OrCondition extends Condition{
 	

src/main/java/de/srsoftware/web4rail/conditions/PushPullTrain.java

@@ -1,12 +1,10 @@
 package de.srsoftware.web4rail.conditions;
 
-import de.srsoftware.web4rail.actions.Action.Context;
-
 public class PushPullTrain extends Condition {
 	
 	@Override
 	public boolean fulfilledBy(Context context) {
-		return context.train.pushPull != inverted;
+		return context.train().pushPull != inverted;
 	}
 
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainHasTag.java

@@ -5,7 +5,6 @@ import java.util.HashMap;
 import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.tags.Input;
 import de.srsoftware.web4rail.tags.Label;
 
@@ -17,7 +16,7 @@ public class TrainHasTag extends Condition {
 	@Override
 	public boolean fulfilledBy(Context context) {
 		if (tag == null) return true;
-		return context.train.tags().contains(tag) != inverted;
+		return context.train().tags().contains(tag) != inverted;
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainLength.java

@@ -6,7 +6,6 @@ import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.tags.Input;
 import de.srsoftware.web4rail.tags.Label;
 
@@ -17,8 +16,8 @@ public class TrainLength extends Condition {
 	
 	@Override
 	public boolean fulfilledBy(Context context) {
-		if (isNull(context.train)) return false;
-		return (context.train.length() < maxLength) != inverted;
+		if (isNull(context.train())) return false;
+		return (context.train().length() < maxLength) != inverted;
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainSelect.java

@@ -5,7 +5,6 @@ import java.util.HashMap;
 import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.moving.Train;
 import de.srsoftware.web4rail.tags.Label;
 
@@ -16,17 +15,17 @@ public class TrainSelect extends Condition {
 
 	@Override
 	public boolean fulfilledBy(Context context) {
-		return (context.train == train) != inverted;
+		return (context.train() == train) != inverted;
 	}
 	
 	@Override
 	public JSONObject json() {
-		return super.json().put(REALM_TRAIN, train.id);
+		return super.json().put(REALM_TRAIN, train.id());
 	}
 	
 	public Condition load(JSONObject json) {
 		super.load(json);
-		train(Train.get(json.getInt(REALM_TRAIN)));
+		train(Train.get(new Id(json.getString(REALM_TRAIN))));
 		return this;
 	}
 	
@@ -52,7 +51,7 @@ public class TrainSelect extends Condition {
 	@Override
 	protected Object update(HashMap<String, String> params) {
 		if (!params.containsKey(TRAIN)) return t("No train id passed to TrainSelect.update()!");
-		int tid = Integer.parseInt(params.get(TRAIN));
+		Id tid = new Id(params.get(TRAIN));
 		Train train = Train.get(tid);
 		if (train == null) return t("No train with id {} found!",tid);
 		this.train = train;

src/main/java/de/srsoftware/web4rail/moving/Car.java

@@ -32,7 +32,7 @@ import de.srsoftware.web4rail.tags.TextArea;
 
 public class Car extends BaseClass implements Comparable<Car>{
 	protected static final Logger LOG = LoggerFactory.getLogger(Car.class);
-	static HashMap<Integer,Car> cars = new HashMap<Integer, Car>();
+	static HashMap<Id,Car> cars = new HashMap<Id, Car>();
 	
 	public static final String NAME = "name";
 	private static final String LENGTH = "length";
@@ -41,7 +41,6 @@ public class Car extends BaseClass implements Comparable<Car>{
 	private static final String MAX_SPEED = "max_speed";
 	protected HashSet<String> tags = new HashSet<String>();
 	
-	private int id;
 	private String name;
 	public int length;
 	protected String stockId = "";
@@ -54,14 +53,9 @@ public class Car extends BaseClass implements Comparable<Car>{
 		this(name,null);
 	}
 	
-	public Car(String name, Integer id) {
+	public Car(String name, Id id) {
 		this.name = name;
-		if (id == null) {
-			try { // make sure multiple consecutive creations get different ids
-				Thread.sleep(1);
-			} catch (InterruptedException e) {}
-			id = Application.createId();
-		}
+		if (isNull(id)) id = new Id();
 		this.id = id;
 		cars.put(id, this);
 	}	
@@ -100,12 +94,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 	}
 
 	public static Car get(Object id) {		
-		return isNull(id) ? null : cars.get(Integer.parseInt(""+id)); // try to get by id
-	}
-
-	
-	public int id() {
-		return id;
+		return isNull(id) ? null : cars.get(new Id(""+id)); // try to get by id
 	}
 	
 	public JSONObject json() {
@@ -130,7 +119,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 	public Tag link(String...args) {
 		String tx = args.length<1 ? name()+NBSP : args[0];
 		String type = args.length<2 ? "span" : args[1];
-		return link(type, Map.of(REALM,REALM_CAR,ID,id,ACTION,ACTION_PROPS), tx);
+		return link(type, tx);
 	}
 	
 	static Vector<Car> list() {
@@ -148,7 +137,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 		while (line != null) {
 			JSONObject json = new JSONObject(line);
 			String name = json.getString(Car.NAME);
-			int id = json.getInt(ID);
+			Id id = Id.from(json);
 			Car car = json.has(Locomotive.LOCOMOTIVE) ? new Locomotive(name, id) : new Car(name,id);
 			car.load(json).plan(plan);
 			
@@ -158,7 +147,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 	}
 	
 	protected Car load(JSONObject json) {
-		if (json.has(ID)) id = json.getInt(ID);
+		if (json.has(ID)) id = Id.from(json);
 		if (json.has(LENGTH)) length = json.getInt(LENGTH);
 		if (json.has(MAX_SPEED)) maxSpeed = json.getInt(MAX_SPEED);
 		if (json.has(NOTES)) notes = json.getString(NOTES);
@@ -249,7 +238,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 
 	public static void saveAll(String filename) throws IOException {
 		BufferedWriter file = new BufferedWriter(new FileWriter(filename));
-		for (Entry<Integer, Car> entry: cars.entrySet()) file.write(entry.getValue().json()+"\n");
+		for (Entry<Id, Car> entry: cars.entrySet()) file.write(entry.getValue().json()+"\n");
 		file.close();
 	}
 	

src/main/java/de/srsoftware/web4rail/moving/Locomotive.java

@@ -39,7 +39,7 @@ public class Locomotive extends Car implements Constants,Device{
 		super(name);
 	}
 	
-	public Locomotive(String name, Integer id) {
+	public Locomotive(String name, Id id) {
 		super(name,id);
 	}
 	
@@ -82,7 +82,7 @@ public class Locomotive extends Car implements Constants,Device{
 	}
 	
 	public static Tag cockpit(Object locoOrTrain) {
-		int id = 0;
+		Id id = null;
 		int speed = 0;
 		String realm = null;
 		Train train = null;
@@ -95,7 +95,7 @@ public class Locomotive extends Car implements Constants,Device{
 		} else if (locoOrTrain instanceof Train) {
 			train = (Train)locoOrTrain;
 			realm = REALM_TRAIN;			
-			id = train.id;
+			id = train.id();
 			speed = train.speed;
 		}
 		

src/main/java/de/srsoftware/web4rail/moving/Train.java

@@ -20,9 +20,7 @@ import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
-import de.srsoftware.web4rail.Application;
 import de.srsoftware.web4rail.BaseClass;
 import de.srsoftware.web4rail.PathFinder;
 import de.srsoftware.web4rail.Plan;
@@ -30,7 +28,6 @@ import de.srsoftware.web4rail.Plan.Direction;
 import de.srsoftware.web4rail.Range;
 import de.srsoftware.web4rail.Route;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.tags.Button;
 import de.srsoftware.web4rail.tags.Checkbox;
 import de.srsoftware.web4rail.tags.Fieldset;
@@ -49,9 +46,8 @@ public class Train extends BaseClass implements Comparable<Train> {
 	private static final String CAR_ID  = "carId";
 	public  static final String LOCO_ID = "locoId";
 	private static final String TRACE   = "trace";
-	private static final HashMap<Integer, Train> trains = new HashMap<>();
+	private static final HashMap<Id, Train> trains = new HashMap<>();
 	public static final String ID = "id";
-	public int id;
 
 	private static final String NAME = "name";
 	private String name = null;
@@ -117,8 +113,8 @@ public class Train extends BaseClass implements Comparable<Train> {
 		this(loco,null);
 	}
 	
-	public Train(Locomotive loco, Integer id) {
-		if (isNull(id)) id = Application.createId();
+	public Train(Locomotive loco, Id id) {
+		if (isNull(id)) id = new Id();
 		this.id = id;
 		add(loco);
 		trains.put(id, this);
@@ -136,7 +132,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 			}
 			return t("No train id passed!");
 		}
-		int id = Integer.parseInt(params.get(Train.ID));
+		Id id = Id.from(params);
 		Train train = trains.get(id);
 		if (isNull(train)) return(t("No train with id {}!",id));
 		switch (action) {
@@ -320,7 +316,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 		return properties();
 	}
 		
-	public static Train get(int id) {
+	public static Train get(Id id) {
 		return trains.get(id);
 	}
 	
@@ -344,15 +340,15 @@ public class Train extends BaseClass implements Comparable<Train> {
 		if (isSet(route)) json.put(ROUTE, route.id());
 		if (isSet(direction)) json.put(DIRECTION, direction);
 
-		Vector<Integer> locoIds = new Vector<Integer>();
+		Vector<Id> locoIds = new Vector<Id>();
 		for (Locomotive loco : locos) locoIds.add(loco.id());
 		json.put(LOCOS, locoIds);
 		
-		Vector<Integer> carIds = new Vector<Integer>();
+		Vector<Id> carIds = new Vector<Id>();
 		for (Car car : cars) carIds.add(car.id());
 		json.put(CARS,carIds);
 		
-		Vector<String> tileIds = new Vector<String>();
+		Vector<Id> tileIds = new Vector<Id>();
 		for (Tile tile : trace) tileIds.add(tile.id());
 		json.put(TRACE, tileIds);
 		
@@ -377,7 +373,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 	public Tag link(String...args) {
 		String tx = args.length<1 ? name()+NBSP : args[0];
 		String type = args.length<2 ? "span" : args[1];
-		return link(type, Map.of(REALM,REALM_TRAIN,ID,id,ACTION,ACTION_PROPS), tx);
+		return link(type, tx);
 	}
 	
 	public static TreeSet<Train> list() {
@@ -390,9 +386,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 		while (isSet(line)) {
 			JSONObject json = new JSONObject(line);
 			
-			int id = json.getInt(ID);
-			
-			Train train = new Train(null,id);
+			Train train = new Train(null,Id.from(json));
 			train.plan(plan).load(json);			
 			
 			line = file.readLine();
@@ -405,8 +399,8 @@ public class Train extends BaseClass implements Comparable<Train> {
 		if (json.has(DIRECTION)) direction = Direction.valueOf(json.getString(DIRECTION));
 		if (json.has(NAME)) name = json.getString(NAME);
 		if (json.has(TAGS))  json.getJSONArray(TAGS ).forEach(elem -> {  tags.add(elem.toString()); });
-		if (json.has(TRACE)) json.getJSONArray(TRACE).forEach(elem -> {  trace.add(plan.get(elem.toString(), false).set(this)); });
-		if (json.has(BLOCK)) currentBlock = (Block) plan.get(json.getString(BLOCK), false).set(this); // do not move this up! during set, other fields will be referenced!
+		if (json.has(TRACE)) json.getJSONArray(TRACE).forEach(elem -> {  trace.add(plan.get(new Id(elem.toString()), false).set(this)); });
+		if (json.has(BLOCK)) currentBlock = (Block) plan.get(new Id(json.getString(BLOCK)), false).set(this); // do not move this up! during set, other fields will be referenced!
 		for (Object id : json.getJSONArray(CARS)) add(Car.get(id));
 		for (Object id : json.getJSONArray(LOCOS)) add((Locomotive) Car.get(id));
 		return this;
@@ -516,7 +510,8 @@ public class Train extends BaseClass implements Comparable<Train> {
 		return this;
 	}
 	
-	public Tag properties() {
+	@Override
+	public Window properties() {
 		Window window = new Window("train-properties",t("Properties of {}",this));
 		
 		Locomotive.cockpit(this).addTo(window);
@@ -547,14 +542,12 @@ public class Train extends BaseClass implements Comparable<Train> {
 		if (isNull(destination)) {
 			new Button(t("Select from plan"),"return selectDest("+id+");").addTo(dest);			
 		} else {
-			link("span",Map.of(REALM,REALM_PLAN,ID,destination.id(),ACTION,ACTION_CLICK),destination.toString()).addTo(dest);
+			link("span",destination,Map.of(REALM,REALM_PLAN,ID,destination.id().toString(),ACTION,ACTION_CLICK)).addTo(dest);
 			new Button(t("Drop"),Map.of(REALM,REALM_TRAIN,ID,id,ACTION,ACTION_MOVE,DESTINATION,"")).addTo(dest);
 		}
 		
 		dest.addTo(propList);		
-		if (isSet(route)) {
-			link("li", Map.of(REALM,REALM_ROUTE,ID,route.id(),ACTION,ACTION_PROPS), route).addTo(propList);
-		}
+		if (isSet(route)) link("li", route).addTo(propList);
 		int ms = maxSpeed();
 		if (ms < Integer.MAX_VALUE) new Tag("li").content(t("Max. Speed")+": "+maxSpeed()+NBSP+speedUnit).addTo(propList);
 		
@@ -594,7 +587,10 @@ public class Train extends BaseClass implements Comparable<Train> {
 	}
 	
 	public void reserveNext() {
-		Context context = new Context(null, route, this, route.endBlock(), route.endDirection);
+		Context context = new Context(this)
+				.route(route)
+				.block(route.endBlock())
+				.direction(route.endDirection);
 		Route nextRoute = PathFinder.chooseRoute(context);
 		if (isNull(nextRoute)) return;
 		
@@ -622,7 +618,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 
 	public static void saveAll(String filename) throws IOException {
 		BufferedWriter file = new BufferedWriter(new FileWriter(filename));
-		for (Entry<Integer, Train> entry:trains.entrySet()) {
+		for (Entry<Id, Train> entry:trains.entrySet()) {
 			Train train = entry.getValue();
 			file.write(train.json()+"\n");
 		}
@@ -653,7 +649,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 			destination = null;
 			return t("Dropped destination of {}.",this);
 		}
-		Tile tile = plan.get(dest, true);
+		Tile tile = plan.get(new Id(dest), true);
 		if (isNull(tile)) return t("Tile {} not known!",dest);
 		if (tile instanceof Block) {
 			destination = (Block) tile;
@@ -782,11 +778,6 @@ public class Train extends BaseClass implements Comparable<Train> {
 		return properties();
 	}
 
-	private static String t(String message, Object...fills) {
-		return Translation.get(Application.class, message, fills);
-	}
-	
-
 	public SortedSet<String> tags() {
 		TreeSet<String> list = new TreeSet<String>(tags);
 		for (Locomotive loco : locos) list.addAll(loco.tags());

src/main/java/de/srsoftware/web4rail/tiles/Block.java

@@ -151,7 +151,7 @@ public abstract class Block extends StretchableTile implements Comparable<Block>
 		return this;
 	}
 	
-	public static Block get(String blockId) {
+	public static Block get(Id blockId) {
 		Tile tile = plan.get(blockId, false);
 		if (tile instanceof Block) return (Block) tile;
 		return null;
@@ -195,7 +195,7 @@ public abstract class Block extends StretchableTile implements Comparable<Block>
 	public Tag link(String...args) {
 		String tx = args.length<1 ? name+NBSP : args[0];
 		String type = args.length<2 ? "span" : args[1];
-		return link(type, Map.of(REALM,REALM_PLAN,ID,id(),ACTION,ACTION_PROPS), tx).clazz("link","block");
+		return link(type, tx).clazz("link","block");
 	}
 	
 	@Override
@@ -267,7 +267,7 @@ public abstract class Block extends StretchableTile implements Comparable<Block>
 			new Input("min."+wt.tag+"."+dB,wt.get(dB).min).numeric().addTo(new Tag("td")).addTo(row);
 			new Input("max."+wt.tag+"."+dB,wt.get(dB).max).numeric().addTo(new Tag("td")).addTo(row);
 			Tag actions = new Tag("td");
-			Map<String, String> props = Map.of(REALM,REALM_PLAN,ID,id(),ACTION,ACTION_TIMES);
+			Map<String, String> props = Map.of(REALM,REALM_PLAN,ID,id().toString(),ACTION,ACTION_TIMES);
 			switch (count) {
 				case 1: 
 					actions.content(""); break;
@@ -348,8 +348,8 @@ public abstract class Block extends StretchableTile implements Comparable<Block>
 	public Tile update(HashMap<String, String> params) throws IOException {		
 		if (params.containsKey(NAME)) name=params.get(NAME);
 		if (params.containsKey(Train.class.getSimpleName())) {
-			int trainId = Integer.parseInt(params.get(Train.class.getSimpleName()));
-			if (trainId == 0) {
+			Id trainId = Id.from(params,Train.class.getSimpleName());
+			if (trainId == null) { // TODO: this is rubbish
 				if (isSet(train)) train.dropTrace();
 				train = null;
 			} else {

src/main/java/de/srsoftware/web4rail/tiles/Bridge.java

@@ -6,7 +6,6 @@ import java.util.Map;
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Connector;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.tags.Button;
 
 public abstract class Bridge extends Tile {
 	private static Bridge pendingConnection = null;
@@ -37,10 +36,9 @@ public abstract class Bridge extends Tile {
 	@Override
 	public Window propMenu() {
 		Window win = super.propMenu();
-		Map<String, String> props = Map.of(REALM,REALM_PLAN,ID,id(),ACTION,ACTION_CONNECT);
 		new Tag("h4").content("Counterpart").addTo(win);
 		new Tag("p").content(isSet(counterpart) ? t("Connected to {}.",counterpart) : t("Not connected to other bridge part!")).addTo(win);
-		new Button(t("Select counterpart"), props).addTo(win);
+		button(t("Select counterpart"),Map.of(ACTION,ACTION_CONNECT)).addTo(win);
 		return win;
 	}
 

src/main/java/de/srsoftware/web4rail/tiles/Contact.java

@@ -11,9 +11,7 @@ import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Window;
-import de.srsoftware.web4rail.actions.Action.Context;
 import de.srsoftware.web4rail.actions.ActionList;
-import de.srsoftware.web4rail.tags.Button;
 import de.srsoftware.web4rail.tags.Form;
 import de.srsoftware.web4rail.tags.Input;
 import de.srsoftware.web4rail.tags.Label;
@@ -22,7 +20,7 @@ import de.srsoftware.web4rail.tags.Select;
 public class Contact extends Tile{
 	
 	private static final String ADDRESS = "address";
-	private static final HashMap<String, Contact> contactsById = new HashMap<String, Contact>();
+	private static final HashMap<Id, Contact> contactsById = new HashMap<Id, Contact>();
 	private static final HashMap<Integer, Contact> contactsByAddr = new HashMap<Integer, Contact>();
 	private boolean state = false;
 	private String trigger = null;
@@ -101,7 +99,7 @@ public class Contact extends Tile{
 		return contactsByAddr.get(addr);
 	}
 	
-	public static Contact get(String contactId) {
+	public static Contact get(Id contactId) {
 		return contactsById.get(contactId);
 	}
 	
@@ -135,7 +133,7 @@ public class Contact extends Tile{
 	
 	public static Object process(HashMap<String, String> params) {
 		String action = params.get(ACTION);
-		String id = params.get(ID);
+		Id id = Id.from(params);
 		if (action == null) return t("Missing ACTION on call to {}.process()",Contact.class.getSimpleName());
 		Contact contact;
 		switch (action) {
@@ -157,9 +155,7 @@ public class Contact extends Tile{
 		Form form = super.propForm(formId);
 		new Tag("h4").content(t("Hardware settings")).addTo(form);
 		Tag label = new Input(ADDRESS, addr).numeric().addTo(new Label(t("Address:")+NBSP));
-		Map<String, String> props = Map.of(REALM,REALM_CONTACT,ID,id(),ACTION,ACTION_ANALYZE);
-		new Button(t("learn"), props).addTo(label).addTo(form);
-		
+		button(t("learn"),Map.of(ACTION,ACTION_ANALYZE)).addTo(label).addTo(form);		
 		return form;
 	}
 	

src/main/java/de/srsoftware/web4rail/tiles/Relay.java

@@ -38,7 +38,7 @@ public class Relay extends Tile implements Device{
 	private String name = t("Relay");
 	protected boolean state = true;
 	
-	private static final HashMap<String,Relay> relays = new HashMap<String, Relay>();
+	private static final HashMap<Id,Relay> relays = new HashMap<Id, Relay>();
 	public static final boolean STATE_A = true,STATE_B=false;
 	private static final String LABEL_A = "label_a";
 	private static final String LABEL_B = "label_b";
@@ -242,7 +242,7 @@ public class Relay extends Tile implements Device{
 		return relays.values();
 	}
 
-	public static Relay get(String relayId) {
+	public static Relay get(Id relayId) {
 		return relays.get(relayId);
 	}
 }

src/main/java/de/srsoftware/web4rail/tiles/Signal.java

@@ -31,8 +31,8 @@ public abstract class Signal extends Tile implements Comparable<Signal>{
 	
 	@Override
 	public int compareTo(Signal other) {
-		String tid = this.id();
-		String oid = other.id();
+		Id tid = this.id();
+		Id oid = other.id();
 		return tid.compareTo(oid);
 	}
 	

src/main/java/de/srsoftware/web4rail/tiles/Tile.java

@@ -19,9 +19,7 @@ import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import de.keawe.tools.translations.Translation;
 import de.srsoftware.tools.Tag;
-import de.srsoftware.web4rail.Application;
 import de.srsoftware.web4rail.BaseClass;
 import de.srsoftware.web4rail.Connector;
 import de.srsoftware.web4rail.Plan;
@@ -101,12 +99,12 @@ public abstract class Tile extends BaseClass{
 		return 1;
 	}
 
-	public String id() {
+	public Id id() {
 		return Tile.id(x, y);
 	}
 	
-	public static String id(int x, int y) {
-		return x+"-"+y;
+	public static Id id(int x, int y) {
+		return new Id(x+"-"+y);
 	}
 	
 	private static void inflate(String clazz, JSONObject json, Plan plan) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException, ClassNotFoundException, IOException {
@@ -131,7 +129,7 @@ public abstract class Tile extends BaseClass{
 		if (isSet(route))     json.put(ROUTE, route.id());
 		if (isSet(oneWay))    json.put(ONEW_WAY, oneWay);
 		if (disabled)         json.put(DISABLED, true);
-		if (isSet(train))     json.put(REALM_TRAIN, train.id);
+		if (isSet(train))     json.put(REALM_TRAIN, train.id());
 		json.put(LENGTH, length);
 		return json;
 	}
@@ -155,7 +153,7 @@ public abstract class Tile extends BaseClass{
 	public Tag link(String...args) {
 		String tx = args.length<1 ? id()+NBSP : args[0];
 		String type = args.length<2 ? "span" : args[1];
-		return link(type, Map.of(REALM,REALM_PLAN,ID,id(),ACTION,ACTION_CLICK), tx);
+		return super.link(type, tx, Map.of(ACTION,ACTION_CLICK));
 	}
 	
 	
@@ -216,7 +214,7 @@ public abstract class Tile extends BaseClass{
 		Window window = new Window("tile-properties",t("Properties of {} @ ({},{})",title(),x,y));
 		
 		if (isSet(train)) {
-			HashMap<String, Object> props = new HashMap<String,Object>(Map.of(REALM,REALM_TRAIN,ID,train.id));
+			HashMap<String, Object> props = new HashMap<String,Object>(Map.of(REALM,REALM_TRAIN,ID,train.id()));
 			if (isSet(train.route)) {
 				props.put(ACTION, ACTION_STOP);
 				window.children().insertElementAt(new Button(t("stop"),props), 1);
@@ -236,7 +234,7 @@ public abstract class Tile extends BaseClass{
 			window.children().insertElementAt(new Tag("h4").content(t("Train:")), 1);
 		}
 
-		if (isSet(route)) link("p",Map.of(REALM,REALM_ROUTE,ID,route.id(),ACTION,ACTION_PROPS),t("Locked by {}",route)).addTo(window);
+		if (isSet(route)) link("p",t("Locked by {}",route)).addTo(window);
 
 		Form form = propForm("tile-properties-"+id());
 		if (isTrack) {
@@ -295,7 +293,7 @@ public abstract class Tile extends BaseClass{
 		return routes;
 	}
 	
-	public static void saveAll(HashMap<String, Tile> tiles ,String filename) throws IOException {
+	public static void saveAll(HashMap<Id, Tile> tiles ,String filename) throws IOException {
 		BufferedWriter file = new BufferedWriter(new FileWriter(filename));
 		for (Tile tile : tiles.values()) {
 			if (isNull(tile) || tile instanceof Shadow) continue;
@@ -317,10 +315,6 @@ public abstract class Tile extends BaseClass{
 		return plan.place(this);
 	}
 
-	protected static String t(String txt, Object...fills) {
-		return Translation.get(Application.class, txt, fills);
-	}
-
 	public Tag tag(Map<String,Object> replacements) throws IOException {
 		int width = 100*width();
 		int height = 100*height();
@@ -329,7 +323,7 @@ public abstract class Tile extends BaseClass{
 		replacements.put("%height%",height);
 		String style = "";
 		Tag svg = new Tag("svg")
-				.id(isSet(x) && isSet(y) ? id() : getClass().getSimpleName())
+				.id(isSet(x) && isSet(y) ? id().toString() : getClass().getSimpleName())
 				.clazz(classes())
 				.size(100,100)
 				.attr("name", getClass().getSimpleName())