overhauling save and load routines

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>de.srsoftware</groupId>
 	<artifactId>web4rail</artifactId>
-	<version>0.3.4</version>
+	<version>0.3.5</version>
 	<name>Web4Rail</name>
 	<description>Java Model Railway Control</description>
 	<url>https://github.com/StephanRichter/Web4Rail</url>

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

@@ -15,8 +15,6 @@ import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.HashMap;
-import java.util.Random;
-import java.util.Vector;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -26,9 +24,6 @@ import com.sun.net.httpserver.HttpServer;
 
 import de.keawe.localconfig.Configuration;
 import de.keawe.tools.translations.Translation;
-import de.srsoftware.web4rail.moving.Locomotive;
-import de.srsoftware.web4rail.moving.Train;
-import de.srsoftware.web4rail.tiles.Block;
 
 public class Application {
 	private static Plan plan;
@@ -52,17 +47,7 @@ public class Application {
         } catch (FileNotFoundException e) {
         	plan = new Plan();
 		}
-        Locomotive BR110 = new Locomotive("BR110");
-        Locomotive BR130 = new Locomotive("BR130");
-        Vector<Block> blocks = new Vector<>(plan.blocks());
-        Random rand = new Random();
-        Block block1 = blocks.get(rand.nextInt(blocks.size()));
-        if (block1 != null) block1.train(new Train(BR110));
-        Block block2 = null;
-        do {
-        	block2 = blocks.get(rand.nextInt(blocks.size()));
-        } while (block2 == block1);
-        if (block2 != null) block2.train(new Train(BR130));
+                  
         Desktop.getDesktop().browse(URI.create("http://localhost:"+config.getInt(PORT)+"/plan"));
 	}
 	

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

@@ -1,10 +1,5 @@
 package de.srsoftware.web4rail;
 
-import java.io.BufferedReader;
-import java.io.BufferedWriter;
-import java.io.File;
-import java.io.FileReader;
-import java.io.FileWriter;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.lang.reflect.InvocationTargetException;
@@ -19,7 +14,6 @@ import java.util.Map.Entry;
 import java.util.Stack;
 import java.util.Vector;
 
-import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -46,7 +40,6 @@ import de.srsoftware.web4rail.tiles.EndS;
 import de.srsoftware.web4rail.tiles.EndW;
 import de.srsoftware.web4rail.tiles.Eraser;
 import de.srsoftware.web4rail.tiles.Shadow;
-import de.srsoftware.web4rail.tiles.Signal;
 import de.srsoftware.web4rail.tiles.SignalE;
 import de.srsoftware.web4rail.tiles.SignalN;
 import de.srsoftware.web4rail.tiles.SignalS;
@@ -54,7 +47,6 @@ import de.srsoftware.web4rail.tiles.SignalW;
 import de.srsoftware.web4rail.tiles.StraightH;
 import de.srsoftware.web4rail.tiles.StraightV;
 import de.srsoftware.web4rail.tiles.Tile;
-import de.srsoftware.web4rail.tiles.Turnout;
 import de.srsoftware.web4rail.tiles.Turnout.State;
 import de.srsoftware.web4rail.tiles.Turnout3E;
 import de.srsoftware.web4rail.tiles.TurnoutLE;
@@ -151,7 +143,7 @@ public class Plan {
 			remove(erased);
 			return erased == null ? null : t("Removed {}.",erased);
 		}
-		if (configJson != null) tile.configure(new JSONObject(configJson));		
+		//if (configJson != null) tile.configure(new JSONObject(configJson));		
 		set(x, y, tile);
 		return t("Added {}",tile.getClass().getSimpleName());
 	}
@@ -257,60 +249,14 @@ public class Plan {
 	}
 	
 	public static Plan load(String filename) throws IOException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
-		Plan result = new Plan();
-		File file = new File(filename+".plan");
-		BufferedReader br = new BufferedReader(new FileReader(file));
-		while (br.ready()) {
-			String line = br.readLine().trim();
-			String[] parts = line.split(":",4);
-			try {
-				String x = parts[0];
-				String y = parts[1];
-				String clazz = parts[2];
-				result.addTile(clazz, x, y, parts.length>3 ? parts[3] : null);
-			} catch (Exception e) {
-				LOG.warn("Was not able to load \"{}\":",line,e);
-			}
-		}
-		br.close();
-		file = new File(filename+".routes");
-		if (file.exists()) {
-			br = new BufferedReader(new FileReader(file));
-			while (br.ready()) {
-				String line = br.readLine().trim();
-				String[] parts = line.split("=",2);
-				try {
-					//String id = parts[0];
-					JSONObject json = new JSONObject(parts[1]);
-					Route route = new Route();
-					json.getJSONArray(Route.PATH).forEach(entry -> {
-						JSONObject pos = (JSONObject) entry;
-						Tile tile = result.get(pos.getInt("x"),pos.getInt("y"),false);
-						if (route.path().isEmpty()) {
-							route.start((Block) tile,null);
-						} else {
-							route.add(tile, null);
-						}
-					});
-					json.getJSONArray(Route.SIGNALS).forEach(entry -> {
-						JSONObject pos = (JSONObject) entry;
-						Tile tile = result.get(pos.getInt("x"),pos.getInt("y"),false);
-						route.addSignal((Signal) tile);
-					});
-					json.getJSONArray(Route.TURNOUTS).forEach(entry -> {
-						JSONObject pos = (JSONObject) entry;
-						Tile tile = result.get(pos.getInt("x"),pos.getInt("y"),false);
-						route.addTurnout((Turnout) tile, Turnout.State.valueOf(pos.getString(Turnout.STATE)));
-					});
-					if (json.has(Route.NAME)) route.name(json.getString(Route.NAME));
-					result.registerRoute(route);
-				} catch (Exception e) {
-					LOG.warn("Was not able to load \"{}\":",line,e);
-				}
-			}
-			br.close();
-		} else LOG.debug("{} not found.",file);
-		return result;
+		try {
+			Car.loadAll(filename+".cars");
+			Train.loadAll(filename+".trains");
+		} catch (Exception e) {}
+		Plan plan = new Plan();
+		Tile.loadAll(filename+".plan",plan);
+		Route.loadAll(filename+".routes",plan);
+		return plan;
 	}
 
 	private Tag menu() throws IOException {
@@ -460,16 +406,10 @@ public class Plan {
 	private String saveTo(String name) throws IOException {
 		if (name == null || name.isEmpty()) throw new NullPointerException("Name must not be empty!");
 		Car.saveAll(name+".cars");
-		Tile.saveAll(this.tiles,name+".tiles");
+		Tile.saveAll(tiles,name+".plan");
 		Train.saveAll(name+".trains"); // refers to cars, blocks
-
-		File file = new File(name+".routes");
-		BufferedWriter br = new BufferedWriter(new FileWriter(file));
-		for (Route route: routes.values()) {
-			br.append(route.id()+"="+route.json()+"\n");
-		}
-		br.close();
-		return t("Plan saved as \"{}\".",file);
+		Route.saveAll(routes,name+".routes"); // refers to tiles
+		return t("Plan saved as \"{}\".",name);
 	}
 	
 	public void set(int x,int y,Tile tile) throws IOException {

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

@@ -1,5 +1,7 @@
 package de.srsoftware.web4rail;
 
+import java.io.BufferedWriter;
+import java.io.FileWriter;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.List;
@@ -140,10 +142,10 @@ public class Route {
 
 	
 	public void finish() throws IOException {
-		startBlock.train(null);
-		endBlock.train(train.heading(endDirection.inverse()));
+		startBlock.train(null);		
 		train.route = null;
 		unlock();
+		endBlock.train(train.heading(endDirection.inverse()));
 	}
 	
 	public String id() {
@@ -151,12 +153,12 @@ public class Route {
 			StringBuilder sb = new StringBuilder();
 			for (int i=0; i<path.size();i++) {
 				Tile tile = path.get(i);
-				if (i>0) sb.append(" – ");
+				if (i>0) sb.append("-");
 				if (tile instanceof Block) {
 					sb.append(((Block)tile).name);
 					if (i>0) break; // Kontakt nach dem Ziel-Block nicht mitnehmen
 				} else {
-					sb.append(tile.x+":"+tile.y);
+					sb.append(tile.id());
 				}
 			}
 			id = sb.toString();
@@ -170,22 +172,21 @@ public class Route {
 		}
 		return true;
 	}
-
 		
 	public String json() {
 		JSONObject props = new JSONObject();
-		JSONArray path = new JSONArray();
-		for (Tile t : this.path) path.put(new JSONObject(Map.of("x",t.x,"y",t.y)));
-		props.put(PATH, path);
+		Vector<String> tileIds = new Vector<String>();
+		for (Tile t : this.path) tileIds.add(t.id());
+		props.put(PATH, tileIds);
 		
-		JSONArray signals = new JSONArray();
-		for (Tile t : this.signals) signals.put(new JSONObject(Map.of("x",t.x,"y",t.y)));
-		props.put(SIGNALS, signals);
+		Vector<String> signalIds = new Vector<String>(); // list all signals affecting this route 
+		for (Tile t : this.signals) signalIds.add(t.id());
+		props.put(SIGNALS, signalIds);
 		
 		JSONArray turnouts = new JSONArray();
 		for (Entry<Turnout, State> entry : this.turnouts.entrySet()) {
 			Turnout t = entry.getKey();
-			turnouts.put(new JSONObject(Map.of("x",t.x,"y",t.y,Turnout.STATE,entry.getValue())));
+			turnouts.put(new JSONObject(Map.of(Turnout.ID,t.id(),Turnout.STATE,entry.getValue())));
 		}
 		props.put(TURNOUTS, turnouts);
 		
@@ -193,6 +194,11 @@ public class Route {
 
 		return props.toString();
 	}
+	
+	public static void loadAll(String string, Plan plan) {
+		// TODO Auto-generated method stub
+		
+	}
 
 	public Route lock(Train train) throws IOException {
 		this.train = train;
@@ -278,22 +284,14 @@ public class Route {
 		
 		return form;
 	}
-
-	public Route start(Block block,Direction from) {
-		// add those fields to clone, too!
-		contacts = new Vector<Contact>();
-		signals = new Vector<Signal>();
-		path = new Vector<Tile>();
-		turnouts = new HashMap<>();
-		startBlock = block;
-		startDirection = from;
-		path.add(block);
-		return this;
-	}
-
-	@Override
-	public String toString() {
-		return getClass().getSimpleName()+"("+name()+")";
+	
+	public static void saveAll(HashMap<String, Route> routes, String filename) throws IOException {
+		BufferedWriter file = new BufferedWriter(new FileWriter(filename));
+		for (Entry<String, Route> entry : routes.entrySet()) {
+			Route route = entry.getValue();
+			file.write(route.json()+"\n");
+		}
+		file.close();
 	}
 
 	public void setLast(State state) {
@@ -306,6 +304,18 @@ public class Route {
 		for (Signal signal : signals) signal.state(state == null ? "go" : state);
 		return this;
 	}
+	
+	public Route start(Block block,Direction from) {
+		// add those fields to clone, too!
+		contacts = new Vector<Contact>();
+		signals = new Vector<Signal>();
+		path = new Vector<Tile>();
+		turnouts = new HashMap<>();
+		startBlock = block;
+		startDirection = from;
+		path.add(block);
+		return this;
+	}
 
 	public Block startBlock() {
 		return (Block) path.get(0);
@@ -314,6 +324,11 @@ public class Route {
 	protected static String t(String txt, Object...fills) {
 		return Translation.get(Application.class, txt, fills);
 	}
+
+	@Override
+	public String toString() {
+		return getClass().getSimpleName()+"("+name()+")";
+	}
 	
 	public Route unlock() throws IOException {
 		setSignals(Signal.STOP);

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

@@ -1,6 +1,8 @@
 package de.srsoftware.web4rail.moving;
 
+import java.io.BufferedReader;
 import java.io.BufferedWriter;
+import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.Date;
@@ -13,7 +15,7 @@ public class Car {
 	private static final String ID = "id";
 	private static final String NAME = "name";
 	private static final String LENGTH = "length";
-	private static HashMap<String,Car> cars = new HashMap<String, Car>();
+	static HashMap<String,Car> cars = new HashMap<String, Car>();
 	public int length;
 	private String name;
 	private String id;
@@ -24,9 +26,27 @@ public class Car {
 	
 	public Car(String name, String id) {
 		this.name = name;
-		this.id = id == null ? ""+new Date().getTime() : id;
-		cars.put(this.id, this);
+		if (id == null) {
+			try { // make sure multiple consecutive creations get different ids
+				Thread.sleep(1);
+			} catch (InterruptedException e) {}
+			id = ""+new Date().getTime();
+		}
+		this.id = id;
+		cars.put(id, this);
+	}
+	
+	public static Car get(String nameOrId) {
+		HashMap<String, Car> cs = cars;
+		Car car = cars.get(nameOrId);
+		if (car == null) {
+			for (Car c : cars.values()) {
+				if (c.name.equals(nameOrId)) car = c;
+			}
+		}
+		return car;
 	}
+
 	
 	public String id() {
 		return id;
@@ -44,10 +64,32 @@ public class Car {
 		return name;
 	}
 
+	public static void loadAll(String filename) throws IOException {
+		cars.clear();
+		BufferedReader file = new BufferedReader(new FileReader(filename));
+		String line = file.readLine();
+		while (line != null) {
+			JSONObject json = new JSONObject(line);
+			String name = json.getString(Car.NAME);
+			String id = json.getString(Car.ID);
+			Car car = json.has(Locomotive.LOCOMOTIVE) ? new Locomotive(name, id) : new Car(name,id);
+			car.load(json);
+			
+			line = file.readLine();
+		}
+		file.close();
+	}
+	
+	protected void load(JSONObject json) {
+		if (json.has(ID)) id = json.getString(ID);
+		if (json.has(LENGTH)) length = json.getInt(LENGTH);
+	}
+	
 	public static void saveAll(String filename) throws IOException {
 		BufferedWriter file = new BufferedWriter(new FileWriter(filename));
 		for (Entry<String, Car> entry: cars.entrySet()) {
-			file.write(entry.getValue().json()+"\n");
+			Car c = entry.getValue();
+			file.write(c.json()+"\n");
 		}
 		file.close();
 	}

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

@@ -5,13 +5,17 @@ import org.json.JSONObject;
 public class Locomotive extends Car {
 	
 	private static final String REVERSE = "reverse";
-	private static final String LOCOMOTIVE = "locomotive";
+	public static final String LOCOMOTIVE = "locomotive";
 	private boolean reverse = false;
 
 	public Locomotive(String name) {
 		super(name);
 	}
 	
+	public Locomotive(String name, String id) {
+		super(name,id);
+	}
+
 	@Override
 	public JSONObject json() {
 		JSONObject json = super.json();
@@ -20,7 +24,12 @@ public class Locomotive extends Car {
 		json.put(LOCOMOTIVE, loco);
 		return json;
 	}
-
+	
+	@Override
+	protected void load(JSONObject json) {
+		super.load(json);
+		if (json.has(REVERSE)) reverse = json.getBoolean(REVERSE);
+	}
 	public void setSpeed(int v) {
 		// TODO Auto-generated method stub
 		

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

@@ -1,6 +1,8 @@
 package de.srsoftware.web4rail.moving;
 
+import java.io.BufferedReader;
 import java.io.BufferedWriter;
+import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.Date;
@@ -38,8 +40,6 @@ public class Train {
 	private static final String NAME = "name";
 	private String name = null;
 	
-	private static final String BLOCK = "block";
-	private Block block = null;
 	
 	private static final String ROUTE = "route";
 	public Route route;	
@@ -56,7 +56,8 @@ public class Train {
 	private static final String LOCOS = "locomotives";	
 	private Vector<Locomotive> locos = new Vector<Locomotive>();
 
-
+	private Block block = null;
+		
 	private class Autopilot extends Thread{
 		@Override
 		public void run() {
@@ -90,16 +91,21 @@ public class Train {
 	private Autopilot autopilot = null;
 	
 	public Train(Locomotive loco) {
-		id = new Date().getTime();
+		this(loco,null);
+	}
+	
+	public Train(Locomotive loco, Long id) {
+		if (id == null) id = new Date().getTime();
+		this.id = id;
 		add(loco);
 		trains.put(id, this);
 	}
+
 	
 	private JSONObject json() {
 		JSONObject json = new JSONObject();
 		json.put(ID, id);
 		json.put(NAME,name);
-		if (block != null) json.put(BLOCK, block.id());
 		if (route != null) json.put(ROUTE, route.id());
 		if (direction != null) json.put(DIRECTION, direction);
 		json.put(PUSH_PULL, pushPull);
@@ -154,6 +160,11 @@ public class Train {
 		this.block = block;
 	}
 	
+	public static Train get(long id) {
+		return trains.get(id);
+	}
+
+	
 	public Train heading(Direction dir) {
 		direction = dir;
 		return this;
@@ -165,6 +176,28 @@ public class Train {
 		for (Car car : cars) result += car.length;
 		return result;
 	}
+	
+	public static void loadAll(String filename) throws IOException {
+		BufferedReader file = new BufferedReader(new FileReader(filename));
+		String line = file.readLine();
+		while (line != null) {
+			JSONObject json = new JSONObject(line);
+			
+			long id = json.getLong(ID);
+			
+			Train train = new Train(null,id);
+			train.load(json);			
+			
+			line = file.readLine();
+		}
+		file.close();
+	}
+
+	private void load(JSONObject json) {
+		pushPull = json.getBoolean(PUSH_PULL);
+		for (Object id : json.getJSONArray(LOCOS)) add((Locomotive) Car.get((String)id));
+		for (Object id : json.getJSONArray(CARS)) add(Car.get((String)id));
+	}
 
 	public String name() {
 		String result = (name != null ? name : locos.firstElement().name());

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

@@ -14,11 +14,13 @@ import de.srsoftware.web4rail.tags.Checkbox;
 
 public abstract class Block extends StretchableTile{
 	private static final String NAME = "name";
-	private static final String ALLOW_TURN = "allowTurn";
 	public String name = "Block";
-	private Train train;
+	
+	private static final String ALLOW_TURN = "allowTurn";
 	public boolean turnAllowed = false;
 	
+	private static final String TRAIN = "train";
+	
 	@Override
 	public JSONObject config() {
 		JSONObject config = super.config();
@@ -27,16 +29,31 @@ public abstract class Block extends StretchableTile{
 	}
 	
 	@Override
-	public void configure(JSONObject config) {
-		super.configure(config);
-		if (config.has(NAME)) name = config.getString(NAME);
+	public boolean free() {
+		return train == null && super.free();
 	}
 	
 	@Override
-	public boolean free() {
-		return train == null && super.free();
+	public JSONObject json() {
+		JSONObject json = super.json();
+		json.put(NAME, name);
+		json.put(ALLOW_TURN, turnAllowed);
+		if (train != null) json.put(TRAIN, train.id);
+		return json;
 	}
-
+	
+	@Override
+	protected Tile load(JSONObject json) throws IOException {
+		super.load(json);
+		name = json.has(NAME) ? json.getString(NAME) : "Block";
+		turnAllowed = json.has(ALLOW_TURN) && json.getBoolean(ALLOW_TURN);
+		if (json.has(TRAIN)) {
+			Train tr = Train.get(json.getLong(TRAIN)); 
+			train(tr);
+		}
+		return this;
+	}
+	
 	@Override
 	public Tag propForm() {
 		Tag form = super.propForm();

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

@@ -1,5 +1,6 @@
 package de.srsoftware.web4rail.tiles;
 
+import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map.Entry;
 
@@ -19,9 +20,17 @@ public abstract class StretchableTile extends Tile {
 	}
 	
 	@Override
-	public void configure(JSONObject config) {
-		super.configure(config);
-		if (config.has(LENGTH)) setLength(config.getInt(LENGTH));
+	public JSONObject json() {
+		JSONObject json = super.json();
+		if (length > 1) json.put(LENGTH, length);
+		return json;
+	}
+	
+	@Override
+	protected Tile load(JSONObject json) throws IOException {
+		super.load(json);
+		if (json.has(LENGTH)) length = json.getInt(LENGTH);
+		return this;
 	}
 	
 	@Override

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

@@ -1,9 +1,12 @@
 package de.srsoftware.web4rail.tiles;
 
+import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.File;
+import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
 import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -31,20 +34,20 @@ import de.srsoftware.web4rail.tags.Radio;
 
 public abstract class Tile {
 	
-	private static final String ID = "id";
+	public static final String ID = "id";
 	private static final String TYPE = "type";
 	private static final String LOCKED = "locked";
 	
 	private static final String POS = "pos";
 	private static final String X = "x";
-	private static final Object Y = "y";
+	private static final String Y = "y";
 	public int x = -1,y = -1;
 	
 	private static final String ROUTE = "route";
 	protected Route route;
 	
 	private static final String OCCUPIED = "occupied";
-	private Train train;
+	protected Train train;
 	
 	private static final String ONEW_WAY = "one_way";
 	protected Direction oneWay = null;
@@ -63,17 +66,6 @@ public abstract class Tile {
 		if (train != null) classes.add(OCCUPIED);
 		return classes;
 	}
-	
-	public JSONObject json() {
-		JSONObject json = new JSONObject();
-		json.put(ID, id());
-		json.put(TYPE, getClass().getSimpleName());
-		JSONObject pos = new JSONObject(Map.of(X,x,Y,y));
-		json.put(POS, pos);
-		if (route != null) json.put(ROUTE, route.id());
-		if (oneWay != null) json.put(ONEW_WAY, oneWay);
-		return json;
-	}
 
 	public void add(Route route) {
 		this.routes.add(route);
@@ -95,9 +87,6 @@ public abstract class Tile {
 		return new HashMap<>();
 	}
 
-
-	public void configure(JSONObject config) {}
-	
 	public boolean free() {
 		return route == null;
 	}
@@ -107,20 +96,64 @@ public abstract class Tile {
 	}
 	
 	public String id() {
-		return "tile-"+x+"-"+y;
+		return x+":"+y;
+	}
+	
+	private static void inflate(String clazz, JSONObject json, Plan plan) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException, ClassNotFoundException, IOException {
+		clazz = Tile.class.getName().replace(".Tile", "."+clazz);
+		Tile tile = (Tile) Tile.class.getClassLoader().loadClass(clazz).getDeclaredConstructor().newInstance();
+		tile.plan(plan);
+		tile.load(json);
+		plan.set(tile.x, tile.y, tile);
+	}
+	
+	public JSONObject json() {
+		JSONObject json = new JSONObject();
+		json.put(TYPE, getClass().getSimpleName());
+		JSONObject pos = new JSONObject(Map.of(X,x,Y,y));
+		json.put(POS, pos);
+		if (route != null) json.put(ROUTE, route.id());
+		if (oneWay != null) json.put(ONEW_WAY, oneWay);
+		return json;
 	}
 	
 	public int len() {
 		return 1;
 	}
 	
+	public static void loadAll(String filename, Plan plan) throws IOException {		
+		BufferedReader file = new BufferedReader(new FileReader(filename));
+		String line = file.readLine();
+		while (line != null) {
+			JSONObject json = new JSONObject(line);
+			String clazz = json.getString(TYPE);
+			
+			try {
+				Tile.inflate(clazz,json,plan);
+			} catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException | NoSuchMethodException | SecurityException | ClassNotFoundException e) {
+				e.printStackTrace();
+			}			
+			
+			line = file.readLine();
+		}
+		file.close();
+	}
+
+	protected Tile load(JSONObject json) throws IOException {
+		JSONObject pos = json.getJSONObject(POS);
+		x = pos.getInt(X);
+		y = pos.getInt(Y);
+		return this;
+	}
+	
 	public void lock(Route route) throws IOException {
 		this.route = route;
 		plan.place(this);
 	}
 	
-	public void plan(Plan plan) {
+	public Tile plan(Plan plan) {
 		this.plan = plan;
+		return this;
 	}
 
 	public Tile position(int x, int y) {
@@ -309,4 +342,19 @@ public abstract class Tile {
 		}
 		return this;
 	}
+	
+	/*
+	if (clazz == null) throw new NullPointerException(TILE+" must not be null!");
+	Class<Tile> tc = Tile.class;		
+	clazz = tc.getName().replace(".Tile", "."+clazz);		
+	Tile tile = (Tile) tc.getClassLoader().loadClass(clazz).getDeclaredConstructor().newInstance();
+	if (tile instanceof Eraser) {
+		Tile erased = get(x,y,true);
+		remove(erased);
+		return erased == null ? null : t("Removed {}.",erased);
+	}
+	if (configJson != null) tile.configure(new JSONObject(configJson));		
+	set(x, y, tile);
+	return t("Added {}",tile.getClass().getSimpleName());
+}*/
 }