Added UCIReceiver and UCIListner, implemented a part of the UCI protocol

src/dev/kske/chess/game/UCIPlayer.java

@@ -35,6 +35,6 @@ public class UCIPlayer extends Player {
 	}
 
 	public void disconnect() {
-
+		handle.quit();
 	}
 }

src/dev/kske/chess/uci/UCIHandle.java

@@ -1,8 +1,6 @@
 package dev.kske.chess.uci;
 
-import java.io.BufferedReader;
 import java.io.IOException;
-import java.io.InputStreamReader;
 import java.io.PrintWriter;
 
 /**
@@ -14,60 +12,83 @@ import java.io.PrintWriter;
 public class UCIHandle {
 
 	private final Process			process;
-	private final BufferedReader	in;
 	private final PrintWriter		out;
+	private final UCIReceiver	receiver;
 
 	private String name, author;
 
 	public UCIHandle(String enginePath) throws IOException {
 		process	= new ProcessBuilder(enginePath).start();
-		in		= new BufferedReader(new InputStreamReader(process.getInputStream()));
 		out		= new PrintWriter(process.getOutputStream());
+		receiver	= new UCIReceiver(process.getInputStream());
 	}
 
-	public void processInput() {
-		try {
-			while (in.ready())
-				parse(in.readLine());
-		} catch (IndexOutOfBoundsException ex) {
-			System.err.println("Too few arguments were provided!");
-			ex.printStackTrace();
-		} catch (IOException ex) {
-			ex.printStackTrace();
-		}
-	}
-
-	private void parse(String line) {
-		String command = line.substring(0, line.indexOf(' '));
-		switch (command) {
-			case "id":
-				parseId(line.substring(command.length() + 1));
-				break;
-			default:
-				System.err.printf("Unknown command '%s' found!%n", command);
-		}
-	}
-
-	private void parseId(String line) {
-		String	param	= line.substring(line.indexOf(' '));
-		String	arg		= line.substring(param.length() + 1);
-		switch (line) {
-			case "name":
-				name = arg;
-				break;
-			case "author":
-				author = arg;
-				break;
-			default:
-				System.err.printf("Unknown parameter '%s' for command 'id' found!%n", param);
-		}
+	public void start() {
+		uci();
+		new Thread(receiver).start();
 	}
 
+	/**
+	 * Tells the engine to use UCI.
+	 */
 	public void uci() {
 		out.println("uci");
 	}
 
+	/**
+	 * Switches the debug mode of the engine on or off.
+	 * 
+	 * @param debug Enables debugging if set to {@code true}, disables it otherwise
+	 */
+	public void debug(boolean debug) {
+		out.println("debug " + (debug ? "on" : "off"));
+	}
+
+	/**
+	 * Synchronized the engine with the GUI
+	 */
+	public void isready() {
+		out.println("isready");
+	}
+
+	/**
+	 * Registers the engine
+	 * 
+	 * @param name The name the engine should be registered with
+	 * @param code The code the engine should be registered with
+	 */
+	public void register(String name, String code) {
+		out.printf("register %s %s%n", name, code);
+	}
+
+	/**
+	 * Tells the engine to postpone the registration.
+	 */
+	public void registerLater() {
+		out.println("register later");
+	}
+
+	/**
+	 * Stops calculation as soon as possible.
+	 */
+	public void stop() {
+		out.println("stop");
+	}
+
+	/**
+	 * Quits the engine process as soon as possible.
+	 */
+	public void quit() {
+		out.println("quit");
+	}
+
+	/**
+	 * @return The name of the engine
+	 */
 	public String getName() { return name; }
 
+	/**
+	 * @return The author of the engine
+	 */
 	public String getAuthor() { return author; }
 }

src/dev/kske/chess/uci/UCIListener.java

@@ -0,0 +1,104 @@
+package dev.kske.chess.uci;
+
+import java.util.Map;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>UCIListener.java</strong><br>
+ * Created: <strong>19.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public interface UCIListener {
+
+	/**
+	 * Identifies the name of the engine.
+	 * 
+	 * @param name The name of the engine
+	 */
+	void onIdName(String name);
+
+	/**
+	 * Identifies the author of the engine.
+	 * 
+	 * @param author The name of the engine's author
+	 */
+	void onIdAuthor(String author);
+
+	/**
+	 * The engine is ready in UCI mode.
+	 */
+	void onUCIOk();
+
+	/**
+	 * The engine has processed all inputs and is ready for new commands.
+	 */
+	void onReadyOk();
+
+	/**
+	 * The engine has stopped searching and has found the best move.
+	 * 
+	 * @param move The best moves the engine has found
+	 */
+	void onBestMove(String move);
+
+	/**
+	 * The engine has stopped searching and has found the best move.
+	 * 
+	 * @param move       The best move the engine has found
+	 * @param ponderMove The move the engine likes to ponder on
+	 */
+	void onBestMove(String move, String ponderMove);
+
+	/**
+	 * The engine will check the copy protection now.
+	 */
+	void onCopyProtectionChecking();
+
+	/**
+	 * The engine has successfully checked the copy protection.
+	 */
+	void onCopyProtectionOk();
+
+	/**
+	 * The engine has encountered an error during copy protection checking.
+	 */
+	void onCopyProtectionError();
+
+	/**
+	 * The engine will check the registration now.
+	 */
+	void onRegistrationChecking();
+
+	/**
+	 * The engine has successfully checked the registration.
+	 */
+	void onRegistrationOk();
+
+	/**
+	 * The engine has encountered an error during registration checking.
+	 */
+	void onRegistrationError();
+
+	/**
+	 * The engine sends information to the GUI.
+	 * 
+	 * @param additionalInfo Contains all pieces of information to be sent
+	 */
+	void onInfo(Map<String, String> additionalInfo);
+
+	/**
+	 * Tells the GUI which parameters can be changed in the engine.
+	 * 
+	 * @param name       The name of the option
+	 * @param type       The GUI component through which the option should be set
+	 * @param defaultVal The default value of this parameter
+	 * @param minVal     The minimum value of this parameter
+	 * @param maxVal     The maximum value of this parameter
+	 * @param var        A predefined value of this parameter
+	 */
+	void onOption(String name, GUIType type, String defaultVal, String minVal, String maxVal, String var);
+
+	public static enum GUIType {
+		CHECK, SPIN, COMBO, BUTTON, STRING
+	}
+}

src/dev/kske/chess/uci/UCIReceiver.java

@@ -0,0 +1,111 @@
+package dev.kske.chess.uci;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>UCIReceiver.java</strong><br>
+ * Created: <strong>19.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class UCIReceiver implements Runnable {
+
+	private final BufferedReader in;
+
+	private UCIListener listener;
+
+	public UCIReceiver(InputStream in) {
+		this.in = new BufferedReader(new InputStreamReader(in));
+	}
+
+	@Override
+	public void run() {
+		try {
+			while (in.ready())
+				parse(in.readLine());
+		} catch (IndexOutOfBoundsException ex) {
+			System.err.println("Too few arguments were provided!");
+			ex.printStackTrace();
+		} catch (IOException ex) {
+			ex.printStackTrace();
+		}
+	}
+
+	private void parse(String line) {
+		String command = line.substring(0, line.indexOf(' '));
+		switch (command) {
+			case "id":
+				parseId(line.substring(command.length() + 1));
+				break;
+			case "uciok":
+				listener.onUCIOk();
+				break;
+			case "readyok":
+				listener.onReadyOk();
+				break;
+			// TODO: bestmove
+			case "copyprotection":
+				parseCopyProtection(line.substring(command.length() + 1));
+				break;
+			case "registration":
+				parseRegistration(line.substring(command.length() + 1));
+				break;
+			// TODO: info
+			// TODO: option
+			default:
+				System.err.printf("Unknown command '%s' found!%n", command);
+		}
+	}
+
+	private void parseId(String line) {
+		String	param	= line.substring(line.indexOf(' '));
+		String	arg		= line.substring(param.length() + 1);
+		switch (line) {
+			case "name":
+				listener.onIdName(arg);
+				break;
+			case "author":
+				listener.onIdAuthor(arg);
+				break;
+			default:
+				System.err.printf("Unknown parameter '%s' for command 'id' found!%n", param);
+		}
+	}
+
+	private void parseCopyProtection(String line) {
+		switch (line) {
+			case "checking":
+				listener.onCopyProtectionChecking();
+				break;
+			case "ok":
+				listener.onCopyProtectionOk();
+				break;
+			case "error":
+				listener.onCopyProtectionError();
+				break;
+			default:
+				System.err.printf("Unknown parameter '%s' for command 'copyprotection' found!%n", line);
+		}
+	}
+
+	private void parseRegistration(String line) {
+		switch (line) {
+			case "checking":
+				listener.onRegistrationChecking();
+				break;
+			case "ok":
+				listener.onRegistrationOk();
+				break;
+			case "error":
+				listener.onRegistrationError();
+				break;
+			default:
+				System.err.printf("Unknown parameter '%s' for command 'registration' found!%n", line);
+		}
+	}
+
+	public void setListener(UCIListener listener) { this.listener = listener; }
+}