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Jill cognitive agents (examples)

There is a newer version: 0.4.0

package io.github.agentsoz.jill.example.hanoi;

/*
 * #%L
 * Jill Cognitive Agents Platform
 * %%
 * Copyright (C) 2014 - 2015 by its authors. See AUTHORS file.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import io.github.agentsoz.jill.util.Log;

import java.util.ArrayList;
import java.util.Random;

public class Board {
	
	@SuppressWarnings("unchecked")
	ArrayList[] pins = (ArrayList[])(new ArrayList[3]);
	
	public Board(Random rand, int ndiscs) {
		for (int i = 0; i < pins.length; i++) {
			pins[i] = new ArrayList();
		}
		for (int i = ndiscs; i > 0; i--) {
			pins[0].add(i);
		}
		
	}

	/** 
	 * Move a disc from pin a to pin b
	 * @return true if the move was made, false otherwise
	 */
	public boolean move (int a, int b) {
		// Nothing to do if the pin number is invalid
		if (a < 0 || a >= pins.length || b < 0 || b >= pins.length) {
			Log.warn("Invalid board pin specified " + a + ". Should be between 0.."+(pins.length-1)+" (inclusive).");
			return false;
		} else if (pins[a].isEmpty()) {
			Log.warn("No disc on pin" + a);
			return false;
		} else if (a == b) {
			Log.info("Moving disc from pin" + a + " on to itself (means the board will not change)");
			return true;
		}
		int discOnA = pins[a].get(pins[a].size()-1);
		int discOnB = (pins[b].isEmpty()) ? Integer.MAX_VALUE : pins[b].get(pins[b].size()-1);
		if (discOnB < discOnA) {
			Log.warn("Cannot move disc" + discOnA + " (pin"+a+") on to smaller disc" + discOnB + " (pin"+b+")");
			return false;
		}
		pins[b].add(pins[a].remove(pins[a].size()-1));
		return true;
	}
	
	public String toString() {
		String s = "";
		if (pins.length == 0) { return s; }
		for (int i = 0; i < pins.length; i++) {
			if (pins[i].isEmpty()) {
				s += "|";
			}
			for(Integer j : pins[i]) {
				s += "|" + j;
			}
			s += "\n";
		}
		return s.substring(0, s.length()-1);
	}

}