NSidedModifiedDieConfig.java

/*
 *  Initiative - A role playing utility to track turns
 *
 *  This library 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 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package gmgen.plugin.dice;


import java.text.MessageFormat;
import java.util.Random;
import java.util.stream.IntStream;

class NSidedModifiedDieConfig implements DiceConfig
{
	private final int n;
	private final int sides;
	private final int bias;

	NSidedModifiedDieConfig(final int n, final int sides, final int bias, final Random random)
	{
		this.n = n;
		this.sides = sides;
		this.bias = bias;
	}

	@Override
	public int roll()
	{
		return IntStream.generate(() -> Die.rand.nextInt(sides) + 1)
		                .map(v -> v + bias)
		                .limit(n)
		                .sum();
	}

	@Override
	public String toFormula()
	{
		if (bias == 0)
		{
			return MessageFormat.format("{0}d{1}", n, sides);
		}
		return MessageFormat.format("{0}d{1} + {2}", n, sides, bias);
	}
}