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Think Machine - A Fading Suns character generator (random character creation)
There is a newer version: 0.10.5
package com.softwaremagico.tm.character.skills;

/*-
 * #%L
 * Think Machine (Core)
 * %%
 * Copyright (C) 2017 - 2018 Softwaremagico
 * %%
 * This software is designed by Jorge Hortelano Otero. Jorge Hortelano Otero
 *  Valencia (Spain).
 *  
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 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 Public License for more
 * details.
 *  
 * You should have received a copy of the GNU General Public License along with
 * this program; If not, see .
 * #L%
 */

import java.util.HashSet;
import java.util.Set;

import com.softwaremagico.tm.InvalidXmlElementException;
import com.softwaremagico.tm.character.CharacterPlayer;
import com.softwaremagico.tm.chracter.xp.ElementCannotBeUpgradeWithExperienceException;
import com.softwaremagico.tm.chracter.xp.Experience;
import com.softwaremagico.tm.chracter.xp.NotEnoughExperienceException;
import com.softwaremagico.tm.log.RandomGenerationLog;
import com.softwaremagico.tm.random.exceptions.InvalidRandomElementSelectedException;
import com.softwaremagico.tm.random.selectors.IRandomPreference;
import com.softwaremagico.tm.random.selectors.SpecializationPreferences;

public class RandomSkillExperience extends RandomSkills {

	public RandomSkillExperience(CharacterPlayer characterPlayer, Set preferences) throws InvalidXmlElementException {
		super(characterPlayer, preferences, new HashSet(), new HashSet());
	}

	@Override
	protected void assignIfMandatory(AvailableSkill skill) throws InvalidXmlElementException {
		// Nothing
	}

	@Override
	protected void assignMandatoryValues(Set mandatoryValues) throws InvalidXmlElementException {
		// Nothing
	}

	@Override
	public void assign() throws InvalidXmlElementException, InvalidRandomElementSelectedException {
		// Meanwhile are XP to expend.
		while (getCharacterPlayer().getExperienceExpended() < (getCharacterPlayer().getExperienceEarned() - 1)
				&& getWeightedElements().size() > 0) {
			// Select a skill randomly.
			final AvailableSkill selectedSkill = selectElementByWeight();
			final int newValue = getCharacterPlayer().getSkillAssignedRanks(selectedSkill)
					+ getCharacterPlayer().getExperienceIncrease(selectedSkill).size() + 1;
			try {
				if (getCharacterPlayer().getExperienceExpended() + Experience.getExperienceCostFor(selectedSkill, newValue) <= getCharacterPlayer()
						.getExperienceEarned()) {
					RandomGenerationLog
							.debug(this.getClass().getName(),
									"Spent '"
											+ Experience.getExperienceCostFor(selectedSkill, newValue)
											+ "' experience points on '"
											+ selectedSkill
											+ "'. Remaining experience '"
											+ (getCharacterPlayer().getExperienceEarned() - getCharacterPlayer().getExperienceExpended() - Experience
													.getExperienceCostFor(selectedSkill, newValue)) + "'.");
					getCharacterPlayer().setExperienceIncreasedRanks(selectedSkill, 1);
				} else {
					// Remove skill from options to avoid adding more ranks.
					removeElementWeight(selectedSkill);
				}
			} catch (ElementCannotBeUpgradeWithExperienceException e) {
				throw new InvalidRandomElementSelectedException(e.getMessage(), e);
			} catch (NotEnoughExperienceException e) {
				// Remove skill from options to avoid adding more ranks.
				removeElementWeight(selectedSkill);
			}
		}
	}

	@Override
	protected int getWeight(AvailableSkill skill) throws InvalidRandomElementSelectedException {
		final SpecializationPreferences specializationPreferences = SpecializationPreferences.getSelected(getPreferences());
		if (specializationPreferences.ordinal() > 2) {
			final int totalRanks = getCharacterPlayer().getSkillTotalRanks(skill);
			if (totalRanks > 0) {
				return totalRanks * super.getWeight(skill);
			}
		}
		return super.getWeight(skill);
	}
}