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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;

/*-
 * #%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 com.softwaremagico.tm.InvalidXmlElementException;
import com.softwaremagico.tm.character.benefices.BeneficeSpecialization;
import com.softwaremagico.tm.character.exceptions.RestrictedElementException;
import com.softwaremagico.tm.character.exceptions.UnofficialElementNotAllowedException;
import com.softwaremagico.tm.character.factions.FactionGroup;
import com.softwaremagico.tm.character.factions.FactionsFactory;
import com.softwaremagico.tm.character.races.InvalidRaceException;
import com.softwaremagico.tm.random.RandomSelector;
import com.softwaremagico.tm.random.exceptions.InvalidRandomElementSelectedException;
import com.softwaremagico.tm.random.selectors.IRandomPreference;
import com.softwaremagico.tm.random.selectors.NamesPreferences;

import java.util.Collection;
import java.util.Objects;
import java.util.Set;

public class RandomName extends RandomSelector {

    public RandomName(CharacterPlayer characterPlayer, Set> preferences)
            throws InvalidXmlElementException, RestrictedElementException, UnofficialElementNotAllowedException {
        super(characterPlayer, preferences);
    }

    @Override
    public void assign() throws InvalidRaceException, InvalidRandomElementSelectedException {
        if (getCharacterPlayer().getFaction() == null || getCharacterPlayer().getRace() == null || getCharacterPlayer().getInfo().getPlanet() == null) {
            throw new InvalidRandomElementSelectedException("Please, set faction, race and planet first.");
        }
        NamesPreferences namesPreference = NamesPreferences.getSelected(getPreferences());
        final BeneficeSpecialization status = getCharacterPlayer().getStatus();
        // Nobility with more names. Unless set by the user.
        if (status != null && namesPreference == NamesPreferences.LOW
                && !getPreferences().contains(NamesPreferences.LOW)) {
            namesPreference = NamesPreferences.getByStatus(status.getCost());
        }

        for (int i = 0; i < namesPreference.randomGaussian(); i++) {
            try {
                final Name selectedName = selectElementByWeight();
                getCharacterPlayer().getInfo().addName(selectedName);
                removeElementWeight(selectedName);
                // Remove names from different factions. All names must be from
                // same faction
                for (final Name name : FactionsFactory.getInstance().getAllNames()) {
                    if (!Objects.equals(name.getFaction(), selectedName.getFaction())) {
                        removeElementWeight(name);
                    }
                }
            } catch (InvalidRandomElementSelectedException e) {
                throw new InvalidRandomElementSelectedException("No possible name for faction '"
                        + getCharacterPlayer().getFaction() + "' at '" + getCharacterPlayer().getInfo().getPlanet()
                        + "'.", e);
            }
        }
    }

    @Override
    protected Collection getAllElements() throws InvalidXmlElementException {
        return FactionsFactory.getInstance().getAllNames();
    }

    @Override
    protected int getWeight(Name name) throws InvalidRandomElementSelectedException {
        // Only names of its gender.
        if (!name.getGender().equals(getCharacterPlayer().getInfo().getGender())) {
            throw new InvalidRandomElementSelectedException("Name '" + name + "' not valid for gender '"
                    + getCharacterPlayer().getInfo().getGender() + "'.");
        }
        // Nobility almost always names of her planet.
        if (getCharacterPlayer().getFaction() != null
                && getCharacterPlayer().getFaction().getFactionGroup() == FactionGroup.NOBILITY &&
                !FactionsFactory.getInstance().getAllNames(getCharacterPlayer().getFaction()).isEmpty()) {
            if (getCharacterPlayer().getFaction().equals(name.getFaction())) {
                return BASIC_PROBABILITY;
            } else {
                throw new InvalidRandomElementSelectedException("Name '" + name
                        + "' not allowed for a nobility based character.");
            }
        }
        // Not nobility, use names available on the planet.
        if (getCharacterPlayer().getInfo().getPlanet() != null
                && !getCharacterPlayer().getInfo().getPlanet().getNames().isEmpty()) {
            //Only human names. Ignore xenos.
            if (getCharacterPlayer().getInfo().getPlanet().getHumanFactions().contains(name.getFaction())) {
                return BASIC_PROBABILITY;
            } else {
                throw new InvalidRandomElementSelectedException("Name '" + name + "' not existing in planet '"
                        + getCharacterPlayer().getInfo().getPlanet() + "'.");
            }
        }
        // Planet without factions. Then choose own faction names
        if (getCharacterPlayer().getFaction() != null
                && !FactionsFactory.getInstance().getAllNames(getCharacterPlayer().getFaction()).isEmpty()
                && !getCharacterPlayer().getFaction().equals(name.getFaction())) {
            throw new InvalidRandomElementSelectedException("Name '" + name + "' from an invalid faction '"
                    + getCharacterPlayer().getFaction() + "'.");
        }

        // Surname already set, use same faction to avoid weird mix.
        if (getCharacterPlayer().getInfo().getSurname() != null) {
            if (getCharacterPlayer().getInfo().getSurname().getFaction() != null &&
                    !Objects.equals(name.getFaction(), getCharacterPlayer().getInfo().getSurname().getFaction())) {
                return 0;
            }
        }

        return BASIC_PROBABILITY;
    }

    @Override
    protected void assignIfMandatory(Name element) throws InvalidXmlElementException {
    }

    @Override
    protected void assignMandatoryValues(Set mandatoryValues) throws InvalidXmlElementException {
    }
}