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/*
 * -----------------------------------------------------------------------
 * Copyright © 2013-2015 Meno Hochschild, 
 * -----------------------------------------------------------------------
 * This file (WeekExtension.java) is part of project Time4J.
 *
 * Time4J 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.
 *
 * Time4J 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 Time4J. If not, see .
 * -----------------------------------------------------------------------
 */

package net.time4j;

import net.time4j.engine.AttributeQuery;
import net.time4j.engine.ChronoElement;
import net.time4j.engine.ChronoEntity;
import net.time4j.engine.ChronoExtension;

import java.util.Collections;
import java.util.Locale;
import java.util.Set;


/**
 * Wochenmodell-Erweiterung. 
 *
 * @author  Meno Hochschild
 */
class WeekExtension
    implements ChronoExtension {

    //~ Methoden ------------------------------------------------------

    @Override
    public boolean accept(Class chronoType) {

        return false; // never called

    }

    @Override
    public Set> getElements(
        Locale locale,
        AttributeQuery attributes
    ) {

        if (locale.getCountry().isEmpty()) {
            return Collections.emptySet();
        }

        return Weekmodel.of(locale).getElements();

    }

    @Override
    public > T resolve(
        T entity,
        Locale locale,
        AttributeQuery attributes
    ) {

        return entity; // no-op

    }

}