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/*
 * -----------------------------------------------------------------------
 * Copyright © 2013-2014 Meno Hochschild, 
 * -----------------------------------------------------------------------
 * This file (LongElement.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.ChronoElement;
import net.time4j.engine.ChronoEntity;
import net.time4j.engine.ChronoFunction;
import net.time4j.engine.ChronoOperator;
import net.time4j.format.NumericalElement;

import java.io.InvalidObjectException;
import java.io.ObjectStreamException;
import java.math.BigDecimal;


/**
 * Repräsentiert ein Uhrzeitelement vom long-Typ. 
 *
 * @author      Meno Hochschild
 * @doctags.concurrency {immutable}
 */
final class LongElement
    extends AbstractTimeElement
    implements ProportionalElement,
               NumericalElement {

    //~ Statische Felder/Initialisierungen --------------------------------

    /**
     * Zeiger auf den Tagesüberlauf.
     */
    static final ChronoElement DAY_OVERFLOW = new LongElement();

    private static final long serialVersionUID = 5930990958663061693L;

    //~ Instanzvariablen --------------------------------------------------

    private transient final Long defaultMin;
    private transient final Long defaultMax;
    private transient final ChronoFunction, BigDecimal> rf;

    //~ Konstruktoren -----------------------------------------------------

    private LongElement() {
        this("DAY_OVERFLOW", Long.MIN_VALUE, Long.MAX_VALUE);
    }

    private LongElement(
        String name,
        long defaultMin,
        long defaultMax
    ) {
        super(name);

        this.defaultMin = Long.valueOf(defaultMin);
        this.defaultMax = Long.valueOf(defaultMax);

        this.rf = new ProportionalFunction(this, true);

    }

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

    @Override
    public Class getType() {

        return Long.class;

    }

    @Override
    public Long getDefaultMinimum() {

        return this.defaultMin;

    }

    @Override
    public Long getDefaultMaximum() {

        return this.defaultMax;

    }

    @Override
    public boolean isDateElement() {

        return false;

    }

    @Override
    public boolean isTimeElement() {

        return true;

    }

    @Override
    public int numerical(Long value) {

        long v = value.longValue();

        if (v >= Integer.MIN_VALUE && v <= Integer.MAX_VALUE) {
            return value.intValue();
        } else {
            throw new ArithmeticException("Numerical overflow: " + value);
        }

    }

    @Override
    public ChronoFunction, BigDecimal> ratio() {

        return this.rf;

    }


    @Override
    public ChronoOperator roundedUp(int stepwidth) {

        return new RoundingOperator(
            this,
            Boolean.TRUE,
            stepwidth
        );

    }

    @Override
    public ChronoOperator roundedHalf(int stepwidth) {

        return new RoundingOperator(
            this,
            null,
            stepwidth
        );

    }

    @Override
    public ChronoOperator roundedDown(int stepwidth) {

        return new RoundingOperator(
            this,
            Boolean.FALSE,
            stepwidth
        );

    }

    /**
     * Erzeugt ein neues Uhrzeitelement ohne Formatsymbol. 
     *
     * @param   name        name of element
     * @param   defaultMin  default minimum
     * @param   defaultMax  default maximum
     */
    static LongElement create(
        String name,
        long defaultMin,
        long defaultMax
    ) {

        return new LongElement(name, defaultMin, defaultMax);

    }

    private Object readResolve() throws ObjectStreamException {

        Object element = PlainTime.lookupElement(this.name());

        if (element == null) {
            if (this.name().equals("DAY_OVERFLOW")) {
                return DAY_OVERFLOW;
            } else {
                throw new InvalidObjectException(this.name());
            }
        } else {
            return element;
        }

    }

}