/*
 * Joda Software License, Version 1.0
 *
 *
 * Copyright (c) 2001-2004 Stephen Colebourne.  
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Joda project (http://www.joda.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The name "Joda" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact licence@joda.org.
 *
 * 5. Products derived from this software may not be called "Joda",
 *    nor may "Joda" appear in their name, without prior written
 *    permission of the Joda project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE JODA AUTHORS OR THE PROJECT
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Joda project and was originally 
 * created by Stephen Colebourne <scolebourne@joda.org>. For more
 * information on the Joda project, please see <http://www.joda.org/>.
 */
package org.joda.time.chrono;

import org.joda.time.Chronology;
import org.joda.time.DateTimeField;
import org.joda.time.DateTimeZone;
import org.joda.time.field.LenientDateTimeField;

/**
 * Wraps another Chronology, ensuring all the fields are lenient.
 * <p>
 * LenientChronology is thread-safe and immutable.
 *
 * @author Brian S O'Neill
 * @since 1.0
 * @see LenientDateTimeField
 * @see StrictChronology
 */
public final class LenientChronology extends AssembledChronology {

    /** Serialization lock */
    private static final long serialVersionUID = -3148237568046877177L;

    /**
     * Create a LenientChronology for any chronology.
     *
     * @param base the chronology to wrap
     * @throws IllegalArgumentException if chronology is null
     */
    public static LenientChronology getInstance(Chronology base) {
        if (base == null) {
            throw new IllegalArgumentException("Must supply a chronology");
        }
        return new LenientChronology(base);
    }

    private transient Chronology iWithUTC;

    /**
     * Create a LenientChronology for any chronology.
     *
     * @param base the chronology to wrap
     */
    private LenientChronology(Chronology base) {
        super(base, null);
    }

    public Chronology withUTC() {
        if (iWithUTC == null) {
            if (getZone() == DateTimeZone.UTC) {
                iWithUTC = this;
            } else {
                iWithUTC = LenientChronology.getInstance(getBase().withUTC());
            }
        }
        return iWithUTC;
    }

    public Chronology withZone(DateTimeZone zone) {
        if (zone == null) {
            zone = DateTimeZone.getDefault();
        }
        if (zone == DateTimeZone.UTC) {
            return withUTC();
        }
        if (zone == getZone()) {
            return this;
        }
        return LenientChronology.getInstance(getBase().withZone(zone));
    }

    protected void assemble(Fields fields) {
        fields.year = convertField(fields.year);
        fields.yearOfEra = convertField(fields.yearOfEra);
        fields.yearOfCentury = convertField(fields.yearOfCentury);
        fields.centuryOfEra = convertField(fields.centuryOfEra);
        fields.era = convertField(fields.era);
        fields.dayOfWeek = convertField(fields.dayOfWeek);
        fields.dayOfMonth = convertField(fields.dayOfMonth);
        fields.dayOfYear = convertField(fields.dayOfYear);
        fields.monthOfYear = convertField(fields.monthOfYear);
        fields.weekOfWeekyear = convertField(fields.weekOfWeekyear);
        fields.weekyear = convertField(fields.weekyear);
        fields.weekyearOfCentury = convertField(fields.weekyearOfCentury);

        fields.millisOfSecond = convertField(fields.millisOfSecond);
        fields.millisOfDay = convertField(fields.millisOfDay);
        fields.secondOfMinute = convertField(fields.secondOfMinute);
        fields.secondOfDay = convertField(fields.secondOfDay);
        fields.minuteOfHour = convertField(fields.minuteOfHour);
        fields.minuteOfDay = convertField(fields.minuteOfDay);
        fields.hourOfDay = convertField(fields.hourOfDay);
        fields.hourOfHalfday = convertField(fields.hourOfHalfday);
        fields.clockhourOfDay = convertField(fields.clockhourOfDay);
        fields.clockhourOfHalfday = convertField(fields.clockhourOfHalfday);
        fields.halfdayOfDay = convertField(fields.halfdayOfDay);
    }

    private static final DateTimeField convertField(DateTimeField field) {
        return LenientDateTimeField.getInstance(field);
    }

    public String toString() {
        return "LenientChronology[" + getBase().toString() + ']';
    }

}