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Java example source code file (BasicWeekOfWeekyearDateTimeField.java)

This example Java source code file (BasicWeekOfWeekyearDateTimeField.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

basicchronology, basicweekofweekyeardatetimefield, durationfield, object, precisedurationdatetimefield, suppresswarnings

The BasicWeekOfWeekyearDateTimeField.java Java example source code

/*
 *  Copyright 2001-2013 Stephen Colebourne
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.joda.time.chrono;

import org.joda.time.DateTimeConstants;
import org.joda.time.DateTimeFieldType;
import org.joda.time.DurationField;
import org.joda.time.ReadablePartial;
import org.joda.time.field.PreciseDurationDateTimeField;

/**
 * Provides time calculations for the week of a week based year component of time.
 *
 * @author Guy Allard
 * @author Stephen Colebourne
 * @author Brian S O'Neill
 * @since 1.1, refactored from GJWeekOfWeekyearDateTimeField
 */
final class BasicWeekOfWeekyearDateTimeField extends PreciseDurationDateTimeField {

    @SuppressWarnings("unused")
    private static final long serialVersionUID = -1587436826395135328L;

    private final BasicChronology iChronology;

    /**
     * Restricted constructor
     */
    BasicWeekOfWeekyearDateTimeField(BasicChronology chronology, DurationField weeks) {
        super(DateTimeFieldType.weekOfWeekyear(), weeks);
        iChronology = chronology;
    }

    /**
     * Get the week of a week based year component of the specified time instant.
     * 
     * @see org.joda.time.DateTimeField#get(long)
     * @param instant  the time instant in millis to query.
     * @return the week of the year extracted from the input.
     */
    public int get(long instant) {
        return iChronology.getWeekOfWeekyear(instant);
    }

    public DurationField getRangeDurationField() {
        return iChronology.weekyears();
    }

    // 1970-01-01 is day of week 4, Thursday. The rounding methods need to
    // apply a corrective alignment since weeks begin on day of week 1, Monday.

    public long roundFloor(long instant) {
        return super.roundFloor(instant + 3 * DateTimeConstants.MILLIS_PER_DAY)
            - 3 * DateTimeConstants.MILLIS_PER_DAY;
    }

    public long roundCeiling(long instant) {
        return super.roundCeiling(instant + 3 * DateTimeConstants.MILLIS_PER_DAY)
            - 3 * DateTimeConstants.MILLIS_PER_DAY;
    }

    public long remainder(long instant) {
        return super.remainder(instant + 3 * DateTimeConstants.MILLIS_PER_DAY);
    }

    public int getMinimumValue() {
        return 1;
    }

    public int getMaximumValue() {
        return 53;
    }

    public int getMaximumValue(long instant) {
        int weekyear = iChronology.getWeekyear(instant);
        return iChronology.getWeeksInYear(weekyear);
    }

    public int getMaximumValue(ReadablePartial partial) {
        if (partial.isSupported(DateTimeFieldType.weekyear())) {
            int weekyear = partial.get(DateTimeFieldType.weekyear());
            return iChronology.getWeeksInYear(weekyear);
        }
        return 53;
    }

    public int getMaximumValue(ReadablePartial partial, int[] values) {
        int size = partial.size();
        for (int i = 0; i < size; i++) {
            if (partial.getFieldType(i) == DateTimeFieldType.weekyear()) {
                int weekyear = values[i];
                return iChronology.getWeeksInYear(weekyear);
            }
        }
        return 53;
    }

    protected int getMaximumValueForSet(long instant, int value) {
        return value > 52 ? getMaximumValue(instant) : 52;
    }

    /**
     * Serialization singleton
     */
    private Object readResolve() {
        return iChronology.weekOfWeekyear();
    }
}

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