Groovy example source code file (DatumDependentDuration.java)

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

Java - Groovy tags/keywords

baseduration, calendar, calendar, date, date, datumdependentduration, datumdependentduration, duration, duration, from, timedatumdependentduration, timeduration, util

The Groovy DatumDependentDuration.java source code

/*
 * Copyright 2003-2007 the original author or authors.
 *
 * 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 groovy.time;

import java.util.Calendar;
import java.util.Date;

/**
 * DatumDependentDuration represents durations whose length in milliseconds 
 * cannot be determined without knowing the datum point.
 * <p/>
 * I don't know how many days in a year unless I know if it's a leap year or not.
 * <p/>
 * I don't know how many days in a month unless I know the name of the month 
 * (and if it's a leap year if the month is February)
 *
 * @author John Wilson tug@wilson.co.uk
 */
public class DatumDependentDuration extends BaseDuration {
    public DatumDependentDuration(final int years, final int months, final int days, final int hours, final int minutes, final int seconds, final int millis) {
        super(years, months, days, hours, minutes, seconds, millis);
    }

    public int getMonths() {
        return this.months;
    }

    public int getYears() {
        return this.years;
    }

    public DatumDependentDuration plus(final DatumDependentDuration rhs) {
        return new DatumDependentDuration(this.getYears() + rhs.getYears(), this.getMonths() + rhs.getMonths(),
                this.getDays() + rhs.getDays(), this.getHours() + rhs.getHours(),
                this.getMinutes() + rhs.getMinutes(), this.getSeconds() + rhs.getSeconds(),
                this.getMillis() + rhs.getMillis());
    }

    public DatumDependentDuration plus(final TimeDatumDependentDuration rhs) {
        return rhs.plus(this);
    }

    public DatumDependentDuration plus(final Duration rhs) {
        return new DatumDependentDuration(this.getYears(), this.getMonths(),
                this.getDays() + rhs.getDays(), this.getHours() + rhs.getHours(),
                this.getMinutes() + rhs.getMinutes(), this.getSeconds() + rhs.getSeconds(),
                this.getMillis() + rhs.getMillis());

    }

    public DatumDependentDuration plus(final TimeDuration rhs) {
        return rhs.plus(this);

    }

    public DatumDependentDuration minus(final DatumDependentDuration rhs) {
        return new DatumDependentDuration(this.getYears() - rhs.getYears(), this.getMonths() - rhs.getMonths(),
                this.getDays() - rhs.getDays(), this.getHours() - rhs.getHours(),
                this.getMinutes() - rhs.getMinutes(), this.getSeconds() - rhs.getSeconds(),
                this.getMillis() - rhs.getMillis());

    }

    public DatumDependentDuration minus(final Duration rhs) {
        return new DatumDependentDuration(this.getYears(), this.getMonths(),
                this.getDays() - rhs.getDays(), this.getHours() - rhs.getHours(),
                this.getMinutes() - rhs.getMinutes(), this.getSeconds() - rhs.getSeconds(),
                this.getMillis() - rhs.getMillis());

    }

    /**
     * @see groovy.time.BaseDuration#toMilliseconds()
     *
     * Change the duration into milliseconds, relative to 'now.'  Therefore
     * things like timezone and time of year will affect how this conversion 
     * occurs.
     */
    public long toMilliseconds() {
        final Date now = new Date();
        return TimeCategory.minus(plus(now), now).toMilliseconds();
    }

    public Date getAgo() {
        final Calendar cal = Calendar.getInstance();

        cal.add(Calendar.YEAR, -this.getYears());
        cal.add(Calendar.MONTH, -this.getMonths());
        cal.add(Calendar.DAY_OF_YEAR, -this.getDays());
        cal.add(Calendar.HOUR_OF_DAY, -this.getHours());
        cal.add(Calendar.MINUTE, -this.getMinutes());
        cal.add(Calendar.SECOND, -this.getSeconds());
        cal.add(Calendar.MILLISECOND, -this.getMillis());

        //
        // SqlDate should not really care about these values but it seems to "remember" them
        // so we clear them. We do the adds first in case we get carry into the day field.
        //
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);

        return new java.sql.Date(cal.getTimeInMillis());
    }

    public From getFrom() {
        return new From() {
            public Date getNow() {
                final Calendar cal = Calendar.getInstance();

                cal.add(Calendar.YEAR, DatumDependentDuration.this.getYears());
                cal.add(Calendar.MONTH, DatumDependentDuration.this.getMonths());
                cal.add(Calendar.DAY_OF_YEAR, DatumDependentDuration.this.getDays());
                cal.add(Calendar.HOUR_OF_DAY, DatumDependentDuration.this.getHours());
                cal.add(Calendar.MINUTE, DatumDependentDuration.this.getMinutes());
                cal.add(Calendar.SECOND, DatumDependentDuration.this.getSeconds());
                cal.add(Calendar.MILLISECOND, DatumDependentDuration.this.getMillis());

                //
                // SqlDate should not really care about these values but it seems to "remember" them
                // so we clear them. We do the adds first in case we get carry into the day field.
                //
                cal.set(Calendar.HOUR_OF_DAY, 0);
                cal.set(Calendar.MINUTE, 0);
                cal.set(Calendar.SECOND, 0);
                cal.set(Calendar.MILLISECOND, 0);

                return new java.sql.Date(cal.getTimeInMillis());
            }
        };
    }
}