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Groovy: A powerful, dynamic language for the JVM
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/*
 * 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;

public abstract class BaseDuration {
    protected final int years;
    protected final int months;    
    protected final int days;
    protected final int hours;
    protected final int minutes;
    protected final int seconds;    
    protected final int millis;

    protected BaseDuration(final int years, final int months, final int days, final int hours, final int minutes, final int seconds, final int millis) {
        this.years = years;
        this.months = months;
        this.days = days;
        this.hours = hours;
        this.minutes = minutes;
        this.seconds = seconds;
        this.millis = millis;
    }

    protected BaseDuration(final int days, final int hours, final int minutes, final int seconds, final int millis) {
        this(0, 0, days, hours, minutes, seconds, millis);
    }
    
    public int getYears() {
        return this.years;
    }
    
    public int getMonths() {
        return this.months;
    }
    
    public int getDays() {
        return this.days;
    }
    
    public int getHours() {
        return this.hours;
    }
    
    public int getMinutes() {
        return this.minutes;
    }
    
    public int getSeconds() {
        return this.seconds;
    }
    
    public int getMillis() {
        return this.millis;
    }
    
    public Date plus(final Date date) {
    final Calendar cal = Calendar.getInstance();
    
        cal.setTime(date);
        cal.add(Calendar.YEAR, this.years);
        cal.add(Calendar.MONTH, this.months);
        cal.add(Calendar.DAY_OF_YEAR, this.days);
        cal.add(Calendar.HOUR_OF_DAY, this.hours);
        cal.add(Calendar.MINUTE, this.minutes);
        cal.add(Calendar.SECOND, this.seconds);
        cal.add(Calendar.MILLISECOND, this.millis);
        
        return cal.getTime();
    }
    
    public abstract long toMilliseconds();
    
    public abstract Date getAgo();
    
    public abstract From getFrom();

    public abstract static class From {
        public abstract Date getNow();
        
        public Date getToday() {
            return getNow();
        }
    }
}