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Java example source code file (ReadableDurationConverter.java)

This example Java source code file (ReadableDurationConverter.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

abstractconverter, chronology, class, instance, object, periodconverter, readableduration, readabledurationconverter

The ReadableDurationConverter.java Java example source code

/*
 *  Copyright 2001-2009 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.convert;

import org.joda.time.Chronology;
import org.joda.time.DateTimeUtils;
import org.joda.time.ReadWritablePeriod;
import org.joda.time.ReadableDuration;

/**
 * ReadableDurationConverter extracts milliseconds and chronology from a ReadableDuration.
 *
 * @author Stephen Colebourne
 * @author Brian S O'Neill
 * @since 1.0
 */
class ReadableDurationConverter extends AbstractConverter
        implements DurationConverter, PeriodConverter {

    /**
     * Singleton instance.
     */
    static final ReadableDurationConverter INSTANCE = new ReadableDurationConverter();

    /**
     * Restricted constructor.
     */
    protected ReadableDurationConverter() {
        super();
    }

    //-----------------------------------------------------------------------
    /**
     * Extracts the millis from an object of this converter's type.
     * 
     * @param object  the object to convert, must not be null
     * @return the millisecond value
     * @throws NullPointerException if the object is null
     * @throws ClassCastException if the object is an invalid type
     * @throws IllegalArgumentException if the object is invalid
     */
    public long getDurationMillis(Object object) {
        return ((ReadableDuration) object).getMillis();
    }

    //-----------------------------------------------------------------------
    /**
     * Extracts duration values from an object of this converter's type, and
     * sets them into the given ReadWritableDuration.
     *
     * @param writablePeriod  period to get modified
     * @param object  the object to convert, must not be null
     * @param chrono  the chronology to use, must not be null
     * @throws NullPointerException if the duration or object is null
     * @throws ClassCastException if the object is an invalid type
     * @throws IllegalArgumentException if the object is invalid
     */
    public void setInto(ReadWritablePeriod writablePeriod, Object object, Chronology chrono) {
        ReadableDuration dur = (ReadableDuration) object;
        chrono = DateTimeUtils.getChronology(chrono);
        long duration = dur.getMillis();
        int[] values = chrono.get(writablePeriod, duration);
        for (int i = 0; i < values.length; i++) {
            writablePeriod.setValue(i, values[i]);
        }
    }

    //-----------------------------------------------------------------------
    /**
     * Returns ReadableDuration.class.
     * 
     * @return ReadableDuration.class
     */
    public Class<?> getSupportedType() {
        return ReadableDuration.class;
    }

}

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