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Java example source code file (ReadablePeriodConverter.java)

This example Java source code file (ReadablePeriodConverter.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, periodtype, readableperiod, readableperiodconverter

The ReadablePeriodConverter.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.PeriodType;
import org.joda.time.ReadWritablePeriod;
import org.joda.time.ReadablePeriod;

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

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

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

    //-----------------------------------------------------------------------
    /**
     * Extracts duration values from an object of this converter's type, and
     * sets them into the given ReadWritablePeriod.
     *
     * @param duration duration to get modified
     * @param object  the object to convert, must not be null
     * @param chrono  the chronology to use
     * @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 duration, Object object, Chronology chrono) {
        duration.setPeriod((ReadablePeriod) object);
    }

    /**
     * Selects a suitable period type for the given object.
     *
     * @param object  the object to examine, must not be null
     * @return the period type from the readable duration
     * @throws NullPointerException if the object is null
     * @throws ClassCastException if the object is an invalid type
     */
    public PeriodType getPeriodType(Object object) {
        ReadablePeriod period = (ReadablePeriod) object;
        return period.getPeriodType();
    }

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

}

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