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/*
 *  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 java.util.Date;

import org.joda.time.Chronology;

/**
 * DateConverter converts a java util Date to an instant or partial.
 * The Date is converted to milliseconds in the ISO chronology.
 *
 * @author Stephen Colebourne
 * @since 1.0
 */
final class DateConverter extends AbstractConverter
        implements InstantConverter, PartialConverter {

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

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

    //-----------------------------------------------------------------------
    /**
     * Gets the millis, which is the Date millis value.
     * 
     * @param object  the Date to convert, must not be null
     * @param chrono  the non-null result of getChronology
     * @return the millisecond value
     * @throws NullPointerException if the object is null
     * @throws ClassCastException if the object is an invalid type
     */
    public long getInstantMillis(Object object, Chronology chrono) {
        Date date = (Date) object;
        return date.getTime();
    }

    //-----------------------------------------------------------------------
    /**
     * Returns Date.class.
     * 
     * @return Date.class
     */
    public Class getSupportedType() {
        return Date.class;
    }

}