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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 org.joda.time.Chronology;

/**
 * LongConverter converts a Long to an instant, partial or duration.
 * The Long value represents milliseconds in the ISO chronology.
 *
 * @author Stephen Colebourne
 * @author Brian S O'Neill
 * @since 1.0
 */
class LongConverter extends AbstractConverter
        implements InstantConverter, PartialConverter, DurationConverter {

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

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

    //-----------------------------------------------------------------------
    /**
     * Gets the millisecond instant, which is the Long value.
     * 
     * @param object  the Long to convert, must not be null
     * @param chrono  the chronology to use, which is always non-null
     * @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) {
        return ((Long) object).longValue();
    }

    //-----------------------------------------------------------------------
    /**
     * Gets the millisecond duration, which is the Long value.
     * 
     * @param object  the Long to convert, must not be null
     * @return the millisecond duration
     * @throws NullPointerException if the object is null
     * @throws ClassCastException if the object is an invalid type
     */
    public long getDurationMillis(Object object) {
        return ((Long) object).longValue();
    }

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

}