/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2014, Geomatys
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotoolkit.util.converter;

import java.time.Instant;
import java.util.Date;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import org.apache.sis.util.ObjectConverter;
import org.apache.sis.util.UnconvertibleObjectException;
import org.geotoolkit.feature.util.converter.SimpleConverter;

/**
 *
 * @author Johann Sorel (Geomatys)
 */
public class LocalDateTimeToNumberConverter extends SimpleConverter<LocalDateTime, Double> {

    private final SimpleConverter<Double,LocalDateTime> inverse = new SimpleConverter<Double, LocalDateTime>() {

        @Override
        public Class<Double> getSourceClass() {
            return Double.class;
        }

        @Override
        public Class<LocalDateTime> getTargetClass() {
            return LocalDateTime.class;
        }

        @Override
        public LocalDateTime apply(Double object) throws UnconvertibleObjectException {
            final Instant instant = Instant.ofEpochMilli(object.longValue());
            return LocalDateTime.ofInstant(instant, ZoneOffset.UTC);
        }
            
    };
    
    @Override
    public Class<LocalDateTime> getSourceClass() {
        return LocalDateTime.class;
    }

    @Override
    public Class<Double> getTargetClass() {
        return Double.class;
    }

    @Override
    public Double apply(LocalDateTime object) throws UnconvertibleObjectException {
        final Date date = Date.from(object.toInstant(ZoneOffset.UTC));
        return (double) date.getTime();
    }

    @Override
    public ObjectConverter<Double, LocalDateTime> inverse() throws UnsupportedOperationException {
        return inverse;
    }
    
}