/*******************************************************************************
 * Copyright (c) 2012 The University of Reading
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University of Reading, nor the names of the
 *    authors or contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/

package uk.ac.rdg.resc.edal.grid;

import java.util.List;

import uk.ac.rdg.resc.edal.domain.Extent;
import uk.ac.rdg.resc.edal.position.VerticalCrs;
import uk.ac.rdg.resc.edal.util.Extents;

public class VerticalAxisImpl extends ReferenceableAxisImpl implements VerticalAxis {

    private static final long serialVersionUID = 1L;
    private VerticalCrs vCrs;

    public VerticalAxisImpl(String axisName, List<Double> values, VerticalCrs vCrs) {
        super(axisName, values, false);
        this.vCrs = vCrs;
    }

    @Override
    public VerticalCrs getVerticalCrs() {
        return vCrs;
    }

    @Override
    public Extent<Double> getExtent() {
        if(reversed) {
            return Extents.newExtent(getLastValue(), getFirstValue());
        } else {
            return Extents.newExtent(getFirstValue(), getLastValue());
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = super.hashCode();
        result = prime * result + ((vCrs == null) ? 0 : vCrs.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (!super.equals(obj))
            return false;
        if (getClass() != obj.getClass())
            return false;
        VerticalAxisImpl other = (VerticalAxisImpl) obj;
        if (vCrs == null) {
            if (other.vCrs != null)
                return false;
        } else if (!vCrs.equals(other.vCrs))
            return false;
        return true;
    }
}
