/*
 * Geotools 2 - OpenSource mapping toolkit
 * (C) 2003, Geotools Project Managment Committee (PMC)
 * (C) 2001, Institut de Recherche pour le Développement
 *
 *    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; either
 *    version 2.1 of the License, or (at your option) any later version.
 *
 *    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.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 *    This package contains documentation from OpenGIS specifications.
 *    OpenGIS consortium's work is fully acknowledged here.
 */
package org.geotools.ct;

// OpenGIS dependencies
import java.awt.geom.Point2D;
import java.rmi.RemoteException;

import org.geotools.pt.Matrix;
import org.opengis.ct.CT_MathTransform;
import org.opengis.pt.PT_CoordinatePoint;
import org.opengis.referencing.operation.TransformException;


/**
 * Wrap an {@link CT_MathTransform} into a {@link MathTransform2D}.
 *
 * @source $URL$
 * @version 1.0
 * @author Martin Desruisseaux
 *
 * @deprecated No replacement for RMI objects.
 */
final class MathTransformAdapter2D extends MathTransformAdapter implements MathTransform2D {
    /**
     * Serial number for interoperability with different versions.
     */
    private static final long serialVersionUID = 2870952997133267365L;
    
    /**
     * Construct an adapter.
     *
     * @throws RemoteException if a remote call failed.
     */
    public MathTransformAdapter2D(final CT_MathTransform transform) throws RemoteException {
        super(transform);
        if (getDimSource()!=2 || getDimTarget()!=2) {
            throw new IllegalArgumentException();
        }
    }
    
    /**
     * Transforms the specified <code>ptSrc</code> and stores the result in <code>ptDst</code>.
     */
    public Point2D transform(final Point2D ptSrc, final Point2D ptDst) throws TransformException {
        assert getDimSource()==2 && getDimTarget()==2;
        try {
            double[] array = transform.transformList(new double[] {ptSrc.getX(), ptSrc.getY()});
            if (ptDst!=null) {
                ptDst.setLocation(array[0], array[1]);
                return ptDst;
            } else {
                return new Point2D.Double(array[0], array[1]);
            }
        } catch (RemoteException exception) {
            final Throwable cause = exception.detail;
            if (cause instanceof TransformException) {
                throw (TransformException) cause;
            }
            throw new TransformException(exception.getLocalizedMessage(), exception);
        }
    }
    
    /**
     * Gets the derivative of this transform at a point.
     *
     * @param  point The coordinate point where to evaluate the derivative.
     * @return The derivative at the specified point (never <code>null</code>).
     * @throws TransformException if the derivative can't be evaluated at the specified point.
     */
    public Matrix derivative(final Point2D point) throws TransformException {
        try {
            final PT_CoordinatePoint ogPoint = (point!=null) ?
                    new PT_CoordinatePoint(point.getX(), point.getY()) : null;
            return new Matrix(transform.derivative(ogPoint).elt);
        } catch (RemoteException exception) {
            final Throwable cause = exception.detail;
            if (cause instanceof TransformException) {
                throw (TransformException) cause;
            }
            throw new TransformException(exception.getLocalizedMessage(), exception);
        }
    }
}