/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2009, 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.display2d.primitive.iso;

import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import org.opengis.geometry.Geometry;

/**
 * Simple abstract path iterator for ISO Geometry.
 * 
 * @author Johann Sorel (Geomatys)
 * @module
 */
public abstract class ISOGeometryIterator<T extends Geometry> implements PathIterator {

    private static final AffineTransform IDENTITY = new AffineTransform();

	protected double[] dcoords = new double[2];
    protected AffineTransform transform;
    protected final T geometry;

    protected ISOGeometryIterator(final T geometry, final AffineTransform trs){
        this.geometry = geometry;
        this.transform = (trs == null) ? IDENTITY : trs;
    }

	/**
     * {@inheritDoc }
     */
    @Override
	public int currentSegment(final float[] coords) {
		int result = currentSegment(dcoords);
		coords[0] = (float) dcoords[0];
		coords[1] = (float) dcoords[1];
		return result;
	}

    public void setTransform(final AffineTransform trs){
        this.transform = (trs == null) ? IDENTITY : trs;
    }

    public AffineTransform getTransform(){
        return transform;
    }

    public T getGeometry(){
        return geometry;
    }

}