/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2012, 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.client.map;

import java.awt.Point;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import org.geotoolkit.client.Request;
import org.geotoolkit.storage.coverage.DefaultTileReference;
import org.geotoolkit.image.io.XImageIO;

/**
 *
 * @author Guilhem Legal (Geomatys)
 */
public class RequestTileReference extends DefaultTileReference {

    public RequestTileReference(ImageReaderSpi spi, Request input, int imageIndex, Point position) {
        super(spi, input, imageIndex, position);
    }



    @Override
    public ImageReader getImageReader() throws IOException {


        if(spi == null){
            //try to find reader
            ImageReader reader = XImageIO.getReader(((Request)input).getResponseStream(), Boolean.TRUE, Boolean.TRUE);
            if (!reader.getClass().getName().startsWith("com.sun.media")) {
                return reader;
            }else{
                //reader is JAI, we don't want this implementation
                //we use an ImageInputStream, this will avoid JAI readers since
                //pure java reader should be first.
                XImageIO.dispose(reader);
                final ImageInputStream ninput = ImageIO.createImageInputStream(((Request)input).getResponseStream());
                reader = XImageIO.getReader(ninput, Boolean.TRUE, Boolean.TRUE);
                return reader;
            }
        }

        final Object inputTmp = ((Request)input).getResponseStream();
        Object in = XImageIO.toSupportedInput(spi, inputTmp);

        final ImageReader reader = spi.createReaderInstance();
        reader.setInput(in, true, true);
        return reader;
    }
}