jaitools.imageutils.ImageLayout2 Maven / Gradle / Ivy

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Provides a single jar containing all JAI-tools modules which you can use instead of including individual modules in your project. Note: It does not include the Jiffle scripting language or Jiffle image operator.

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package jaitools.imageutils;

/*
 * Copyright 2010 Simone Giannecchini
 * 
 * This file is part of jai-tools.

 * jai-tools 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 3 of the 
 * License, or (at your option) any later version.

 * jai-tools 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 jai-tools.  If not, see .
 */

import javax.media.jai.ImageLayout;
/**
 * Working around a bug in ImageLayout that blows up when doing hashing with NOT all the fields initialized.
 * 
 * @author Simone Giannecchini, GeoSolutions S.A.S.
 *
 */
public class ImageLayout2 extends ImageLayout{

	/**
	 * 
	 */
	private static final long serialVersionUID = -7921590012423277029L;

	@Override
	public int hashCode() {
		int code = 0, i = 1;
		
        // This implementation is quite arbitrary.
        // hashCode's NEED not be uniqe for two "different" objects
		if(isValid(ImageLayout2.WIDTH_MASK))
			code += (getWidth(null) * i++);
		
		if(isValid(ImageLayout2.HEIGHT_MASK))
			code += (getHeight(null) * i++);
        
		if(isValid(ImageLayout2.MIN_X_MASK))
			code += (getMinX(null) * i++);
        
		if(isValid(ImageLayout2.MIN_Y_MASK))
			code += (getMinY(null) * i++);
        
		if(isValid(ImageLayout2.TILE_HEIGHT_MASK))
			code += (getTileHeight(null) * i++);
        
		if(isValid(ImageLayout2.TILE_WIDTH_MASK))
			code += (getTileWidth(null) * i++);
        
		if(isValid(ImageLayout2.TILE_GRID_X_OFFSET_MASK))
			code += (getTileGridXOffset(null) * i++);
        
		if(isValid(ImageLayout2.TILE_GRID_Y_OFFSET_MASK))
			code += (getTileGridYOffset(null) * i++);

		if(isValid(ImageLayout2.SAMPLE_MODEL_MASK))
			code ^= getSampleModel(null).hashCode();
        
        code ^= validMask;
        
        if(isValid(ImageLayout2.COLOR_MODEL_MASK))
			code ^= getColorModel(null).hashCode();

        return code;
	}
	
}