/* XXL: The eXtensible and fleXible Library for data processing
Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger
Head of the Database Research Group
Department of Mathematics and Computer Science
University of Marburg
Germany
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 3 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, see <http://www.gnu.org/licenses/>.
http://code.google.com/p/xxl/
*/
package xxl.core.indexStructures;
import xxl.core.spatial.rectangles.Rectangle;
/**
* This class contains <tt>static</tt> methods for descriptors.
*
* @see Descriptor
*/
public abstract class Descriptors {
/**
* Returns the union of the given descriptors (as a new Object).
*
* @param d1
* first descriptor
* @param d2
* second descriptor
* @return the union of <tt>d1</tt> and <tt>d2</tt>
*/
public static Descriptor union(Descriptor d1, Descriptor d2) {
Descriptor d = (Descriptor) d1.clone();
d.union(d2);
return d;
}
/**
* Returns the union of the given rectangles (as a new Object).
*
* @param r1
* first rectangle
* @param r2
* second rectangle
* @return the union of <tt>r1</tt> and <tt>r2</tt>
*
* @see xxl.core.spatial.rectangles.Rectangle
*/
public static Rectangle union(Rectangle r1, Rectangle r2) {
Rectangle r = (Rectangle) ((Descriptor) r1).clone();
r.union(r2);
return r;
}
}