/*
 * 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.separators;

import xxl.core.functions.AbstractFunction;
import xxl.core.functions.Function;
import xxl.core.indexStructures.Separator;

/**
 * The class {@link xxl.core.indexStructures.Separator Separator} describes the known separtors of
 * the B+ tree. A <tt>Separator</tt> is a simple key (for example an Integer). The
 * <tt>Separator</tt> of a query is a closed interval [min, max]. .<br/>
 * <br/>
 * 
 * This class extends <tt>Separator</tt> for using <b>Doubles</b>.<br/>
 * <br/>
 * 
 * @author Marcus Pinnecke (pinnecke@mathematik.uni-marburg.de)
 * 
 * @see xxl.core.indexStructures.Separator
 */
public class DoubleSeparator extends Separator {

  /**
   * Used for a functional like programming style which forces a hard copy in this case.
   */
  public static Function<Object, DoubleSeparator> FACTORY_FUNCTION =
      new AbstractFunction<Object, DoubleSeparator>() {

        @Override
        public DoubleSeparator invoke(Object argument) {
          return new DoubleSeparator((Double) argument);
        }
      };

  /**
   * @see xxl.core.indexStructures.Separator#Separator(Comparable)
   */
  public DoubleSeparator(double sepValue) {
    super(sepValue);
  }

  /**
   * @see xxl.core.indexStructures.Separator#Separator(Comparable)
   */
  public DoubleSeparator(Double sepValue) {
    super(sepValue);
  }

  @Override
  public Object clone() {
    return new DoubleSeparator(new Double((Double) this.sepValue));
  }

}