code: /*******************************************************************************
   * Copyright (c) 2015 Attila Kovacs <attila[AT]sigmyne.com>.
   * All rights reserved. 
   * 
   * This file is part of crush.
   * 
   *     crush is free software: you can redistribute it and/or modify
   *     it under the terms of the GNU General Public License as published by
   *     the Free Software Foundation, either version 3 of the License, or
   *     (at your option) any later version.
   * 
   *     crush 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 General Public License for more details.
   * 
   *     You should have received a copy of the GNU General Public License
   *     along with crush.  If not, see <http://www.gnu.org/licenses/>.
   * 
   * Contributors:
   *     Attila Kovacs <attila[AT]sigmyne.com> - initial API and implementation
   ******************************************************************************/
  
  package crush.telescope.sofia;
  
  import java.text.NumberFormat;
  
  import jnum.Copiable;
  import jnum.Unit;
  
  public class BracketedValues implements Cloneable, Copiable<BracketedValues> {
  	public double start = Double.NaN, end = Double.NaN;
  
  	public BracketedValues() {
  	    this(Double.NaN, Double.NaN);
  	}
  	
  	public BracketedValues(double start, double end) {
  	    this.start = start;
  	    this.end = end;
  	}
  	
  	@Override
  	public BracketedValues clone() {
  		try { return (BracketedValues) super.clone(); }
  		catch(CloneNotSupportedException e) { return null; }
  	}
  	
  	@Override
  	public BracketedValues copy() {
  		return clone();
  	}
  	
  	public void merge(BracketedValues bounds) {
  		if(bounds.start < start) start = bounds.start;
  		if(bounds.end > end) end = bounds.end;
  	}
  
  	public double midPoint() {
  		if(Double.isNaN(end)) return start;
  		else if(Double.isNaN(start)) return end;
  		return 0.5 * (start + end);
  	}
  	
  	@Override
      public String toString() {
  	    return toString(null, null);
  	}
  
  	public String toString(NumberFormat nf, Unit u) {
  	    double uValue = u == null ? 1.0 : u.value();
  	    String uName = u == null ? "" : " " + u.name();
  	    
  	    if(nf != null) return nf.format(start / uValue) + uName + " --> " + nf.format(end / uValue) + uName;
  	    return start + uName + " --> " + end + uName;
  	}
  
  	
  }
  