code: //==============================================================================
  //	
  //	Copyright (c) 2013-
  //	Authors:
  //	* Ernst Moritz Hahn <emhahn@cs.ox.ac.uk> (University of Oxford)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM 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 2 of the License, or
  //	(at your option) any later version.
  //	
  //	PRISM 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 PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package param;
  
  /**
   * Represents a given evaluation of parameters.
   * Objects of this class are immutable. Once it is created, no further changes
   * are possible. Objects of this class are mainly intended to be used with
   * {@code Region} objects, which represent sets of points, and check
   * 
   * @author Ernst Moritz Hahn <emhahn@cs.ox.ac.uk> (University of Oxford)
   * @see Region
   */
  public final class Point
  {
  	/** coordinates of point */
  	private BigRational[] dimensions;
  
  	/**
  	 * Constructs a new point.
  	 * 
  	 * @param dimensions coordinates of this point
  	 */
  	public Point(BigRational[] dimensions)
  	{
  		this.dimensions = new BigRational[dimensions.length];
  		System.arraycopy(dimensions, 0, this.dimensions, 0, dimensions.length);
  	}
  
  	/**
  	 * Returns value of a given coordinate
  	 * @param dim coordinate to return value of
  	 * @return value of given coordinate
  	 */
  	public BigRational getDimension(int dim)
  	{
  		return dimensions[dim];
  	}
  
  	@Override
  	public String toString()
  	{
  		StringBuilder builder = new StringBuilder();
  
  		builder.append("(");
  		for (int dim = 0; dim < dimensions.length; dim++) {
  			builder.append(dimensions[dim].doubleValue());
  			if (dim != dimensions.length - 1) {
  				builder.append(",");
  			}
  		}
  		builder.append(")");
  
  		return builder.toString();
  	}
  
  	/**
  	 * Returns array representation of point.
  	 * 
  	 * @return array representation of point
  	 */
  	public BigRational[] toArray()
  	{
  		BigRational[] result = new BigRational[dimensions.length];
  		System.arraycopy(this.dimensions, 0, result, 0, this.dimensions.length);
  		return result;
  	}
  
  	/**
  	 * Returns number of dimensions of point.
  	 * 
  	 * @return number of dimensions of point
  	 */
  	public int size()
  	{
  		return dimensions.length;
  	}
  
  	@Override
  	public boolean equals(Object obj)
  	{
  		if (!(obj instanceof Point)) {
  			return false;
  		}
  
  		Point other = (Point) obj;
  		if (this.dimensions.length != other.dimensions.length) {
  			return false;
  		}
  		for (int dim = 0; dim < dimensions.length; dim++) {
  			if (!this.dimensions[dim].equals(other.dimensions[dim])) {
  				return false;
  			}
  		}
  		return true;
  	}
  
  	@Override
  	public int hashCode()
  	{
  		int hash = 0;
  
  		for (int i = 0; i < dimensions.length; i++) {
  			hash = dimensions[i].hashCode() + (hash << 6) + (hash << 16) - hash;
  		}
  
  		return hash;
  	}
  
  	/**
  	 * Returns array of doubles approximating this point.
  	 * 
  	 * @return array of doubles approximating this point
  	 */
  	double[] doubleValues()
  	{
  		double[] result = new double[dimensions.length];
  		for (int dim = 0; dim < dimensions.length; dim++) {
  			result[dim] = dimensions[dim].doubleValue();
  		}
  		return result;
  	}
  }
  