/***************************************************************************
* Copyright (C) 2008 by Elvis Ciotti *
* Copyright (C) 2009 by Fabrizio Montesi *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* This program 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 Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* For details about the authors of this software, see the AUTHORS file. *
***************************************************************************/
package jolie.util;
import java.io.Serializable;
import jolie.lang.Constants;
/**
* A <code>Range</code> instance represents a range between two natural numbers.
* @author Fabrizio Montesi
*/
public class Range implements Serializable
{
private static final long serialVersionUID = Constants.serialVersionUID();
private static final int HASH_INIT_VALUE = 7;
private static final int HASH_FACTOR = 47;
private final int min;
private final int max;
/**
* Constructor
* @param min
* @param max
* @throws IllegalArgumentException if min or max are less than zero
*/
public Range( int min, int max )
{
if ( min < 0 || max < 0 ) {
throw new IllegalArgumentException();
}
this.min = min;
this.max = max;
}
public final int min()
{
return min;
}
public final int max()
{
return max;
}
@Override
public int hashCode()
{
int hash = HASH_INIT_VALUE;
hash = HASH_FACTOR * hash + this.min;
hash = HASH_FACTOR * hash + this.max;
return hash;
}
@Override
public boolean equals( Object other )
{
if ( this == other ) {
return true;
}
if ( other instanceof Range ) {
Range otherRange = (Range)other;
return min == otherRange.min && max == otherRange.max;
}
return false;
}
}