71 lines
2.1 KiB
Java
71 lines
2.1 KiB
Java
//******************************************************************************
|
|
//
|
|
// File: KnapsackProblem.java
|
|
// Package: edu.rit.gpu.example
|
|
// Unit: Interface edu.rit.gpu.example.KnapsackProblem
|
|
//
|
|
// This Java source file is copyright (C) 2016 by Alan Kaminsky. All rights
|
|
// reserved. For further information, contact the author, Alan Kaminsky, at
|
|
// ark@cs.rit.edu.
|
|
//
|
|
// This Java source file is part of the Parallel Java 2 Library ("PJ2"). PJ2 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.
|
|
//
|
|
// PJ2 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.
|
|
//
|
|
// A copy of the GNU General Public License is provided in the file gpl.txt. You
|
|
// may also obtain a copy of the GNU General Public License on the World Wide
|
|
// Web at http://www.gnu.org/licenses/gpl.html.
|
|
//
|
|
//******************************************************************************
|
|
|
|
package edu.rit.gpu.example;
|
|
|
|
import edu.rit.util.Instance;
|
|
|
|
/**
|
|
* Interface KnapsackProblem is the interface for an object that defines a
|
|
* knapsack problem. The definition consists of the knapsack capacity, the
|
|
* number of items, and the weight and value of each item.
|
|
*
|
|
* @author Alan Kaminsky
|
|
* @version 15-Feb-2016
|
|
*/
|
|
public interface KnapsackProblem
|
|
{
|
|
|
|
// Exported operations.
|
|
|
|
/**
|
|
* Get the knapsack capacity.
|
|
*
|
|
* @return Capacity.
|
|
*/
|
|
public long capacity();
|
|
|
|
/**
|
|
* Get the number of items, <I>N.</I>
|
|
*
|
|
* @return Number of items.
|
|
*/
|
|
public int itemCount();
|
|
|
|
/**
|
|
* Get the weight and value of the next item. This method must be called
|
|
* <I>N</I> times to get all the items. Each method call returns a new
|
|
* {@linkplain WV} object.
|
|
*
|
|
* @return Weight/value.
|
|
*
|
|
* @exception NoSuchElementException
|
|
* (unchecked exception) Thrown if this method is called more than
|
|
* <I>N</I> times.
|
|
*/
|
|
public WV next();
|
|
|
|
}
|