// disorderHeap.java 
// -----------------------
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
// last major change: 17.05.2004
//
// This program 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.
//
// 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 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
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
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package de.anomic.tools;

import java.util.*;

public class disorderHeap {

    LinkedList list;

    public disorderHeap() {
	list = new LinkedList();
    }

    public disorderHeap(int numbers) {
	// create a disorder heap with numbers in it
	// the numbers are 0..numbers-1
	this();
	for (int i = 0; i < numbers; i++) add("" + i);
    }
    
    public synchronized void add(Object element) {
	// add one element into the list at an arbitrary position
	int pos = (int) ((System.currentTimeMillis() / 7) % ((long) (list.size() + 1)));
	list.add(pos, element);
    }

    public synchronized Object remove() {
	if (list.size() == 0) return null;
	int pos = (int) ((System.currentTimeMillis() / 13) % ((long) list.size()));
	return list.remove(pos);
    }

    public synchronized int number() {
	String n = (String) this.remove();
	if (n == null) return -1;
	try {
	    return Integer.parseInt(n);
	} catch (Exception e) {
	    return -1;
	}
    }

    public synchronized int size() {
	return list.size();
    }


    public static void main(String[] args) {
	disorderHeap ul = new disorderHeap();
	for (int i = 0; i < args.length; i++) ul.add(args[i]);
	for (int i = 0; i < args.length; i++) System.out.print((String) ul.remove() + " ");
	System.out.println();
    }

}