networklist.java

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/**    
  * Copyright (C) 2006, Laboratorio di Valutazione delle Prestazioni - Politecnico di Milano

  * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
  
package jmt.engine.QueueNet;

import java.util.LinkedList;
import java.util.ListIterator;

/** This class implements a network list. Note that only classes of QueueNet
 * package can add or remove objects to/from the list.
 * @author Francesco Radaelli
 */
public class NetworkList {

	private LinkedList Networks;

	/** Creates a new instance of NetworkList object
	 */
	NetworkList() {
		Networks = new LinkedList();
	}

	/** Adds a new network to the list.
	 * @param Network Reference to the NetWork to be added.
	 */
	void add(QueueNetwork Network) {
		Networks.add(Network);
	}

	/** Removes a network from the list.
	 * @param Network Reference to the Network to be removed.
	 */
	void remove(QueueNetwork Network) {
		Networks.remove(Network);
	}

	/** Gets first network in the list.
	 * @return First network in the list.
	 */
	public QueueNetwork getFirst() {
		return (QueueNetwork) Networks.getFirst();
	}

	/** Gets last network in the list.
	 * @return Last network in the list.
	 */
	public QueueNetwork getLast() {
		return (QueueNetwork) Networks.getLast();
	}

	/** Gets i-th network in the list.
	 * @return Index-th network in the list.
	 */
	public QueueNetwork get(int Index) {
		return (QueueNetwork) Networks.get(Index);
	}


	/** Gets the network in the list, if it exists, which has the specified Name.
	 * @return The network called "Name". Returns Null if it doesn't exist.
	 */
	public QueueNetwork get(String Name) {
		ListIterator iterator = Networks.listIterator();
		QueueNetwork jc;
		while (iterator.hasNext()) {
			jc = (QueueNetwork) iterator.next();
			if (jc.getName().compareTo(Name) == 0)
				return jc;
		}
		return null;
	}

	/** Gets list size.
	 * @return Number of networks in the list.
	 */
	public int size() {
		return Networks.size();
	}

    /**
     * Gets a list iterator
     *
     */
	public ListIterator listIterator() {
		return Networks.listIterator();
	}


    /**Returns the index in this list of the first
     * occurrence of the specified element, or -1
     * if the List does not contain this element.
     */

	int indexOf(QueueNetwork Network) {
		return Networks.indexOf(Network);
	}
}