/************************************************************************************
 * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University
 * All rights reserved.
 * Refer to LICENSE for terms and conditions of use.
 ***********************************************************************************/
package vnsim.vehicular.generator;

import java.util.*;

public class EntryFlowVariation {

	//sorted by time
	
	ArrayList<Integer> times; //simulation time
	ArrayList<Integer> flow;
	
	public EntryFlowVariation(){
		times=new ArrayList<Integer> ();
		flow=new ArrayList<Integer> ();
	}

	public int getFirstValue() {
		if(flow.size()<0)
			return -1;
		return flow.get(0);
	}
	
	public void removeFirst() {
		times.remove(0);
		flow.remove(0);
	}
	
	public int getFirstMom() {
		if(times.size()==0)
			return -1;
		return times.get(0);
	}

	public void add(int mom, int val) {
		if(times.size()>0) {
			int last=times.get(times.size()-1);
			if(mom<last) {
				System.err.println("WARNING! Skipped adding time = "+mom+" NOT LAST!");
				return;
			}
		}
		times.add(mom);
		flow.add(val);
	}
}