/*
 * Page.java
 *
 * Created on den 9 oktober 2002, 13:25
 */

import java.util.*;

/**
 *
 * @author  h&m
 */
public class Page {
    private double PR;
    private int outgoing;
    private Collection ingoing = new Vector();
    private String name;
    private static double d = 0.15;
    
    /** Creates a new instance of Page */
    public Page(String name, int outgoing, double initialPR) {
        this.outgoing = outgoing;
        PR = initialPR;
        this.name = name;
    }
    
    /** Creates a new instance of Page */
    public Page(String name, int outgoing) {
        this(name, outgoing, 1);
    }
    
    /** Creates a new instance of Page */
    public Page(String name) {
        this(name, 0, 1);
    }
    
    public void incOutgoing() {
        outgoing++;
    }
    
    public String toString() {
        return name + ": " + PR;
    }
    
    public double getPR() {
        return PR;
    }
    
    public void addIngoing(Page p) {
        ingoing.add(p);
    }
    
    private double getVote() {
        return PR / outgoing;
    }
    
    public static void setD(double d) {
        Page.d = d;
    }
    
    boolean calculatePR() {
        double tmp = d;
        double trans = 0;
        Iterator iter = ingoing.iterator();
        while(iter.hasNext()) {
            Page p = (Page) iter.next();
            trans += p.getVote(); 
        }
        tmp += (1- d) * trans;
        boolean retv = true;
        if(tmp != PR)
            retv = false;
        PR = tmp;
        return retv;
    }
}