/**
 * Cs132SimpleVertex - a concrete implementation of Cs132Vertex, suitable
 * for use within a Cs132Graph
 * 
 * @author Sharon Tuttle
 * @version 4-30-03
 */

public class Cs132SimpleVertex implements Cs132Vertex
{
    /*----------------------------------------------------------------
     fields
    ------------------------------------------------------------------*/
    Comparable key;
    Object     value;
    boolean    visitedFlag;
    
    /*----------------------------------------------------------------
     constructors
    -----------------------------------------------------------------*/
    
    public Cs132SimpleVertex(Comparable k, Object val)
    {
        this.key = k;
        this.value = val;
        this.visitedFlag = false;
    }
    
    /*----------------------------------------------------------------
     accessors
    ------------------------------------------------------------------*/
    
    /*-----------------------------------------------------------------
     getKey()
     Purpose: returns the value of the key for this vertex
    --------------------------------------------------------------------*/
    public Comparable getKey()
    {
        return this.key;
    }
    
    public Object getValue()
    {
        return this.value;
    }
    
    public boolean getVisited()
    {
        return this.visitedFlag;
    }
    
    /*-----------------------------------------------------------------
     modifiers
     (note this assumption: a node's key should NOT be changed once
      it is initially set... thus, there is no method setKey()
    ------------------------------------------------------------------*/
    
    public void setValue(Object newVal)
    {
        this.value = newVal;
    }
    
    public void setVisited(boolean newFlagVal)
    {
        this.visitedFlag = newFlagVal;
    }
    
    /*------------------------------------------------------------
     overridden methods
    ---------------------------------------------------------------*/
    
    public String toString()
    {
        return "Cs132SimpleVertex[key: " + this.key + 
               "\nvalue: " + this.value +
               "\nvisitedFlag: " + this.visitedFlag + "]\n";
    }
    
    /*--------------------------------------------------------------
     other methods
    ----------------------------------------------------------------*/
}