/*
 * CS3DiGraph.java
 *
 * Version:
 *     $Id$
 *
 * Revisions:
 *     $Log$
 */

import java.util.Collection;

/**
 * Write a description of class CS3DiGraph here.
 *
 * @author Danny Lee
 */
public class CS3DiGraph implements DiGraph
{

    

    public CS3DiGraph() {
        
    }

    public void addEdge( Object fromKey, Object toKey, Object data ) {
        
    }

    public void addVertex( Object key, Object data ) {
        
    }

    public void clear() {
        
    }

    public Collection edgeData() {
        return null;
    }

    public Object getEdgeData( Object fromKey, Object toKey ) {
        return null;
    }

    public Object getVertexData( Object key ) {
        return null;
    }

    public int inDegree( Object key ) {
        return -1;
    }

    public boolean isEdge( Object fromKey, Object toKey ) {
        return false;
    }

    public boolean isVertex( Object key ) {
        return false;
    }

    public Collection neighborData( Object key ) {
        return null;
    }

    public Collection neighborKeys( Object key ) {
        return null;
    }

    public int numVertices() {
        return -1;
    }

    public int outDegree( Object key ) {
        return -1;
    }

    public Collection vertexData() {
        return null;
    }

    public Collection vertexKeys() {
        return null;
    }

} // CS3DiGraph