/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.graph.structure;
/**
* Represents an edge in a directed graph. A directed edge catagorizes its
* nodes as originating (in node), and terminating (out node). The edge is an
* <B>out edge</B> of its <B>in node</B> and an <B>in edge</B> to its <B>out
* node</B>.
*
* @see DirectedGraph
* @author Justin Deoliveira, Refractions Research Inc, jdeolive@refractions.net
*
*
* @source $URL$
*/
public interface DirectedEdge extends Edge, DirectedGraphable {
/**
* Returns the originating (in) node of the edge.
*
* @return The directed node at the source of the edge.
*/
public DirectedNode getInNode();
/**
* Returns the terminating (out) node of the edge.
*
* @return The directed node at the destination of the edge.
*/
public DirectedNode getOutNode();
}