/*
 * Copyright 2005-2010 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 
package org.wamblee.system.graph;

/**
 * Visitor of a graph.
 * 
 * @author Erik Brakkee.
 * 
 */
public interface Visitor {
    /**
     * Visits a node. Called by {@link Graph#accept(Visitor)}.
     * 
     * @param aNode
     *            Node to visit.
     */
    void visitNode(Node aNode);

    /**
     * Visits a node. Called by {@link Graph#accept(Visitor)}.
     * 
     * @param aEdge
     *            Edge to visit.
     */
    void visitEdge(Edge aEdge);
}