TraversalCallback.java

/**
 * Copyright (c) 2003-2009, Xith3D Project Group all rights reserved.
 * 
 * Portions based on the Java3D interface, Copyright by Sun Microsystems.
 * Many thanks to the developers of Java3D and Sun Microsystems for their
 * innovation and design.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * Neither the name of the 'Xith3D Project Group' nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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package org.xith3d.scenegraph.traversal;

import org.xith3d.scenegraph.*;

/**
 * An implementation of this interface is passed to the traverse method
 * of a Node to implement the traversal operation.
 * 
 * @author Marvin Froehlich (aka Qudus)
 * @author Amos Wenger (aka BlueSky) [javadoc correction]
 */
public interface TraversalCallback
{
    /**
     * This method is called for each Node in the traversed Group.
     * It implements the operation to be done for the Nodes.
     * 
     * @param node the current Node in the traversal
     * @return if false, the traversal is stopped after this node
     */
    public boolean traversalOperation( Node node );
    
    /**
     * This method is called for each Group in the traversal.
     * It must return true to be further traversed (and its children)
     * 
     * @param group the Group to be checked
     * @return if false the traversal is not stopped, but the children are not further traversed
     */
    public boolean traversalCheckGroup( GroupNode group );
}