package org.simantics.g3d.scenegraph.base;

import java.util.List;





public interface INode {
	
	/**
     * 
     * @return unique node identifier
     */
    public Long getId();

	 /**
     * @return root node of the scene graph or <code>null</code> if this node is
     *         not part of a properly rooted scene graph hierarchy
     */
    public ParentNode<?> getRootNode();

    /**
     * @return Parent node reference or <code>null</code> if not set
     */
    public ParentNode<?> getParent();
    
    public String getParentRel();
    /**
     * Set parent node. This method is for scene graph internal use only and
     * should not be called outside the scene graph structure. This method
     * simply sets the parent node parent field, and does not affect on parent
     * node (i.e., should be called only from parent node).
     */
    public void setParent(ParentNode<?> parent, String name);

    /**
     * Perform cleanup for this node and for the child nodes. Any resources
     * (including child nodes) related to this node are unusable after this
     * operation. This method is for scene graph internal use only, thus should
     * not be called outside the scene graph structure.
     */
    public void cleanup();
    /**
     * Remove this node and its children from the scene graph.
     */
    public void remove();

    
    public void addListener(NodeListener listener);
	public void removeListener(NodeListener listener);
	
	public List<NodeListener> getListeners();

}