package org.madore.damlengine;

import java.util.Vector;
import java.util.HashMap;
import org.w3c.dom.*;

public abstract class ElementHandler {

    public void handleAttributes(TodoElement that) {
	NamedNodeMap attrs = that.node.getAttributes();
	Node attr;
	Vector<TodoAttr> toProcess = new Vector<TodoAttr>();
	for ( int i=0 ; (attr=attrs.item(i)) != null ; i++ ) {
	    TodoAttr it = new TodoAttr((Attr)attr, that.node, that.context,
				       new HashMap<String,Object>());
	    toProcess.add(it);
	}
	that.ownerDeque.registerAtStart(toProcess);
    }

    public void handleNodeOnly(TodoElement that) {
	System.err.println("handling a "+that.node.getNodeName()+" element");
	NodeList children = that.node.getChildNodes();
	Node child;
	Vector<TodoElement> toProcess = new Vector<TodoElement>();
	for ( int i=0 ; (child=children.item(i)) != null ; i++ ) {
	    if ( child.getNodeType() == Node.ELEMENT_NODE ) {
		TodoElement it = new TodoElement((Element)child, that.context,
						 new HashMap<String,Object>());
		toProcess.add(it);
	    }
	}
	that.ownerDeque.registerAtStart(toProcess);
    }

    public void handle(TodoElement that) {
	assert(that.ownerDeque != null);
	handleAttributes(that);
	handleNodeOnly(that);
    }

}