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package org.madore.damlengine;

import java.util.Map;
import java.util.HashMap;
import org.w3c.dom.Element;
import org.w3c.dom.Attr;

public abstract class TodoAttr extends TodoItem {

    public static abstract class Factory {
	public abstract TodoAttr newItem(Attr attr, Element owner,
					 Context ctx,
					 TodoItem.Options options);
    }

    protected static Map<String,Factory> damlAttrFactories;

    static {
	damlAttrFactories = new HashMap<String,Factory>();
	damlAttrFactories.put("xempty", new TodoXemptyAttr.Factory());
    }

    Attr attr;
    Element owner;

    public TodoAttr(Attr attr, Element owner,
		    Context ctx, TodoItem.Options options) {
	super(ctx, options);
	this.attr = attr;
	this.owner = owner;
    }

    public static TodoAttr getTodoAttr(Attr attr, Element owner,
				       Context ctx,
				       TodoItem.Options options) {
	Factory factory = null;
	String nsuri = attr.getNamespaceURI();
	if ( nsuri != null && nsuri.equals(DamlEngine.DAML_NS) )
	    factory = damlAttrFactories.get(attr.getLocalName());
	if ( factory == null )
	    return null;
	return factory.newItem(attr, owner, ctx, options);
    }

}