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package org.madore.damlengine;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import java.util.HashMap;
import org.w3c.dom.Element;
import org.w3c.dom.Attr;

public abstract class TodoAttr extends TodoItem {

    protected static Map<String,Constructor<? extends TodoAttr>> damlAttrConstructors;

    static {
	damlAttrConstructors = new HashMap<String,Constructor<? extends TodoAttr>>();
	Class[] argTypes = new Class[]{ Attr.class, Element.class, Map.class, Map.class };
	try {
	    damlAttrConstructors.put("xempty", TodoXemptyAttr.class.getConstructor(argTypes));
	} catch (NoSuchMethodException e) {
	    // FIXME: Do something intelligent here!
	}
    }

    Attr attr;
    Element owner;
    Map<String,Object> context;
    Map<String,Object> options;

    public TodoAttr(Attr attr, Element owner,
		    Map<String,Object> context, Map<String,Object> options) {
	this.attr = attr;
	this.owner = owner;
	this.context = context;
	this.options = options;
    }

    public static TodoAttr getTodoAttr(Attr attr, Element owner,
				       Map<String,Object> context,
				       Map<String,Object> options) {
	Constructor<? extends TodoAttr> constructor = null;
	String nsuri = attr.getNamespaceURI();
	if ( nsuri != null && nsuri.equals(DamlEngine.DAML_NS) )
	    constructor = damlAttrConstructors.get(attr.getLocalName());
	if ( constructor != null )
	    try {
		return constructor.newInstance(new Object[]{attr, owner, context, options});
	    } catch (InstantiationException e) {
		// FIXME: Do something intelligent here!
	    } catch (IllegalAccessException e) {
		// FIXME: Do something intelligent here!
	    } catch (InvocationTargetException e) {
		// FIXME: Do something intelligent here!
	    }
	return null;
    }

}