package org.madore.damlengine;

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

public class TodoAttr extends TodoItem {

    protected static Map<String,Method> damlHandlers;

    {
	Class[] handlerArgTypes = new Class[]{ TodoAttr.class };
	damlHandlers = new HashMap<String,Method>();
	try {
	    damlHandlers.put("xempty",
			     XemptyAttrHandler.class.getMethod("handle", handlerArgTypes));
	} catch (NoSuchMethodException e) {
	    // FIXME: this isn't good...
	    throw new Error("this is impossible");
	}
    }

    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 void dispatch() {
	Method handler;
	String nsuri = attr.getNamespaceURI();
	if ( nsuri != null && nsuri.equals(DamlEngine.DAML_NS) ) {
	    handler = damlHandlers.get(attr.getLocalName());
	} else
	    handler = null;
	try {
	    if ( handler != null )
		handler.invoke(null, new Object[]{this});
	} catch (IllegalAccessException e) {
	    // FIXME: this isn't good...
	    throw new Error("this is impossible");
	} catch (InvocationTargetException e) {
	    // FIXME: this isn't good...
	    throw new Error("this is impossible");
	}
    }

}