function define(f)
{
	JsonGMLParser = f();
}
importScripts('txml.js');
importScripts('JsonGMLParser.js');

self.addEventListener('message', function (e) {
    var gmlParser = new JsonGMLParser(true /*extractAttributes */,
                                      true  /*xy */,
                                      undefined /*gmlnsm*/,
                                      undefined /*wfsnsm*/,
                                      undefined /*featureName*/,
                                      e.data.geometryFieldName);
	var data = e.data;
	var json = tXml(data.text, {simplify:true});
	var features = gmlParser.read(json);
	delete data.text;
	data.features = features;
	postMessage(data);
	/*
	load('data.json', function(xhr) {	
		var result = xhr.responseText;
		var features = gmlParser.read(data.document);
		postMessage({id: data.id, features: features});
	});
	*/
});
/*
//simple XHR request in pure JavaScript
function load(url, callback) {
	var xhr;

	if(typeof XMLHttpRequest !== 'undefined') xhr = new XMLHttpRequest();
	else {
		var versions = ["MSXML2.XmlHttp.5.0", 
			 	"MSXML2.XmlHttp.4.0",
			 	"MSXML2.XmlHttp.3.0", 
			 	"MSXML2.XmlHttp.2.0",
			 	"Microsoft.XmlHttp"]

		for(var i = 0, len = versions.length; i < len; i++) {
		try {
			xhr = new ActiveXObject(versions[i]);
			break;
		}
			catch(e){}
		} // end for
	}
		
	xhr.onreadystatechange = ensureReadiness;
		
	function ensureReadiness() {
		if(xhr.readyState < 4) {
			return;
		}
			
		if(xhr.status !== 200) {
			return;
		}

		// all is well	
		if(xhr.readyState === 4) {
			callback(xhr);
		}			
	}
		
	xhr.open('GET', url, true);
	xhr.send('');
}
*/