Created question in FIWARE Q/A platform on 04-02-2015 at 19:02
Please, ANSWER this question AT http://stackoverflow.com/questions/28329239/querying-ocb-from-javascript-wirecloud

Question:
Querying OCB from JavaScript (WireCloud)

Description:
I'm trying to get type fields for each attribute of my entities. Quering Orion and getting entities is not the problem (I do this through NGSI Source widget) but the way getting these parameters.

From NGSI Source (usual suscription to Orion instance):

var doInitialSubscription = function doInitialSubscription() {

this.subscriptionId = null;

this.ngsi_server = MashupPlatform.prefs.get('ngsi_server');
this.ngsi_proxy = MashupPlatform.prefs.get('ngsi_proxy');
this.connection = new NGSI.Connection(this.ngsi_server,

);

var types = MashupPlatform.prefs.get('ngsi_entities').split(new RegExp(',
s*'));
var entityIdList = [];
var entityId;
for (var i = 0; i < types.length; i++) {
entityId =

;
entityIdList.push(entityId);
}
var attributeList = null;
var duration = 'PT3H';
var throttling = null;
var notifyConditions = [

];
var options = {
flat: true,
onNotify: handlerReceiveEntity.bind(this),
onSuccess: function (data) {
this.subscriptionId = data.subscriptionId;
this.refresh_interval = setInterval(refreshNGSISubscription.bind(this), 1000 * 60 * 60 * 2); // each 2 hours
window.addEventListener("beforeunload", function ()

.bind(this));
}.bind(this)
};
this.connection.createSubscription(entityIdList, attributeList, duration, throttling, notifyConditions, options);
};
var handlerReceiveEntity = function handlerReceiveEntity(data) {
for (var entityId in data.elements)

};

To MyWidget:

MashupPlatform.wiring.registerCallback("entityInput", function (entityString) {
var entity;
entity = JSON.parse(entityString);
id = entity.id;
type = entity.type;
for(var attr in entity)

I'm trying to code something similar to obtain the value of type fields. How can I do that? (I'm sure it's quite easy...)