Baton deprecated

based on this oxpedia article

Part of extension points system is a structure called baton which serves as an context object. The baton passed back through callbacks within programmatic flow allowing data exchange between extension points.

attributes

data: usually contains current entity object, also used for data exchange
options: contains data such as the current active application if a baton is used comprehensively
flow:
- disabled: stores disabled extensions (managed via baton.disable(pointId, extensionId))
$: used to reference a jQuery node object

disable extensions

 //disable
 baton.disable(pointid, extensionid);

 //is disabled
 var isDisabled = baton.isDisabled(pointid, extensionid);

example

 var pointid = 'io.ox/mail/detail',
     extensionid = 'example3',
     node = $('div'),
     baton = ext.Baton();

//disable extension
//returns undefined
baton.disable(pointid,extensionid);

//invoke extension with baton instance 
ext.point(pointid).invoke('draw', node, baton)

data exchange

example

 //extension using baton to store data
 {
     id: 'example1',
     index: 100,
     draw: function (baton) {
         //get the currenty process mail object
         var mail = baton.data;
         //append subject to current node referenced as this
         this.append(
             $('div').text(mail.subject);
         )
         //extend mail object to store some flag
         mail.drawn = mail.drawn || {};
         mail.drawn.subject = true;
         //disable extension3
         baton.disable()
     }
 };
 {
     id: 'example2',
     index: 200,
     draw: function (baton) {
         //get the currenty process mail object
         var mail = baton.data;
         //use value set by 'example1'
         if(mail && mail.drawn && mail.drawn.subject) {
             //do something
         }
     }
 };
 {
     id: 'example3',
     index: 300,
     draw: function (baton) {
         //wil not be executed if baton from 'disable example' is used
     }
 };

ensure

ensure that submitted object is instanceof baton
return obj if it's an instanceof baton
return new baton instance where baton.data is extended by obj or obj.data (if exists)

var baton = ext.Baton.ensure(obj)

example

 //new baton.data extended by object
 var baton = ext.Baton.ensure({ id: 2 })