dojo.provide("dojo.data.old.Observable");
dojo.require("dojo.lang.common");
dojo.require("dojo.lang.assert");
// -------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------
dojo.data.old.Observable = function() {
};
// -------------------------------------------------------------------
// Public instance methods
// -------------------------------------------------------------------
dojo.data.old.Observable.prototype.addObserver = function(/* object */ observer) {
/**
* summary: Registers an object as an observer of this item,
* so that the object will be notified when the item changes.
*/
dojo.lang.assertType(observer, Object);
dojo.lang.assertType(observer.observedObjectHasChanged, Function);
if (!this._arrayOfObservers) {
this._arrayOfObservers = [];
}
if (!dojo.lang.inArray(this._arrayOfObservers, observer)) {
this._arrayOfObservers.push(observer);
}
};
dojo.data.old.Observable.prototype.removeObserver = function(/* object */ observer) {
/**
* summary: Removes the observer registration for a previously
* registered object.
*/
if (!this._arrayOfObservers) {
return;
}
var index = dojo.lang.indexOf(this._arrayOfObservers, observer);
if (index != -1) {
this._arrayOfObservers.splice(index, 1);
}
};
dojo.data.old.Observable.prototype.getObservers = function() {
/**
* summary: Returns an array with all the observers of this item.
*/
return this._arrayOfObservers; // Array or undefined
};