Class sap.ui.core.mvc.ControllerModule: sap/ui/core/mvc/Controller

oClassInfo might contain the same kind of information as described in sap.ui.base.EventProvider.extend.

The extension provider module provides the getControllerExtensions function which returns either directly an array of objects or a Promise that returns an array of objects when it resolves. These objects are object literals defining the methods and properties of the controller in a similar way as sap.ui.controller.

Example for a callback module definition (sync):

sap.ui.define("my/custom/sync/ExtensionProvider", ['jquery.sap.global'], function(jQuery) {
  var ExtensionProvider = function() {};
  ExtensionProvider.prototype.getControllerExtensions = function(sControllerName, sComponentId, bAsync) {
    if (!bAsync && sControllerName == "my.own.Controller") {
      // IMPORTANT: only return extensions for a specific controller
      return [{
        onInit: function() {
          // Do something here...
        },
        onAfterRendering: function() {
          // Do something here...
        },
        onButtonClick: function(oEvent) {
          // Handle the button click event
        }
      }
    }];
  };
  return ExtensionProvider;
}, true);

Example for a callback module definition (async):

sap.ui.define("my/custom/async/ExtensionProvider", ['jquery.sap.global'], function(jQuery) {
  var ExtensionProvider = function() {};
  ExtensionProvider.prototype.getControllerExtensions = function(sControllerName, sComponentId, bAsync) {
    if (bAsync && sControllerName == "my.own.Controller") {
      // IMPORTANT:
      // only return a Promise for a specific controller since it
      // requires the View/Controller and its parents to run in async
      // mode!
      return new Promise(function(fnResolve, fnReject) {
        fnResolve([{
          onInit: function() {
            // Do something here...
          },
          onAfterRendering: function() {
            // Do something here...
          },
          onButtonClick: function(oEvent) {
            // Handle the button click event
          }
        }]);
      }
    };
  };
  return ExtensionProvider;
}, true);

The lifecycle functions onInit, onExit, onBeforeRendering and onAfterRendering are added before or after the lifecycle functions of the original controller. The event handler functions, such as onButtonClick, are replacing the original controller's function.

When using an async extension provider you need to ensure that the view is loaded in async mode.

In both cases, return undefined if no controller extension shall be applied.