The service metadata document describes the structure of all resources in the service. This structural metadata makes it easy to understand a service. We can explore service metadata at the address “$metadata” relative to the service root.
To display dialogs and popup controls over the application UI
To make parts of your view reusable
Following are some of the service metadata annotations which are common and a front end developer must know these in order to understand the service and integrate it:
An independent and reusable part that can be used to structure SAPUI5 applications
A standalone unit testing library for JavaScript that provides spies, stubs, and mocks
Call QUnit.test() in your test code with a speaking test description and a callback that contains at least one assertion.
They are representations of states such as success, warning, and error.
on metadataLoaded - createEntry - submit - on success
To generate an initial set of files that serve as the starting point for the development of a productive application
The PullToRefresh control: It is represented as a simple button on non-touch devices, but the user needs to pull the page content down on touch devices to refresh it.
SAPUI5 uses data binding to bind two data sources or information sources together to keep them in sync. This means: All changes in one source are also reflected in the other one.
Fragments are very light weight UI controls. Fragments are not completely like views but they act like a view. Fragments are defined similar like views and are names like “Fragment.fragment.xml“.
It is the first point of the application, it serves as an index, which encapsulates all the application details, like view names, routing details, main view, applications type(Full Screen or SplitApp), application service configuration etc.
There are 2 types of compponents:
Set the “visible” property of the control to “true” or “false”.
<Button text="Save Draft" icon="sap-icon://save" />
To an aggregation binding
Sap uses two mechanisms, routing and EventBus. Routing Is specifically used for bookmarking the URL. We define routing in component.js within the metadata. It also defines the navigation path and hash changer which is used at the runtime to change the url of the particular screen.
In the "models" section of the manifest.json file
The SAPUI5 version must be available in your target deployment system.
Register to the patternMatched event of the route.
As HTML5 world is the new age front technology across all aspect of internet applications SAP was kind of trailing in this age because SAP was using age old WebDynpro for building SAP Web Applications which lacks in rich and user-friendly UI. SAP identified this and came up with its own custom HTML5 library i.e. SAPUI5.
We need to use formatter when we need to perform some changes on the back end property data on the front end.
we can use formatter while data binding to a property like as follows:
oControl = new sap.ui.commons.TextField({
value : {path : “/path”, formatter : function(oEvent){
return “Value:”+oEvent;
}}});
Fragments are created without controllers, they don’t have their own controllers they share controller of the view which is invoking it.
SAPUI5 has following predefined four data models available:
'Tiny', 'Small', 'Medium' or 'Large'
When you realize that you need to reuse this code in several other places and views in your app.
As many as needed
HTML5 is a markup language and it doesn’t have programming capabilities but SAP UI5 is a framework which is based on MVC approach to build web applications. HTML5 is mainly for the purpose of creating a simple webpage without formatting and logic but UI5 provides standard style and components to build rich UIs.
sap.ui.model.FilterOperator.LT
Call the getSource() method at the event object parameter.
Use the URL parameter sap-ds-debug=true.