Generate and Use C and C++ Components › Build an Aion BRE Component with an Interface Layer

Build an Aion BRE Component with an Interface Layer

To enable clients to invoke methods of an Aion BRE-generated component, it is necessary to specify which Aion BRE classes have their public methods exposed as an application programmer interface (API). The idea of exposing public methods of a class or classes as an API is the fundamental principle behind Aion BRE interface layers. The methods of a class can be exposed as a C, C++, Managed C++. Java, or COM API. To specify which Aion BRE classes are exposed, set the Export property for each desired class (using the Export check box on the Class Properties page). All public instance methods in those classes will be exposed when the application is built with the selected interface layer.

To create an API for an Aion BRE component, follow this list:

• Check the Export Class checkbox on the Properties tab of the Class Editor.
• Specify the instance methods that you wish to expose as public for an exported class on the Properties tab of the Method Editor.
• Select the desired Interface Layer on the Build Directives tab of the Libraries Property dialog. To open the Build Directive tab:
  1. From within the open Aion BRE application, highlight the Libraries node in the Project Workspace tree.
  2. Right-click and choose Properties.

     The Library Properties dialog displays.

     This dialog is used to (optionally) specify application-specific information, such as build details and comments.

  3. Click the Build Directives tab. In the Interface Layer field, choose C or C++ from the drop-down list.

Note: All fields on this tab are optional. The remaining fields are discussed in the "Running and Building Applications" chapter.

You can build the application as usual by choosing the Build item from the File menu.