| This library (com.android.mediadrm.signer.jar) is a shared java library |
| containing classes required by unbundled apps running on devices that use |
| the certficate provisioning and private key signing capabilities provided |
| by the MediaDrm API. |
| |
| --- Rules of this library --- |
| o This library is effectively a PUBLIC API for unbundled CAST receivers |
| that may be distributed outside the system image. So it MUST BE API STABLE. |
| You can add but not remove. The rules are the same as for the |
| public platform SDK API. |
| o This library can see and instantiate internal platform classes, but it must not |
| expose them in any public method (or by extending them via inheritance). This would |
| break clients of the library because they cannot see the internal platform classes. |
| |
| This library is distributed in the system image, and loaded as |
| a shared library. So you can change the implementation, but not |
| the interface. In this way it is like framework.jar. |
| |
| --- Why does this library exist? --- |
| |
| Unbundled apps cannot use internal platform classes. |
| |
| This library will eventually be replaced when the provisioned certificate- |
| based signing infrastructure that is currently defined in the support library |
| is reintegrated with the framework in a new API. That API isn't ready yet so |
| this library is a compromise to make new capabilities available to the system |
| without exposing the full surface area of the support library. |
| |
