sPFFramework/src/main/java/it/polimi/spf/framework/security/ApplicationRegistry.java
AppAuth getAppAuthorizationByAppId(String appId) {
		String where = Contract.COLUMN_APP_IDENTIFIER + " = ?";
		String args[] = { appId };
		Cursor c = mRegistryTable.getReadableDatabase().query(Contract.TABLE_NAME, null, where, args, null, null, null);
		AppAuth auth = null;
		if (c.moveToFirst()) {
			auth = appAuthFromCursor(c);
		}
		c.close();
		return auth;
	}
AppAuth getAppAuthorizationByAppId(String appId) {
		String where = Contract.COLUMN_APP_IDENTIFIER + " = ?";
		String args[] = { appId };
		Cursor c = mRegistryTable.getReadableDatabase().query(Contract.TABLE_NAME, null, where, args, null, null, null);
		AppAuth auth = null;
		if (c.moveToFirst()) {
			auth = appAuthFromCursor(c);
		}
		c.close();
		return auth;
	}
Retrieves an appauth given the identifier of an application

@param appId
- the Id of the application
@return the appAuth of the application, or null if the app is not
installed