Start of restructuring to allow overlays include subset of providers

This allows us to build a UnifiedEmail that supports all providers
and use this base to build applications that only supports a subset
of the providers

Made AccountCacheProvider and ConversationProvider abstract.  This allows
the extending class to specify the authority that should be used (This allows
both UnifiedEmail and Gmail to be installed at the same time)

Change-Id: I31295f4630906e7182e423fcbb7b47c33ba4cd4f

1 files changed, 11 insertions, 5 deletions

diff --git a/src/com/android/mail/providers/AccountCacheProvider.java b/src/com/android/mail/providers/AccountCacheProvider.java
index 8f1fcb810..e2120bf25 100644
--- a/src/com/android/mail/providers/AccountCacheProvider.java
+++ b/src/com/android/mail/providers/AccountCacheProvider.java
@@ -41,19 +41,25 @@ import java.util.Map;
  * In the future, once other processes can add new accounts, this could allow other "mail"
  * applications have their content appear within the application
  */
-public final class AccountCacheProvider extends ContentProvider {
-
-    private static final String AUTHORITY = "com.android.mail.accountcache";
-    private static final String BASE_URI_STRING = "content://" + AUTHORITY;
+public abstract class AccountCacheProvider extends ContentProvider {
 
     private final static Map<String, CachedAccount> ACCOUNT_CACHE = Maps.newHashMap();
 
+    private static String sAuthority;
+
+    /**
+     * Allows the implmenting provider to specify the authority that should be used.
+     */
+    protected abstract String getAuthority();
+
+
     public static Uri getAccountsUri() {
-        return Uri.parse(BASE_URI_STRING + "/");
+        return Uri.parse("content://" + sAuthority + "/");
     }
 
     @Override
     public boolean onCreate() {
+        sAuthority = getAuthority();
         return true;
     }