external-provider: add (experimental) external provider

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainExternalContract.java

@@ -0,0 +1,35 @@
+package org.sufficientlysecure.keychain.provider;
+
+
+import android.net.Uri;
+import android.provider.BaseColumns;
+
+import org.sufficientlysecure.keychain.Constants;
+
+
+public class KeychainExternalContract {
+
+    // this is in KeychainExternalContract already, but we want to be double
+    // sure this isn't mixed up with the internal one!
+    public static final String CONTENT_AUTHORITY_EXTERNAL = Constants.PROVIDER_AUTHORITY + ".exported";
+
+    private static final Uri BASE_CONTENT_URI_EXTERNAL = Uri
+            .parse("content://" + CONTENT_AUTHORITY_EXTERNAL);
+
+    public static final String BASE_EMAIL_STATUS = "email_status";
+
+    public static class EmailStatus implements BaseColumns {
+        public static final String EMAIL_ADDRESS = "email_address";
+        public static final String EMAIL_STATUS = "email_status";
+
+        public static final Uri CONTENT_URI = BASE_CONTENT_URI_EXTERNAL.buildUpon()
+                .appendPath(BASE_EMAIL_STATUS).build();
+
+        public static final String CONTENT_TYPE
+                = "vnd.android.cursor.dir/vnd.org.sufficientlysecure.keychain.provider.email_status";
+    }
+
+    private KeychainExternalContract() {
+    }
+
+}