Bye bye Groovy, you won't be missed :(

src/main/java/io/kamax/mxisd/lookup/provider/IThreePidProvider.java

@@ -0,0 +1,45 @@
+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.mxisd.lookup.provider;
+
+import io.kamax.mxisd.lookup.SingleLookupReply;
+import io.kamax.mxisd.lookup.SingleLookupRequest;
+import io.kamax.mxisd.lookup.ThreePidMapping;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface IThreePidProvider {
+
+    boolean isEnabled();
+
+    boolean isLocal();
+
+    /**
+     * Higher has more priority
+     */
+    int getPriority(); // Should not be here but let's KISS for now
+
+    Optional<SingleLookupReply> find(SingleLookupRequest request);
+
+    List<ThreePidMapping> populate(List<ThreePidMapping> mappings);
+
+}