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

src/main/java/io/kamax/mxisd/invitation/ThreePidInvite.java

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+/*
+ * 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.invitation;
+
+import io.kamax.matrix._MatrixID;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ThreePidInvite implements IThreePidInvite {
+
+    private _MatrixID sender;
+    private String medium;
+    private String address;
+    private String roomId;
+    private Map<String, String> properties;
+
+    public ThreePidInvite(_MatrixID sender, String medium, String address, String roomId) {
+        this.sender = sender;
+        this.medium = medium;
+        this.address = address;
+        this.roomId = roomId;
+        this.properties = new HashMap<>();
+    }
+
+    public ThreePidInvite(_MatrixID sender, String medium, String address, String roomId, Map<String, String> properties) {
+        this(sender, medium, address, roomId);
+        this.properties = properties;
+    }
+
+    @Override
+    public _MatrixID getSender() {
+        return sender;
+    }
+
+    @Override
+    public String getMedium() {
+        return medium;
+    }
+
+    @Override
+    public String getAddress() {
+        return address;
+    }
+
+    @Override
+    public String getRoomId() {
+        return roomId;
+    }
+
+    @Override
+    public Map<String, String> getProperties() {
+        return properties;
+    }
+
+}