ActivityPub: fix empty object serialization

2 files changed, 31 insertions, 0 deletions

diff --git a/src/main/java/com/juick/www/api/activity/helpers/ContextTypeFilter.java b/src/main/java/com/juick/www/api/activity/helpers/ContextTypeFilter.java
new file mode 100644
index 00000000..e8a1dfab
--- /dev/null
+++ b/src/main/java/com/juick/www/api/activity/helpers/ContextTypeFilter.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2008-2021, Juick
+ *
+ * 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 com.juick.www.api.activity.helpers;
+
+public class ContextTypeFilter {
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof String)) {
+            return true;
+        }
+        return ((String)obj).equals("Context");
+    }
+}
diff --git a/src/main/java/com/juick/www/api/activity/model/Context.java b/src/main/java/com/juick/www/api/activity/model/Context.java
index f5d95d24..66259b7b 100644
--- a/src/main/java/com/juick/www/api/activity/model/Context.java
+++ b/src/main/java/com/juick/www/api/activity/model/Context.java
@@ -19,6 +19,7 @@ package com.juick.www.api.activity.model;
 
 import com.fasterxml.jackson.annotation.*;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.juick.www.api.activity.helpers.ContextTypeFilter;
 import com.juick.www.api.activity.helpers.LinkValueDeserializer;
 import com.juick.www.api.activity.model.activities.*;
 import com.juick.www.api.activity.model.objects.*;
@@ -78,6 +79,7 @@ public class Context {
         this.id = id;
     }
 
+    @JsonInclude(value = JsonInclude.Include.CUSTOM, valueFilter = ContextTypeFilter.class)
     public String getType() {
         return getClass().getSimpleName();
     }