Added support in AbstractMapper for AbstractData's own types (don't ask me why those were missing :D)

Author: JanHolger

src/main/java/org/javawebstack/abstractdata/AbstractMapper.java

@@ -2,6 +2,7 @@
 
 import com.google.gson.*;
 import com.google.gson.annotations.Expose;
+import org.javawebstack.abstractdata.util.GsonAbstractDataAdapter;
 
 public class AbstractMapper {
 
@@ -44,6 +45,11 @@ private Gson gson(){
         if(gson != null)
             return gson;
         GsonBuilder builder = new GsonBuilder()
+                .registerTypeAdapter(AbstractElement.class, new GsonAbstractDataAdapter<>())
+                .registerTypeAdapter(AbstractObject.class, new GsonAbstractDataAdapter<>())
+                .registerTypeAdapter(AbstractArray.class, new GsonAbstractDataAdapter<>())
+                .registerTypeAdapter(AbstractPrimitive.class, new GsonAbstractDataAdapter<>())
+                .registerTypeAdapter(AbstractNull.class, new GsonAbstractDataAdapter<>())
                 .setFieldNamingPolicy(namingPolicy.getGsonPolicy());
         if(dateFormat != null)
             builder.setDateFormat(dateFormat);

src/main/java/org/javawebstack/abstractdata/util/GsonAbstractDataAdapter.java

@@ -0,0 +1,18 @@
+package org.javawebstack.abstractdata.util;
+
+import com.google.gson.*;
+import org.javawebstack.abstractdata.AbstractElement;
+
+import java.lang.reflect.Type;
+
+public class GsonAbstractDataAdapter<T extends AbstractElement> implements JsonSerializer<T>, JsonDeserializer<T> {
+
+    public T deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
+        return (T) AbstractElement.fromJson(jsonElement);
+    }
+
+    public JsonElement serialize(T t, Type type, JsonSerializationContext jsonSerializationContext) {
+        return t.toJson();
+    }
+
+}