Added serializer/deserializer for invitables

Author: christophermark

src/main/java/com/robinpowered/sdk/RobinServiceFactory.java

@@ -6,8 +6,10 @@
 import com.robinpowered.sdk.credential.Credential;
 import com.robinpowered.sdk.exception.RobinExceptionHandler;
 import com.robinpowered.sdk.model.Account;
+import com.robinpowered.sdk.model.Invitable;
 import com.robinpowered.sdk.model.Urn;
 import com.robinpowered.sdk.model.adapter.AccountReferenceAdapter;
+import com.robinpowered.sdk.model.adapter.InvitableAdapter;
 import com.robinpowered.sdk.model.adapter.JodaDateTimeAdapter;
 import com.robinpowered.sdk.model.adapter.RobinTypeAdapterFactory;
 import com.robinpowered.sdk.model.adapter.UrnAdapter;
@@ -60,6 +62,7 @@ protected Converter getResponseDataConverter() {
                 // Set our naming policy to transform underscores <-> camelCase
                 .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
                 .registerTypeAdapter(DateTime.class, new JodaDateTimeAdapter())
+                .registerTypeAdapter(Invitable.class, new InvitableAdapter())
                 .registerTypeAdapterFactory(new RobinTypeAdapterFactory())
                 .registerTypeAdapter(Urn.class, new UrnAdapter())
                 .registerTypeHierarchyAdapter(Account.Reference.class, new AccountReferenceAdapter())

src/main/java/com/robinpowered/sdk/model/adapter/InvitableAdapter.java

@@ -0,0 +1,51 @@
+package com.robinpowered.sdk.model.adapter;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import com.robinpowered.sdk.model.Invitable;
+import com.robinpowered.sdk.model.Invitee;
+
+import java.lang.reflect.Type;
+
+/**
+ * Handles adapting {@link Invitable} from string representations.
+ */
+public class InvitableAdapter implements JsonDeserializer<Invitable>, JsonSerializer<Invitable> {
+
+    /**
+     * Build an InvitableAdapter
+     */
+    public InvitableAdapter() {
+    }
+
+    @Override
+    public Invitable deserialize(
+        JsonElement json,
+        Type typeOfT,
+        JsonDeserializationContext context
+    ) throws JsonParseException {
+
+            JsonObject object = json.getAsJsonObject();
+                boolean isInvitation = object.has("email") && !object.has("id");
+                boolean isInivtee = object.has("email")
+                        && object.has("id");
+
+                if (isInvitation) {
+                    return context.deserialize(object, Invitee.Invitation.class);
+                } else if (isInivtee) {
+                    return context.deserialize(object, Invitee.class);
+                }
+
+        return null;
+    }
+
+    @Override
+    public JsonElement serialize(Invitable invitable, Type typeOfSrc, JsonSerializationContext context) {
+        return context.serialize(invitable);
+    }
+}