support null by OffsetDateTimeAdapter

Author: alllexey-dev

src/main/java/api/myitmo/adapters/OffsetDateTimeAdapter.java

@@ -3,24 +3,29 @@
 import com.google.gson.TypeAdapter;
 import com.google.gson.stream.JsonReader;
 import com.google.gson.stream.JsonWriter;
+import com.google.gson.stream.JsonToken;
 
 import java.io.IOException;
 import java.time.OffsetDateTime;
 
 public class OffsetDateTimeAdapter extends TypeAdapter<OffsetDateTime> {
+
     @Override
-    public void write(JsonWriter jsonWriter, OffsetDateTime offsetDateTime) throws IOException {
-        jsonWriter.value(offsetDateTime.toString());
+    public void write(JsonWriter out, OffsetDateTime value) throws IOException {
+        if (value == null) {
+            out.nullValue();
+            return;
+        }
+        out.value(value.toString());
     }
 
     @Override
     public OffsetDateTime read(JsonReader in) throws IOException {
-        if (in.peek() == com.google.gson.stream.JsonToken.NULL) {
+        if (in.peek() == JsonToken.NULL) {
             in.nextNull();
             return null;
         }
 
-        String dateString = in.nextString();
-        return OffsetDateTime.parse(dateString);
+        return OffsetDateTime.parse(in.nextString());
     }
-}
+}