--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.svnfm.simulator.oauth;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import java.util.ArrayList;
+import java.util.Collection;
+import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.GsonHttpMessageConverter;
+import org.springframework.security.oauth2.common.OAuth2AccessToken;
+
+/**
+ * Configures message converter
+ */
+@Configuration
+public class JsonSerializerConfiguration {
+
+ @Bean
+ public HttpMessageConverters customConverters() {
+ final Collection<HttpMessageConverter<?>> messageConverters = new ArrayList<>();
+
+ final Gson gson = new GsonBuilder()
+ .registerTypeHierarchyAdapter(OAuth2AccessToken.class, new OAuth2AccessTokenAdapter()).create();
+ final GsonHttpMessageConverter gsonHttpMessageConverter = new GsonHttpMessageConverter(gson);
+ messageConverters.add(gsonHttpMessageConverter);
+ return new HttpMessageConverters(true, messageConverters);
+ }
+}