Refactor with adding unit test for OpenstackNetworkingUtil
Change-Id: Ie116b9215fb53ecc6a06d75da6d29ef2f2cb1d6a
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java
new file mode 100644
index 0000000..ffd5ab7
--- /dev/null
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2018-present Open Networking 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.
+ */
+package org.onosproject.openstacknetworking.util;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.openstack4j.core.transport.ObjectMapperSingleton;
+import org.openstack4j.model.ModelEntity;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.InputStream;
+
+import static com.fasterxml.jackson.databind.SerializationFeature.INDENT_OUTPUT;
+
+/**
+ * An utility that used in openstack networking app.
+ */
+public final class OpenstackNetworkingUtil {
+
+ protected static final Logger log = LoggerFactory.getLogger(OpenstackNetworkingUtil.class);
+
+ /**
+ * Prevents object instantiation from external.
+ */
+ private OpenstackNetworkingUtil() {
+ }
+
+ /**
+ * Interprets JSON string to corresponding openstack model entity object.
+ *
+ * @param input JSON string
+ * @param entityClazz openstack model entity class
+ * @return openstack model entity object
+ */
+ public static ModelEntity jsonToModelEntity(InputStream input, Class entityClazz) {
+ ObjectMapper mapper = new ObjectMapper();
+ try {
+ JsonNode jsonTree = mapper.enable(INDENT_OUTPUT).readTree(input);
+ log.trace(new ObjectMapper().writeValueAsString(jsonTree));
+ return ObjectMapperSingleton.getContext(entityClazz)
+ .readerFor(entityClazz)
+ .readValue(jsonTree);
+ } catch (Exception e) {
+ throw new IllegalArgumentException();
+ }
+ }
+
+ /**
+ * Converts openstack model entity object into JSON object.
+ *
+ * @param entity openstack model entity object
+ * @param entityClazz openstack model entity class
+ * @return JSON object
+ */
+ public static ObjectNode modelEntityToJson(ModelEntity entity, Class entityClazz) {
+ ObjectMapper mapper = new ObjectMapper();
+ try {
+ String strModelEntity = ObjectMapperSingleton.getContext(entityClazz)
+ .writerFor(entityClazz)
+ .writeValueAsString(entity);
+ log.trace(strModelEntity);
+ return (ObjectNode) mapper.readTree(strModelEntity.getBytes());
+ } catch (Exception e) {
+ throw new IllegalStateException();
+ }
+ }
+}