| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.cloudstack.framework.serializer; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| |
| public class JsonMessageSerializer implements MessageSerializer { |
| |
| // this will be injected from external to allow installation of |
| // type adapters needed by upper layer applications |
| private Gson _gson; |
| |
| private OnwireClassRegistry _clzRegistry; |
| |
| public JsonMessageSerializer() { |
| GsonBuilder gsonBuilder = new GsonBuilder(); |
| gsonBuilder.setVersion(1.5); |
| _gson = gsonBuilder.create(); |
| } |
| |
| public Gson getGson() { |
| return _gson; |
| } |
| |
| public void setGson(Gson gson) { |
| _gson = gson; |
| } |
| |
| public OnwireClassRegistry getOnwireClassRegistry() { |
| return _clzRegistry; |
| } |
| |
| public void setOnwireClassRegistry(OnwireClassRegistry clzRegistry) { |
| _clzRegistry = clzRegistry; |
| } |
| |
| @Override |
| public <T> String serializeTo(Class<?> clz, T object) { |
| assert (clz != null); |
| assert (object != null); |
| |
| StringBuffer sbuf = new StringBuffer(); |
| |
| OnwireName onwire = clz.getAnnotation(OnwireName.class); |
| if (onwire == null) |
| throw new RuntimeException("Class " + clz.getCanonicalName() + " is not declared to be onwire"); |
| |
| sbuf.append(onwire.name()).append("|"); |
| sbuf.append(_gson.toJson(object)); |
| |
| return sbuf.toString(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public <T> T serializeFrom(String message) { |
| assert (message != null); |
| int contentStartPos = message.indexOf('|'); |
| if (contentStartPos < 0) |
| throw new RuntimeException("Invalid on-wire message format"); |
| |
| String onwireName = message.substring(0, contentStartPos); |
| Class<?> clz = _clzRegistry.getOnwireClass(onwireName); |
| if (clz == null) |
| throw new RuntimeException("Onwire class is not registered. name: " + onwireName); |
| |
| return (T)_gson.fromJson(message.substring(contentStartPos + 1), clz); |
| } |
| } |