// // 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 com.cloud.agent.transport; import java.lang.reflect.Array; import java.lang.reflect.Type; import java.util.ArrayList; import java.util.Iterator; import java.util.Map; import com.google.gson.Gson; import com.google.gson.JsonArray; 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.cloud.utils.exception.CloudRuntimeException; public class ArrayTypeAdaptor<T> implements JsonDeserializer<T[]>, JsonSerializer<T[]> { protected Gson _gson = null; public ArrayTypeAdaptor() { } public void initGson(Gson gson) { _gson = gson; } @Override public JsonElement serialize(T[] src, Type typeOfSrc, JsonSerializationContext context) { JsonArray array = new JsonArray(); for (T cmd : src) { JsonObject obj = new JsonObject(); obj.add(cmd.getClass().getName(), _gson.toJsonTree(cmd)); array.add(obj); } return array; } @Override @SuppressWarnings("unchecked") public T[] deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { JsonArray array = json.getAsJsonArray(); Iterator<JsonElement> it = array.iterator(); ArrayList<T> cmds = new ArrayList<T>(); while (it.hasNext()) { JsonObject element = (JsonObject)it.next(); Map.Entry<String, JsonElement> entry = element.entrySet().iterator().next(); String name = entry.getKey(); Class<?> clazz; try { clazz = Class.forName(name); } catch (ClassNotFoundException e) { throw new CloudRuntimeException("can't find " + name); } T cmd = (T)_gson.fromJson(entry.getValue(), clazz); cmds.add(cmd); } Class<?> type = ((Class<?>)typeOfT).getComponentType(); T[] ts = (T[])Array.newInstance(type, cmds.size()); return cmds.toArray(ts); } }