Java tutorial
/* * Copyright (C) 2015 Alex Neeky * * 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 com.slx.funstream.utils; 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.slx.funstream.model.ChatMessage; import com.slx.funstream.model.ChatResponse; import com.slx.funstream.model.Result; import com.slx.funstream.rest.APIUtils; import java.lang.reflect.Type; import java.util.Arrays; public class ChatResponseDeserializer implements JsonDeserializer<ChatResponse> { private static final String STATUS = "status"; private static final String RESULT = "result"; private static final String MESSAGE = "message"; @Override public ChatResponse deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { JsonObject response = json.getAsJsonObject(); final String status = response.get(STATUS).getAsString(); ChatResponse chatResponse = new ChatResponse(); chatResponse.setStatus(status); if (status.equals(APIUtils.OK_STATUS)) { // messages if (response.has(RESULT) && response.get(RESULT).isJsonArray()) { ChatMessage[] messages = context.deserialize(response.get(RESULT), ChatMessage[].class); chatResponse.setResult(new Result(Arrays.asList(messages))); } } else { JsonObject result = response.get(RESULT).getAsJsonObject(); chatResponse.setResult(new Result(result.get(MESSAGE).getAsString())); } return chatResponse; } }