Java tutorial
/* * Copyright (C) 2014 Eric Butler * * 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.tapchatapp.android.client; import android.util.Log; import com.google.common.collect.ImmutableMap; 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.tapchatapp.android.app.TapchatApp; import com.tapchatapp.android.client.message.AwayMessage; import com.tapchatapp.android.client.message.BacklogCompleteMessage; import com.tapchatapp.android.client.message.BannedMessage; import com.tapchatapp.android.client.message.BufferArchivedMessage; import com.tapchatapp.android.client.message.BufferMeMsgMessage; import com.tapchatapp.android.client.message.BufferMsgMessage; import com.tapchatapp.android.client.message.BufferUnarchivedMessage; import com.tapchatapp.android.client.message.ChannelInitMessage; import com.tapchatapp.android.client.message.ChannelModeIsMessage; import com.tapchatapp.android.client.message.ChannelModeMessage; import com.tapchatapp.android.client.message.ChannelTimestampMessage; import com.tapchatapp.android.client.message.ChannelTopicMessage; import com.tapchatapp.android.client.message.ChannelUrlMessage; import com.tapchatapp.android.client.message.ConnectedMessage; import com.tapchatapp.android.client.message.ConnectingCancelledMessage; import com.tapchatapp.android.client.message.ConnectingFailedMessage; import com.tapchatapp.android.client.message.ConnectingFinishedMessage; import com.tapchatapp.android.client.message.ConnectingMessage; import com.tapchatapp.android.client.message.ConnectingRetryMessage; import com.tapchatapp.android.client.message.ConnectionDeletedMessage; import com.tapchatapp.android.client.message.EndOfBacklogMessage; import com.tapchatapp.android.client.message.ErrorMessage; import com.tapchatapp.android.client.message.HeaderMessage; import com.tapchatapp.android.client.message.HeartbeatEchoMessage; import com.tapchatapp.android.client.message.IdleMessage; import com.tapchatapp.android.client.message.InvalidCertMessage; import com.tapchatapp.android.client.message.JoinedChannelMessage; import com.tapchatapp.android.client.message.KickedChannelMessage; import com.tapchatapp.android.client.message.MakeBufferMessage; import com.tapchatapp.android.client.message.MakeServerMessage; import com.tapchatapp.android.client.message.Message; import com.tapchatapp.android.client.message.NickchangeMessage; import com.tapchatapp.android.client.message.NoticeMessage; import com.tapchatapp.android.client.message.OobIncludeMessage; import com.tapchatapp.android.client.message.OpenBufferMessage; import com.tapchatapp.android.client.message.PartedChannelMessage; import com.tapchatapp.android.client.message.QuitServerMessage; import com.tapchatapp.android.client.message.ResponseMessage; import com.tapchatapp.android.client.message.ServerDetailsChangedMessage; import com.tapchatapp.android.client.message.SocketClosedMessage; import com.tapchatapp.android.client.message.StatUserMessage; import com.tapchatapp.android.client.message.SysMsgsMessage; import com.tapchatapp.android.client.message.UnknownMessage; import com.tapchatapp.android.client.message.UserAwayMessage; import com.tapchatapp.android.client.message.UserBackMessage; import com.tapchatapp.android.client.message.UserChannelModeMessage; import com.tapchatapp.android.client.message.UserDetailsMessage; import com.tapchatapp.android.client.message.UserModeMessage; import com.tapchatapp.android.client.message.WaitingToRetryMessage; import com.tapchatapp.android.client.message.YouJoinedChannelMessage; import com.tapchatapp.android.client.message.YouNickchangeMessage; import com.tapchatapp.android.client.message.YouPartedChannelMessage; import com.tapchatapp.android.client.message.request.QuitMessage; import java.lang.reflect.Type; import java.util.Map; public class MessageDeserializer implements JsonDeserializer<Message> { private static final Map<String, Class<? extends Message>> TYPES = ImmutableMap .<String, Class<? extends Message>>builder().put(AwayMessage.TYPE, AwayMessage.class) .put(BacklogCompleteMessage.TYPE, BacklogCompleteMessage.class) .put(BannedMessage.TYPE, BannedMessage.class) .put(BufferArchivedMessage.TYPE, BufferArchivedMessage.class) .put(BufferMeMsgMessage.TYPE, BufferMeMsgMessage.class) .put(BufferMsgMessage.TYPE, BufferMsgMessage.class) .put(BufferUnarchivedMessage.TYPE, BufferUnarchivedMessage.class) .put(ChannelInitMessage.TYPE, ChannelInitMessage.class) .put(ChannelModeIsMessage.TYPE, ChannelModeIsMessage.class) .put(ChannelModeMessage.TYPE, ChannelModeMessage.class) .put(ChannelTimestampMessage.TYPE, ChannelTimestampMessage.class) .put(ChannelTopicMessage.TYPE, ChannelTopicMessage.class) .put(ChannelUrlMessage.TYPE, ChannelUrlMessage.class).put(ConnectedMessage.TYPE, ConnectedMessage.class) .put(ConnectingCancelledMessage.TYPE, ConnectingCancelledMessage.class) .put(ConnectingFailedMessage.TYPE, ConnectingFailedMessage.class) .put(ConnectingFinishedMessage.TYPE, ConnectingFinishedMessage.class) .put(ConnectingMessage.TYPE, ConnectingMessage.class) .put(ConnectingRetryMessage.TYPE, ConnectingRetryMessage.class) .put(ConnectionDeletedMessage.TYPE, ConnectionDeletedMessage.class) .put(EndOfBacklogMessage.TYPE, EndOfBacklogMessage.class).put(ErrorMessage.TYPE, ErrorMessage.class) .put(HeaderMessage.TYPE, HeaderMessage.class).put(HeartbeatEchoMessage.TYPE, HeartbeatEchoMessage.class) .put(IdleMessage.TYPE, IdleMessage.class).put(InvalidCertMessage.TYPE, InvalidCertMessage.class) .put(JoinedChannelMessage.TYPE, JoinedChannelMessage.class) .put(KickedChannelMessage.TYPE, KickedChannelMessage.class) .put(MakeBufferMessage.TYPE, MakeBufferMessage.class) .put(MakeServerMessage.TYPE, MakeServerMessage.class) .put(NickchangeMessage.TYPE, NickchangeMessage.class).put(NoticeMessage.TYPE, NoticeMessage.class) .put(OobIncludeMessage.TYPE, OobIncludeMessage.class) .put(OpenBufferMessage.TYPE, OpenBufferMessage.class) .put(PartedChannelMessage.TYPE, PartedChannelMessage.class).put(QuitMessage.TYPE, QuitMessage.class) .put(QuitServerMessage.TYPE, QuitServerMessage.class) .put(ServerDetailsChangedMessage.TYPE, ServerDetailsChangedMessage.class) .put(SocketClosedMessage.TYPE, SocketClosedMessage.class) .put(StatUserMessage.TYPE, StatUserMessage.class).put(SysMsgsMessage.TYPE, SysMsgsMessage.class) .put(UserAwayMessage.TYPE, UserAwayMessage.class).put(UserBackMessage.TYPE, UserBackMessage.class) .put(UserChannelModeMessage.TYPE, UserChannelModeMessage.class) .put(UserDetailsMessage.TYPE, UserDetailsMessage.class).put(UserModeMessage.TYPE, UserModeMessage.class) .put(WaitingToRetryMessage.TYPE, WaitingToRetryMessage.class) .put(YouJoinedChannelMessage.TYPE, YouJoinedChannelMessage.class) .put(YouNickchangeMessage.TYPE, YouNickchangeMessage.class) .put(YouPartedChannelMessage.TYPE, YouPartedChannelMessage.class).build(); private final boolean mDebug; public MessageDeserializer() { mDebug = TapchatApp.get().getPreferences().getBoolean(TapchatApp.PREF_DEBUG, false); } @Override public Message deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { if (mDebug) { Log.d("MessageDeserializer", "Got message: " + json.toString()); } JsonObject jsonObject = json.getAsJsonObject(); Class<? extends Message> klass; if (jsonObject.has("_reqid") && !jsonObject.get("_reqid").isJsonNull()) { klass = ResponseMessage.class; } else { JsonElement messageType = jsonObject.get("type"); if (messageType != null) { String type = messageType.getAsString(); klass = TYPES.get(type); if (klass == null) { klass = UnknownMessage.class; } } else { klass = UnknownMessage.class; } } return context.deserialize(json, klass); } }