com.akanoo.client.dto.MessageCreator.java Source code

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Here is the source code for com.akanoo.client.dto.MessageCreator.java

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/* Copyright 2012 Fabian Gebert and Michael Gorski.
 *
 * 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.akanoo.client.dto;

import java.util.HashMap;
import java.util.Map;

import name.pehl.piriti.json.client.JsonInstanceCreator;
import name.pehl.piriti.json.client.JsonReader;

import com.akanoo.client.dto.AccountInfo.AccountInfoReader;
import com.akanoo.client.dto.CanvasInfo.CanvasInfoReader;
import com.akanoo.client.dto.NoteInfo.NoteInfoReader;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;
import com.google.inject.Inject;

public class MessageCreator extends JsonInstanceCreator<Message> {

    @Inject
    private static AccountInfoReader accountInfoReader;

    @Inject
    private static NoteInfoReader noteInfoReader;

    @Inject
    private static CanvasInfoReader canvasInfoReader;

    private Map<MessageConstants, JsonReader<? extends Sendable>> readerMap;

    public MessageCreator() {
        readerMap = new HashMap<MessageConstants, JsonReader<? extends Sendable>>();

        // message and reader for reply
        readerMap.put(MessageConstants.initialize, accountInfoReader);
        readerMap.put(MessageConstants.loadfriends, accountInfoReader);
        readerMap.put(MessageConstants.createnote, noteInfoReader);
        readerMap.put(MessageConstants.focusnote, noteInfoReader);
        readerMap.put(MessageConstants.movenote, noteInfoReader);
        readerMap.put(MessageConstants.updatenote, noteInfoReader);
        readerMap.put(MessageConstants.removenote, noteInfoReader);
        readerMap.put(MessageConstants.loadshares, canvasInfoReader);
        readerMap.put(MessageConstants.loadactiveusers, canvasInfoReader);
        readerMap.put(MessageConstants.loadcanvas, canvasInfoReader);
        readerMap.put(MessageConstants.createcanvas, canvasInfoReader);
        readerMap.put(MessageConstants.renamecanvas, canvasInfoReader);
    }

    @Override
    public Message newInstance(JSONValue context) {
        Message message = null;
        JSONObject jsonObject = context.isObject();
        if (jsonObject != null) {
            JSONValue codeValue = jsonObject.get("code");
            JSONValue bodyValue = jsonObject.get("body");
            if (codeValue != null && bodyValue != null) {
                JSONString codeJSONString = codeValue.isString();
                JSONObject bodyJSONValue = bodyValue.isObject();
                if (codeJSONString != null && bodyJSONValue != null) {
                    String codeString = codeJSONString.stringValue();

                    MessageConstants messageConstants = MessageConstants.fromString(codeString);

                    if (messageConstants != null) {
                        // initialize message
                        message = new Message();
                        message.code = codeString;

                        JsonReader<? extends Sendable> reader = readerMap.get(messageConstants);
                        message.body = reader.read(bodyJSONValue);
                    }
                }
            }
        }
        return message;
    }

}