com.glaf.wechat.sdk.message.handler.AbstractMessageHandler.java Source code

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Here is the source code for com.glaf.wechat.sdk.message.handler.AbstractMessageHandler.java

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/*
 * 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.glaf.wechat.sdk.message.handler;

import java.util.Date;
import java.util.List;

import org.dom4j.Element;

import com.glaf.core.config.Configuration;
import com.glaf.wechat.config.WechatConfiguration;
import com.glaf.wechat.sdk.message.IMessage;
import com.glaf.wechat.sdk.message.ItemArticle;
import com.glaf.wechat.sdk.message.ItemMusic;
import com.glaf.wechat.sdk.message.Message;
import com.glaf.wechat.sdk.message.ResponseMusicMessage;
import com.glaf.wechat.sdk.message.ResponseNewsMessage;
import com.glaf.wechat.sdk.message.ResponseTextMessage;

/**
 * abstract class for message handling
 * 
 */
public abstract class AbstractMessageHandler implements IMessageHandler, IMessage {

    protected static Configuration conf = WechatConfiguration.create();

    protected Message message;

    // build response music message
    protected Message buildResponseMusicMessage(ItemMusic item) {
        ResponseMusicMessage msg = new ResponseMusicMessage();
        msg.setMsgType(MESSAGE_RESPONSE_MUSIC);
        msg.setCreateTime(getCurrentUnixTimestamp());
        msg.setFromUserName(message.getToUserName());
        msg.setToUserName(message.getFromUserName());
        msg.setMusic(item);
        msg.setFuncFlag(1);
        return msg;
    }

    // build response news message
    protected Message buildResponseNewsMessage(List<ItemArticle> items) {
        ResponseNewsMessage msg = new ResponseNewsMessage();
        msg.setMsgType(MESSAGE_RESPONSE_NEWS);
        msg.setCreateTime(getCurrentUnixTimestamp());
        msg.setFromUserName(message.getToUserName());
        msg.setToUserName(message.getFromUserName());
        msg.setArticleItems(items);
        msg.setCount(items.size());
        msg.setFuncFlag(1);
        return msg;
    }

    // build response text message
    protected Message buildResponseTextMessage(String content) {
        ResponseTextMessage msg = new ResponseTextMessage();
        msg.setMsgType(MESSAGE_RESPONSE_TEXT);
        msg.setContent(content);
        msg.setFromUserName(message.getToUserName());
        msg.setToUserName(message.getFromUserName());
        msg.setFuncFlag(1);
        msg.setCreateTime(getCurrentUnixTimestamp());
        return msg;
    }

    // get current Unix time
    public long getCurrentUnixTimestamp() {
        Date date = new Date();
        return (long) (date.getTime() / 1000);
    }

    @Override
    public Message handleMessage(Message message) {
        this.message = message;
        return handleSpecialMessage(message);
    }

    protected abstract Message handleSpecialMessage(Message message);

    // put common parse part here!
    @Override
    public void parseMessage(Message message, Element root) {
        message.setMsgType(root.elementText(TAG_MSGTYPE));
        message.setFromUserName(root.elementText(TAG_FROMUSERNAME));
        message.setToUserName(root.elementText(TAG_TOUSERNAME));

        parseSpecialMessage(message, root);
    }

    // subclass implements it
    protected abstract void parseSpecialMessage(Message message, Element root);

}