Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.oic.event.map; import com.oic.client.OicCharacter; import com.oic.event.ActionEventImpl; import com.oic.map.MapFactory; import com.oic.map.OicMap; import com.oic.net.WebSocketListener; import com.oic.utils.Validators; import java.util.Collection; import org.json.simple.JSONArray; import org.json.simple.JSONObject; /** * * @author kxhtj529 */ public class GetMapUserList implements ActionEventImpl { @Override public void ActionEvent(JSONObject json, WebSocketListener webSocket) { JSONObject responseJSON = new JSONObject(); responseJSON.put("method", "getmapuserlist"); if (!validation(json)) { responseJSON.put("status", 1); webSocket.sendJson(responseJSON); return; } int mapid = Integer.parseInt(json.get("mapid").toString()); MapFactory factory = MapFactory.getInstance(); OicMap map = factory.getMap(mapid); JSONArray charactersJSON = new JSONArray(); try { for (Long userid : map.getUserIdList()) { charactersJSON.add(userid); } } catch (NullPointerException ex) { } responseJSON.put("userlist", charactersJSON); webSocket.sendJson(responseJSON); } private boolean validation(JSONObject json) { Validators v = new Validators(json); v.add("mapid", v.integerType()); return v.validate(); } }