4 * Copyright 2015 eddie.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 package uk.ac.ntu.n0521366.wsyd.libs.net;
26 import java.util.ArrayList;
32 public class NetworkMessageEventListenerManager implements NetworkMessageEventGenerator {
34 * Wrapper allowing filtering of NetworkMessageEvents based on message intent.
36 public class NetworkMessageEventListenerWithIntent {
38 NetworkMessageEventListener _listener;
40 public NetworkMessageEventListenerWithIntent(NetworkMessageEventListener listener, String intent) {
45 protected ArrayList<NetworkMessageEventListenerWithIntent> _NetworkMessageEventListeners;
48 * Construct an empty list of Event Listeners.
50 NetworkMessageEventListenerManager() {
51 _NetworkMessageEventListeners = new ArrayList<>();
55 * Add a NetworkMessageEvent listener.
57 * Listens to all intents.
62 public synchronized void addNetworkMessageEventListener(NetworkMessageEventListener listener) {
63 _NetworkMessageEventListeners.add(new NetworkMessageEventListenerWithIntent(listener, null));
67 * Add a filtered NetworkMessageEvent listener.
69 * Filters on the intent of the NetworkMessage.
72 * @param intent null to listen to all intents, otherwise the intent to listen for
75 public synchronized void addNetworkMessageEventListener(NetworkMessageEventListener listener, String intent) {
76 _NetworkMessageEventListeners.add(new NetworkMessageEventListenerWithIntent(listener, intent));
80 * Remove a NetworkMessageEvent listener.
85 public synchronized void removeNetworkMessageEventListener(NetworkMessageEventListener listener) {
86 for (NetworkMessageEventListenerWithIntent intentListener : _NetworkMessageEventListeners)
87 if (intentListener._listener == listener)
88 _NetworkMessageEventListeners.remove(intentListener);
92 * Send a NetworkMessageEvent to all listeners.
94 * Only sends the message to listeners registered for the same intent, or for all messages.
96 * @param message the NetworkMessage to send
99 public synchronized void fireNetworkMessageEvent(NetworkMessage message) {
100 NetworkMessageEvent event = new NetworkMessageEvent(this, message);
101 for (NetworkMessageEventListenerWithIntent intentListener : _NetworkMessageEventListeners) {
102 if (intentListener._intent.equals(message._intent) || intentListener._intent == null)
103 intentListener._listener.NetworkMessageReceived(event);