+/*
+ * The MIT License
+ *
+ * Copyright 2015 eddie.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package uk.ac.ntu.n0521366.wsyd.libs.net;
+
+import java.util.ArrayList;
+
+/**
+ *
+ * @author eddie
+ */
+public class NetworkMessageEventListenerManager implements NetworkMessageEventGenerator {
+ /**
+ * Wrapper allowing filtering of NetworkMessageEvents based on message intent.
+ */
+ public class NetworkMessageEventListenerWithIntent {
+ String _intent;
+ NetworkMessageEventListener _listener;
+
+ public NetworkMessageEventListenerWithIntent(NetworkMessageEventListener listener, String intent) {
+ _intent = intent;
+ _listener = listener;
+ }
+ }
+ protected ArrayList<NetworkMessageEventListenerWithIntent> _NetworkMessageEventListeners;
+
+ /**
+ * Construct an empty list of Event Listeners.
+ */
+ NetworkMessageEventListenerManager() {
+ _NetworkMessageEventListeners = new ArrayList<>();
+ }
+
+ /**
+ * Add a NetworkMessageEvent listener.
+ *
+ * Listens to all intents.
+ *
+ * @param listener
+ */
+ @Override
+ public synchronized void addNetworkMessageEventListener(NetworkMessageEventListener listener) {
+ _NetworkMessageEventListeners.add(new NetworkMessageEventListenerWithIntent(listener, null));
+ }
+
+ /**
+ * Add a filtered NetworkMessageEvent listener.
+ *
+ * Filters on the intent of the NetworkMessage.
+ *
+ * @param listener
+ * @param intent null to listen to all intents, otherwise the intent to listen for
+ */
+ @Override
+ public synchronized void addNetworkMessageEventListener(NetworkMessageEventListener listener, String intent) {
+ _NetworkMessageEventListeners.add(new NetworkMessageEventListenerWithIntent(listener, intent));
+ }
+
+ /**
+ * Remove a NetworkMessageEvent listener.
+ *
+ * @param listener
+ */
+ @Override
+ public synchronized void removeNetworkMessageEventListener(NetworkMessageEventListener listener) {
+ for (NetworkMessageEventListenerWithIntent intentListener : _NetworkMessageEventListeners)
+ if (intentListener._listener == listener)
+ _NetworkMessageEventListeners.remove(intentListener);
+ }
+
+ /**
+ * Send a NetworkMessageEvent to all listeners.
+ *
+ * Only sends the message to listeners registered for the same intent, or for all messages.
+ *
+ * @param message the NetworkMessage to send
+ */
+ @Override
+ public synchronized void fireNetworkMessageEvent(NetworkMessage message) {
+ NetworkMessageEvent event = new NetworkMessageEvent(this, message);
+ for (NetworkMessageEventListenerWithIntent intentListener : _NetworkMessageEventListeners) {
+ if (intentListener._intent.equals(message._intent) || intentListener._intent == null)
+ intentListener._listener.NetworkMessageReceived(event);
+ }
+ }
+}