X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fnet%2Fpterodactylus%2Fjsite%2Fcore%2FNode.java;h=7751225fd167b75a48da6cdfaa8311ca8931c6e1;hb=46468a98b62f04438ff5e456b199c77e00da4c44;hp=468a256d0b0c08808dd56497a121046115fbe434;hpb=47d63e2ca99951d9a4bcd5cf54017b2a06a9137c;p=jSite2.git

diff --git a/src/net/pterodactylus/jsite/core/Node.java b/src/net/pterodactylus/jsite/core/Node.java
index 468a256..7751225 100644
--- a/src/net/pterodactylus/jsite/core/Node.java
+++ b/src/net/pterodactylus/jsite/core/Node.java
@@ -19,14 +19,33 @@
 
 package net.pterodactylus.jsite.core;
 
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
 /**
- * Container for a Freenet node.
- *
+ * Container for a Freenet node. A Node is capable of notifying
+ * {@link PropertyChangeListener}s if any of the contained properties change.
+ * 
  * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
  * @version $Id$
  */
 public class Node {
 
+	/** Property change listeners. */
+	private final List<PropertyChangeListener> propertyChangeListeners = Collections.synchronizedList(new ArrayList<PropertyChangeListener>());
+
+	/** Name of the “name” property. */
+	public static final String PROPERTY_NAME = "name";
+
+	/** Name of the “hostname” property. */
+	public static final String PROPERTY_HOSTNAME = "hostname";
+
+	/** Name of the “port” property. */
+	public static final String PROPERTY_PORT = "port";
+
 	/** The name of the node. */
 	private String name;
 
@@ -36,9 +55,55 @@ public class Node {
 	/** The port number of the node. */
 	private int port;
 
+	//
+	// EVENT MANAGEMENT
+	//
+
+	/**
+	 * Adds a property change listener.
+	 * 
+	 * @param propertyChangeListener
+	 *            The property change listener to add
+	 */
+	public void addPropertyChangeListener(PropertyChangeListener propertyChangeListener) {
+		propertyChangeListeners.add(propertyChangeListener);
+	}
+
+	/**
+	 * Removes a property change listener.
+	 * 
+	 * @param propertyChangeListener
+	 *            The property change listener to remove
+	 */
+	public void removePropertyChangeListener(PropertyChangeListener propertyChangeListener) {
+		propertyChangeListeners.remove(propertyChangeListener);
+	}
+
+	/**
+	 * Notifies all listeners that a property has changed.
+	 * 
+	 * @param property
+	 *            The name of the property
+	 * @param oldValue
+	 *            The old value of the property
+	 * @param newValue
+	 *            The new value of the property
+	 */
+	private void firePropertyChange(String property, Object oldValue, Object newValue) {
+		PropertyChangeEvent propertyChangeEvent = new PropertyChangeEvent(this, property, oldValue, newValue);
+		for (PropertyChangeListener propertyChangeListener: propertyChangeListeners) {
+			propertyChangeListener.propertyChange(propertyChangeEvent);
+		}
+
+	}
+
+	//
+	// ACCESSORS
+	//
+
 	/**
 	 * Returns the user-given name of the node.
-	 *
+	 * 
 	 * @return The name of the node
 	 */
 	public String getName() {
@@ -47,17 +112,21 @@ public class Node {
 
 	/**
 	 * Sets the user-given name of the node.
-	 *
+	 * 
 	 * @param name
 	 *            The name of the node
 	 */
 	public void setName(String name) {
+		String oldName = this.name;
 		this.name = name;
+		if (((oldName != null) && (name == null)) || ((oldName == null) && (name != null)) || ((name != null) && !name.equals(oldName))) {
+			firePropertyChange(PROPERTY_NAME, oldName, name);
+		}
 	}
 
 	/**
 	 * Returns the hostname of the node.
-	 *
+	 * 
 	 * @return The hostname of the node
 	 */
 	public String getHostname() {
@@ -66,17 +135,21 @@ public class Node {
 
 	/**
 	 * Sets the hostname of the node.
-	 *
+	 * 
 	 * @param hostname
 	 *            The hostname of the node
 	 */
 	public void setHostname(String hostname) {
+		String oldHostname = this.hostname;
 		this.hostname = hostname;
+		if (((oldHostname != null) && (hostname == null)) || ((oldHostname == null) && (hostname != null)) || ((hostname != null) && !hostname.equals(oldHostname))) {
+			firePropertyChange(PROPERTY_HOSTNAME, oldHostname, hostname);
+		}
 	}
 
 	/**
 	 * Returns the port number of the node.
-	 *
+	 * 
 	 * @return The port number of the node
 	 */
 	public int getPort() {
@@ -85,12 +158,16 @@ public class Node {
 
 	/**
 	 * Sets the port number of the node.
-	 *
+	 * 
 	 * @param port
 	 *            The port number of the node
 	 */
 	public void setPort(int port) {
+		int oldPort = this.port;
 		this.port = port;
+		if (oldPort != port) {
+			firePropertyChange(PROPERTY_PORT, oldPort, port);
+		}
 	}
 
 	/**