From f42a2065246b7cef6d307478e146cb59d563504c Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Fri, 16 May 2008 15:11:30 +0000
Subject: [PATCH] add property change events reorder properties

git-svn-id: http://trooper/svn/projects/jSite/trunk@897 c3eda9e8-030b-0410-8277-bc7414b0a119
---
 src/net/pterodactylus/jsite/core/Project.java | 137 +++++++++++++++++++++-----
 1 file changed, 114 insertions(+), 23 deletions(-)

diff --git a/src/net/pterodactylus/jsite/core/Project.java b/src/net/pterodactylus/jsite/core/Project.java
index cc53268..e57c298 100644
--- a/src/net/pterodactylus/jsite/core/Project.java
+++ b/src/net/pterodactylus/jsite/core/Project.java
@@ -19,29 +19,102 @@
 
 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;
+
+import net.pterodactylus.util.beans.Comparer;
+
 /**
- * Container for project information.
+ * Container for project information. A Project is capable of notifying
+ * {@link PropertyChangeListener}s if any of the contained properties change.
  * 
  * @author David ‘Bombe’ Roden &lt;bombe@freenetproject.org&gt;
  * @version $Id$
  */
 public class Project {
 
+	/** 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 “description” property. */
+	public static final String PROPERTY_DESCRIPTION = "description";
+
+	/** Name of the “public key” property. */
+	public static final String PROPERTY_PUBLIC_KEY = "publicKey";
+
+	/** Name of the “private key” property. */
+	public static final String PROPERTY_PRIVATE_KEY = "privateKey";
+
+	/** Name of the “local path” property. */
+	public static final String PROPERTY_LOCAL_PATH = "localPath";
+
 	/** The name of the project. */
 	private String name;
 
 	/** The description of the project. */
 	private String description;
 
-	/** The local path of the project. */
-	private String localPath;
-
 	/** The public key. */
 	private String publicKey;
 
 	/** The private key. */
 	private String privateKey;
 
+	/** The local path of the project. */
+	private String localPath;
+
+	//
+	// 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 name of the project.
 	 * 
@@ -58,7 +131,11 @@ public class Project {
 	 *            The name of the project
 	 */
 	public void setName(String name) {
+		String oldName = this.name;
 		this.name = name;
+		if (!Comparer.equal(oldName, name)) {
+			firePropertyChange(PROPERTY_NAME, oldName, name);
+		}
 	}
 
 	/**
@@ -77,26 +154,11 @@ public class Project {
 	 *            The description of the project
 	 */
 	public void setDescription(String description) {
+		String oldDescription = this.description;
 		this.description = description;
-	}
-
-	/**
-	 * Returns the local path of the project.
-	 * 
-	 * @return The local path of the project
-	 */
-	public String getLocalPath() {
-		return localPath;
-	}
-
-	/**
-	 * Sets the local path of the project.
-	 * 
-	 * @param localPath
-	 *            The local path of the project
-	 */
-	public void setLocalPath(String localPath) {
-		this.localPath = localPath;
+		if (!Comparer.equal(oldDescription, description)) {
+			firePropertyChange(PROPERTY_DESCRIPTION, oldDescription, description);
+		}
 	}
 
 	/**
@@ -115,7 +177,11 @@ public class Project {
 	 *            The public key of the project
 	 */
 	public void setPublicKey(String publicKey) {
+		String oldPublicKey = this.publicKey;
 		this.publicKey = publicKey;
+		if (!Comparer.equal(oldPublicKey, publicKey)) {
+			firePropertyChange(PROPERTY_PUBLIC_KEY, oldPublicKey, publicKey);
+		}
 	}
 
 	/**
@@ -134,7 +200,32 @@ public class Project {
 	 *            The private key of the project
 	 */
 	public void setPrivateKey(String privateKey) {
+		String oldPrivateKey = this.privateKey;
 		this.privateKey = privateKey;
+		if (!Comparer.equal(oldPrivateKey, privateKey)) {
+			firePropertyChange(PROPERTY_PRIVATE_KEY, oldPrivateKey, privateKey);
+		}
+	}
+
+	/**
+	 * Returns the local path of the project.
+	 * 
+	 * @return The local path of the project
+	 */
+	public String getLocalPath() {
+		return localPath;
+	}
+
+	/**
+	 * Sets the local path of the project.
+	 * 
+	 * @param localPath
+	 *            The local path of the project
+	 */
+	public void setLocalPath(String localPath) {
+		String oldLocalPath = this.localPath;
+		this.localPath = localPath;
+		firePropertyChange(PROPERTY_LOCAL_PATH, oldLocalPath, localPath);
 	}
 
 }
-- 
2.7.4