From aedc34d55462a75e329bbf342251ff6504cd117e Mon Sep 17 00:00:00 2001
From: Benjamin Culkin <scorpress@gmail.com>
Date: Sun, 19 May 2024 17:56:33 -0400
Subject: Initial import from SVN

---
 .../java/net/wotonomy/control/EOObserverProxy.java | 104 +++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EOObserverProxy.java

(limited to 'projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EOObserverProxy.java')

diff --git a/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EOObserverProxy.java b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EOObserverProxy.java
new file mode 100644
index 0000000..e616a33
--- /dev/null
+++ b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EOObserverProxy.java
@@ -0,0 +1,104 @@
+/*
+Wotonomy: OpenStep design patterns for pure Java applications.
+Copyright (C) 2001 Intersect Software Corporation
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, see http://www.gnu.org
+*/
+
+package net.wotonomy.control;
+
+import net.wotonomy.foundation.NSSelector;
+
+/**
+* A convenience observer for objects that do not or cannot 
+* subclass EODelayedObserver.  EOObserverProxy will invoke
+* an NSSelector on an object when it receives a subjectChanged
+* message.
+*
+* @author michael@mpowers.net
+* @author $Author: cgruber $
+* @version $Revision: 893 $
+*/
+public class EOObserverProxy
+    extends EODelayedObserver
+{
+    protected Object target;
+    protected NSSelector selector;
+    protected int priority;
+    
+ 	/**
+	* Constructs an EODelayedObserver that will invoke the specified selector
+    * on the specified object, and will run at the specified priority.
+	*/
+	public EOObserverProxy ( 
+        Object anObject, NSSelector aSelector, int aPriority )
+    {
+        target = anObject;
+        selector = aSelector;
+        priority = aPriority;
+    }
+
+ 	/**
+	* Constructs an EODelayedObserver that will invoke the specified selector
+    * on the specified object, and will run at ObserverPriorityThird priority,
+    * which is the default.
+	*/
+	public EOObserverProxy ( 
+        Object anObject, NSSelector aSelector )
+    {
+        this( anObject, aSelector, ObserverPriorityThird );
+    }
+
+    /**
+    * Returns the priority of this observer in the queue.
+	* This implementation returns the priority specified
+    * in the constructor.
+    */
+    public int priority ()
+    {
+        return priority;
+    }
+
+    /**
+    * Notifies observer that one or more objects that
+    * it is observing have changed.  The observer should
+    * check all objects it is observing for changes.
+    */
+    public void subjectChanged ()
+    {
+        try
+        {
+            selector.invoke( target );
+        }
+        catch ( Exception exc )
+        {
+            System.out.println( "Error notifying observer: " );
+            exc.printStackTrace();
+        }
+    }
+    
+}
+
+/*
+ * $Log$
+ * Revision 1.1  2006/02/16 13:19:57  cgruber
+ * Check in all sources in eclipse-friendly maven-enabled packages.
+ *
+ * Revision 1.1  2001/10/22 21:55:32  mpowers
+ * This turns out to be a really useful class.
+ *
+ *
+ */
+    
+
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