1 files changed, 157 insertions, 0 deletions
diff --git a/projects/net.wotonomy.foundation/src/main/java/net/wotonomy/foundation/NSForwardException.java b/projects/net.wotonomy.foundation/src/main/java/net/wotonomy/foundation/NSForwardException.java
new file mode 100644
index 0000000..1db0ad2
--- /dev/null
+++ b/projects/net.wotonomy.foundation/src/main/java/net/wotonomy/foundation/NSForwardException.java
@@ -0,0 +1,157 @@
+/*
+Wotonomy: OpenStep design patterns for pure Java applications.
+Copyright (C) 2000 Michael Powers
+
+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.foundation;
+
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+/**
+* Serves to wrap an exception inside of a RuntimeException,
+* which is not required to be declared in a throws statement.
+*
+* @author michael@mpowers.net
+* @author $Author: cgruber $
+* @version $Revision: 893 $
+*/
+
+public class NSForwardException extends RuntimeException
+{
+	protected String message;
+	protected Throwable wrappedThrowable;
+	
+	/**
+	* Default constructor.
+	*/ 
+	public NSForwardException()
+	{
+		super();
+		message = null;
+		wrappedThrowable = null;	
+	}
+	
+	/**
+	* Standard constructor with message.
+	*/
+	public NSForwardException( String aMessage )
+	{
+		super( aMessage );
+		message = aMessage;
+		wrappedThrowable = null;
+	}
+	
+	/**
+	* Specifies a throwable to wrap.
+	*/ 
+	public NSForwardException( Throwable aThrowable )
+	{
+		super();
+		message = null;
+		wrappedThrowable = aThrowable;
+	}
+	
+	/**
+	* Specifies a message and a throwable to wrap.
+	*/ 
+	public NSForwardException( Throwable aThrowable, String aMessage )
+	{
+		super( aMessage );
+		message = aMessage;
+		wrappedThrowable = aThrowable;
+	}
+    
+    /**
+    * Returns the wrapped throwable.
+    */
+    public Throwable originalException()
+    {
+        return wrappedThrowable;   
+    }
+	
+	public void printStackTrace(PrintWriter s)
+	{
+		if ( message != null )
+		{
+			s.println( toString() );	
+		}
+		if ( wrappedThrowable != null )
+		{
+			wrappedThrowable.printStackTrace( s );
+			return;
+		}
+		super.printStackTrace( s );
+	}
+	
+	public void printStackTrace(PrintStream s)
+	{
+		if ( message != null )
+		{
+			s.println( toString() );	
+		}
+		if ( wrappedThrowable != null )
+		{
+			wrappedThrowable.printStackTrace( s );	
+			return;
+		}
+		super.printStackTrace( s );
+	}
+	
+	public void printStackTrace()
+	{
+		if ( message != null )
+		{
+			System.err.println( toString() );	
+		}
+		if ( wrappedThrowable != null )
+		{
+			wrappedThrowable.printStackTrace();	
+			return;
+		}
+		super.printStackTrace();
+	}
+    
+    public String stackTrace()
+    {
+        StringWriter writer = new StringWriter();
+        PrintWriter printWriter = new PrintWriter( writer );
+		if ( wrappedThrowable != null )
+		{
+			wrappedThrowable.printStackTrace( printWriter );	
+		}
+        else
+        {
+    		super.printStackTrace( printWriter );
+        }
+        printWriter.flush();
+        printWriter.close();
+        return writer.toString();
+    }
+
+	public String toString()
+    {
+        String result = message;
+        if ( result == null ) result = "";
+		if ( wrappedThrowable != null )
+		{
+            result = wrappedThrowable.toString() + " : " + result;
+		}
+        return result;
+    }
+    
+}