Added an alternative constructor to PGSQLException so that debugging

          some more osteric bugs is easier. If only 1 arg is supplied and it's
          of type Exception, then that Exception's stacktrace is now included.

This was done as there's been a report of an unusual bug during connection.
This will make this sort of bug hunting easier from now on.

src/interfaces/jdbc/CHANGELOG

+Thu Jan 25 09:11:00 GMT 2001 peter@retep.org.uk
+        - Added an alternative constructor to PGSQLException so that debugging
+          some more osteric bugs is easier. If only 1 arg is supplied and it's
+          of type Exception, then that Exception's stacktrace is now included.
+
 Wed Jan 24 09:18:00 GMT 2001 peter@retep.org.uk
 	- Removed the 8k limit by setting it to 64k
 

src/interfaces/jdbc/org/postgresql/util/PSQLException.java

 package org.postgresql.util;
 
+import java.io.*;
 import java.sql.*;
 import java.text.*;
 import java.util.*;
@@ -45,6 +46,34 @@ public class PSQLException extends SQLException
 	translate(error,argv);
     }
 
+    /**
+     * Helper version for 1 arg. This is used for debug purposes only with
+     * some unusual Exception's. It allows the originiating Exceptions stack
+     * trace to be returned.
+     */
+    public PSQLException(String error,Exception ex)
+    {
+	super();
+
+        Object[] argv = new Object[1];
+
+        try {
+          ByteArrayOutputStream baos = new  ByteArrayOutputStream();
+          PrintWriter pw = new PrintWriter(baos);
+          pw.println("Exception: "+ex.toString()+"\nStack Trace:\n");
+          ex.printStackTrace(pw);
+          pw.println("End of Stack Trace");
+          pw.flush();
+	  argv[0] = baos.toString();
+          pw.close();
+          baos.close();
+        } catch(Exception ioe) {
+          argv[0] = ex.toString()+"\nIO Error on stack trace generation! "+ioe.toString();
+        }
+
+	translate(error,argv);
+    }
+
     /**
      * Helper version for 2 args
      */