[Configuration] autoSave causing FileNotFoundException

[Mark Roth]

I believe I've found a bug.  When trying to use autoSave, 
jakarta-commons-configuration gives me the following error:

-----
java.io.FileNotFoundException: file:/tmp/test.xml (No such file or 
directory)
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
	at 
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:259)
	at 
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:216)
	at 
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:200)
	at 
org.apache.commons.configuration.XMLConfiguration.possiblySave(XMLConfiguration.java:566)
	at 
org.apache.commons.configuration.XMLConfiguration.clearProperty(XMLConfiguration.java:489)
	at 
org.apache.commons.configuration.AbstractConfiguration.setProperty(AbstractConfiguration.java:318)
	at 
org.apache.commons.configuration.XMLConfiguration.setProperty(XMLConfiguration.java:371)
	at test.Main.main(Main.java:22)
-----

For some reason, it converted my File into a URL but then tries to 
access it as a File path again when trying to persist my settings.

Here is a simple test application to reproduce the problem:
-----
package test;
import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import org.apache.commons.configuration.XMLConfiguration;
/**
 * Illustrates a bug in jakarta-commons-configuration
 *
 * @author Mark Roth
 */
public class Main {
    public static void main(String[] args)
        throws Exception
    {
        File configFile = new File("/tmp/test.xml");
        createSampleTestXml(configFile);
        XMLConfiguration config = new XMLConfiguration(configFile);
        config.setAutoSave(true);
        config.setProperty("a", "b");
    }
    private static void createSampleTestXml(File f)
        throws Exception
    {
        PrintWriter out = new PrintWriter(new FileWriter(f));
        out.println("<root>");
        out.println("  test");
        out.println("</root>");
        out.close();
    }
}
-----
Is this a known error?  Any known workarounds?
Thanks,
---
Mark Roth, Staff Engineer, Java Software
JSP 2.0 / 2.1 Specification Lead
Java Enterprise Community Leader
http://community.java.net/java-enterprise
Sun Microsystems, Inc.
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