JspC null pointer exception

[Dave Gibbs <dg...@agency.com>]

Hi guys,
I'm trying to use the ant task JspC which relies on jasper.
The ant task JspC is giving me null pointer exceptions and I have been able
to reproduce them on the command line as follows.

2002-06-25 11:56:12 - ERROR-the file '\admin\clear.jsp' generated the
following
general exception: java.lang.NullPointerException
java.lang.NullPointerException
        at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:97)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:57)
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:153)
        at org.apache.jasper.JspC.parseFile(JspC.java:427)
        at org.apache.jasper.JspC.parseFiles(JspC.java:747)
        at org.apache.jasper.JspC.main(JspC.java:762)

The command I am running is as run by the ant JspC task. I'll include it
below. I'm not sure why the null pointer exception occurs apparantly when
trying to create the output file.
The following code from the head revision of Compiler.java suggests to me
the the JSPCompilationContext is not correctly initialised by my command. I
still get the error when I pass in the class name using -c argument to JspC

   /**
     * Compile the jsp file from the current engine context
     */
    public void generateJava()
        throws FileNotFoundException, JasperException, Exception
    {
	// Setup page info area
	pageInfo = new PageInfo(new BeanRepository(ctxt.getClassLoader()));

        String javaFileName = ctxt.getServletJavaFileName();

        // Setup the ServletWriter
	// We try UTF8 by default. If it fails, we use the java encoding
	// specified for JspServlet init parameter "javaEncoding".

	String javaEncoding = "UTF8";
	OutputStreamWriter osw = null;
	try {
	    osw = new OutputStreamWriter(new FileOutputStream(javaFileName),
					 javaEncoding);
      ..........

Example command follows. "..." to shorten cp for readable example.

D:\jdk1.3.1_03\jre\bin\java.exe
-classpath
"C:\...\lib\servlet.jar;C:\...\lib\ant.jar;C:\...\lib\jasper-compiler.jar;C:
\...\lib\jasper-runtime.jar;C:\...\lib\xmlParserAPIs.jar;C:\...\lib\xercesIm
pl.jar;C:\...\lib\j2ee.jar;C:\...\lib\log4j-1.2.jar;C:\...\lib\db2java.zip;C
:\...\lib\log4j-1.2.jar;.C:\...\lib\various.jar;"
org.apache.jasper.JspC
-d "C:\...\build\generated"
-p com.fu.bar.jsp
-v9
-uriroot "C:\...\source\site"
-uribase "C:\...\source\site"
-die9
"C:\...\source\site\admin\error.jsp"

also tried above command with "-c error" and "-c error.class" before the jsp
file name.

The platform is W2K.

I hope that some-one experienced with jasper or ant jspc can help me with
this. I'd appreciate it.

Dave


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