It was worth a try but all three conditions are true. Actually I used a
FileDialog with LOAD option to grab the file name for an existing XML
file. So the problem is not with the file itself unless I am not
understanding something about the parse method.
Here is another possibility. The actual statement that gets the
NullPointerException is the following:
throw new SAXParseException (
e.getMessage () != null
? e.getMessage ()
: e.getClass ().getName (),
locator.getPublicId (), locator.getSystemId (),
locator.getLineNumber (), locator.getColumnNumber (),
e);
Since the error is on the line "throw new SAXParseException" that would
say that this operation got the NullPointerException? That seems a bit
odd as it is part of the standard package org.apache.crimson.parser.
Ray
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of A. Kevin Baynes
Sent: Thursday, April 07, 2005 11:47 AM
To: Research Triangle Java User's Group mailing list.
Subject: Re: [Juglist] SAX Parse Exception
'Filerules' will not be null, because it is newly created, but that
doesn't mean that the file exists or that it is readable, etc.
Possibly try checking Filerules.exists(), Filerules.isFile(),
Filerules.canRead() ?
On Apr 6, 2005 6:58 PM, Raymond Hooker (rhooker) <[EMAIL PROTECTED]>
wrote:
Pardon the basic question but I cannot see what the problem is. I was
going through the SAX tutorials using Eclipse 3.0.2 and Java SDK
1.4.2_07. Anyhow the following code gets throws
java.lang.NullPointerException:
String rulesFile =
fileDialog.getDirectory()+fileDialog.getFile();
// Use an instance of ourselves as the SAX event handler
DefaultHandler handler = new Echo();
// Use the default (non-validating) parser
SAXParserFactory factory =
SAXParserFactory.newInstance();
try {
// Set up output stream
out = new OutputStreamWriter(System.out, "UTF8");
// Parse the input
File Filerules = new File(rulesFile);
SAXParser saxParser = factory.newSAXParser();
saxParser.parse( Filerules, handler );
<----Exception occurs here
} catch (Throwable t) {
t.printStackTrace();
}
I verified that by a breakpoint that the time of exception Filerules
was File object that is not null, and handler is a Echo instance.
Echo is class that extends DefaultHandler. Echo has a number of
methods to handle events like startDocument and startElement.
According to the JavaDoc, I don't believe that the parse method is
supposed to throw a nullPointerException. BTW the actual stack trace
is:
java.lang.NullPointerException
at
org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:691)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
at
org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:281)
at Tree.rulesTree.main(rulesTree.java:103)
I have tried various file contents.
Ray
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~akb
_________________
A. Kevin Baynes
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