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Posted to j-users@xerces.apache.org by Brad O'Hearne <ca...@megapathdsl.net> on 2001/02/15 03:53:27 UTC
NullPointerException trying to parse a simple XML file.
This should be a pretty simple question. Running the following code:
try {
XMLReader parser =
XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
parser.setContentHandler(contentHandler);
parser.setErrorHandler(errorHandler);
parser.setEntityResolver(new FeedEntityResolver(dtdPath));
parser.setFeature("http://xml.org/sax/features/validation", true);
try {
parser.parse(uri);
}
catch (IOException e) {
throw new FeedException("IOException, error reading URI: " +
e.getMessage(), e);
}
catch (SAXException e) {
e.printStackTrace();
throw new FeedException("Error in parsing: " + e.getMessage(), e);
}
}
catch (SAXException e) {
throw new FeedException("Unable to create parser.", e);
}
where
contentHandler is a valid ContentHandler
errorHandler is a valid ErrorHandler
FeedEntityResolver is a valid Entity Resolver
uri is a valid absolute filename.
I am having the following Exception thrown:
java.lang.NullPointerException
at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:878)
at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:900)
No methods on my ErrorHandler, ContentHandler, or EntityResolver are ever
getting called. Does anyone have any idea what I am missing? The problem
seems to be contained within the parser code....
Any help is greatly appreciated.
Brad
RE: Windows Paths
Posted by Brad O'Hearne <ca...@megapathdsl.net>.
I must still be missing something. Neither
parser.parse("c:/test/data.xml");
or
parser.parse("file://c:/test/data.xml");
are working. They are both causing a NullPointerException to be thrown,
same as the "c:\test\data.xml" string below.
Any other ideas, or have I missed something?
Brad
-----Original Message-----
From: Milind Gadre [mailto:milind@ecplatforms.com]
Sent: Monday, February 19, 2001 12:56 PM
To: xerces-j-user@xml.apache.org
Subject: Re: Windows Paths
Brad, use forward slashes ... c:/a/b/c
Regards...
Milind Gadre
ecPlatforms, Inc
901 Mariner's Island Blvd, Suite 565
San Mateo, CA 94404
C: 510-919-0596
F: 815-352-0779
milind@ecplatforms.com
>
> parser.parse("c:\test\data.xml");
>
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Re: Windows Paths
Posted by Milind Gadre <mi...@ecplatforms.com>.
Brad, use forward slashes ... c:/a/b/c
Regards...
Milind Gadre
ecPlatforms, Inc
901 Mariner's Island Blvd, Suite 565
San Mateo, CA 94404
C: 510-919-0596
F: 815-352-0779
milind@ecplatforms.com
>
> parser.parse("c:\test\data.xml");
>
Windows Paths
Posted by Brad O'Hearne <ca...@megapathdsl.net>.
Hello all...
I am trying to figure out what the proper format is to specify an absolute
path on a Windows platform as the URI for the parse method. If I have an
XMLReader called parser, the following:
parser.parse("c:\test\data.xml");
will not work. I am finding this same issue a bit of an problem when trying
to resolve the dtd in the EntityResolver as well, since the resolveEntity
method is receiving a systemId that includes path info, as in
file:///test/dtd/data.dtd. Specifically, on a Windows platform, how do you
include the drive letter in the URI?
Thanks in advance.
Brad
Re: NullPointerException trying to parse a simple XML file.
Posted by Elena Litani <hl...@jtcsv.com>.
Hi, Brad,
It is hard to say what is going on without any additional info. I
suspect you have some error in your code, cause I don't recall anybody
reporting this kind of behaviour before.
If you still need help, please, attach your .java files + sample file.
Thank you,
Elena
> Brad O'Hearne wrote:
>
> This should be a pretty simple question. Running the following code:
>
>
> try {
> XMLReader parser =
> XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
> parser.setContentHandler(contentHandler);
> parser.setErrorHandler(errorHandler);
> parser.setEntityResolver(new FeedEntityResolver(dtdPath));
> parser.setFeature("http://xml.org/sax/features/validation",
> true);
> try {
> parser.parse(uri);
> }
> catch (IOException e) {
> throw new FeedException("IOException, error reading URI: " +
> e.getMessage(), e);
> }
> catch (SAXException e) {
> e.printStackTrace();
> throw new FeedException("Error in parsing: " + e.getMessage(),
> e);
> }
> }
> catch (SAXException e) {
> throw new FeedException("Unable to create parser.", e);
> }
> where
> contentHandler is a valid ContentHandler
> errorHandler is a valid ErrorHandler
> FeedEntityResolver is a valid Entity Resolver
> uri is a valid absolute filename.
>
> I am having the following Exception thrown:
>
> java.lang.NullPointerException
> at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:878)
> at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:900)
>
> No methods on my ErrorHandler, ContentHandler, or EntityResolver are
> ever getting called. Does anyone have any idea what I am missing?
> The problem seems to be contained within the parser code....
>
> Any help is greatly appreciated.
>
> Brad
RE: NullPointerException trying to parse a simple XML file.
Posted by Brad O'Hearne <ca...@megapathdsl.net>.
One correction....the fatalError method on my ErrorHandler is getting
called....but there isn't much detail, just what is below...any ideas?
Brad
-----Original Message-----
From: Brad O'Hearne [mailto:cabodog@megapathdsl.net]
Sent: Wednesday, February 14, 2001 6:53 PM
To: xerces-j-user@xml.apache.org
Subject: NullPointerException trying to parse a simple XML file.
This should be a pretty simple question. Running the following code:
try {
XMLReader parser =
XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
parser.setContentHandler(contentHandler);
parser.setErrorHandler(errorHandler);
parser.setEntityResolver(new FeedEntityResolver(dtdPath));
parser.setFeature("http://xml.org/sax/features/validation", true);
try {
parser.parse(uri);
}
catch (IOException e) {
throw new FeedException("IOException, error reading URI: " +
e.getMessage(), e);
}
catch (SAXException e) {
e.printStackTrace();
throw new FeedException("Error in parsing: " + e.getMessage(), e);
}
}
catch (SAXException e) {
throw new FeedException("Unable to create parser.", e);
}
where
contentHandler is a valid ContentHandler
errorHandler is a valid ErrorHandler
FeedEntityResolver is a valid Entity Resolver
uri is a valid absolute filename.
I am having the following Exception thrown:
java.lang.NullPointerException
at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:878)
at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:900)
No methods on my ErrorHandler, ContentHandler, or EntityResolver are ever
getting called. Does anyone have any idea what I am missing? The problem
seems to be contained within the parser code....
Any help is greatly appreciated.
Brad