Jaxp parsing problem

[f. taioli]

Hi,
I'm using jaxp for parsing and validating (xml schema) a xml file.

This is what I do...
==================================

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
dbf.setValidating( true );
try{
dbf.setAttribute(JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA);
} catch (Exception e) {
e.printStackTrace(System.err);
}

DocumentBuilder db = dbf.newDocumentBuilder();
OutputStreamWriter errorWriter =
new OutputStreamWriter(System.err, outputEncoding);

db.setErrorHandler(
new SimpleErrorHandler(
new PrintWriter(errorWriter, true)
)
);

try{

Document document =
db.parse( new File( "src/xml/sudoku01.xml" ));
}
catch( SAXException se ){
System.err.println(se.getMessage());
}

==================================

All works right, the xml file is loaded, parsed and validated right.

But now I need to parse an InputStream, not directly a File object.
But if I simply change the File object with a stream the parser stop validating telling me that the xml file don't have good elements.

Change applied to precedent code....
==================================
try{
InputStream ist = new FileInputStream(
new File("src/xml/sudoku01.xml")
);

Document document =
db.parse( ist );

}
==================================


Where is my fault in using InputStream rather than directly a File object?

Hope anyone can help me
[ June 03, 2008: Message edited by: f. taioli ]

[Ben Souther]

"fbn tla",
Please check your private messages regarding an important administrative matter.
-Ben

[Paul Clapham]

Perhaps your XML document has a relative URI saying where its schema is located. In this case the parser knows where a File is located so it can find the schema relative to the file. But the parser doesn't know where an InputStream got its data from so it can't find the schema relative to that.

[f. taioli]

Originally posted by Paul Clapham:
Perhaps your XML document has a relative URI saying where its schema is located. In this case the parser knows where a File is located so it can find the schema relative to the file. But the parser doesn't know where an InputStream got its data from so it can't find the schema relative to that.

Thank you for your reply but my xml documet hav an absolute url for the schema... I think.

This is my xml file intestation (http://twi.loc is a working local web server )

<?xml version="1.0" encoding="UTF-8"?>
<sudoku xmlns="http://twi.loc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://twi.loc sudoku.xsd"
sid="473" >

[Paul Clapham]

"sudoku.xsd" certainly looks like a relative URI to me. I don't know much about schemas but when I read the XML Schema recommendation, it looks to me like

xsi:schemaLocation="http://twi.loc sudoku.xsd"

means "You can find the schema definition for namespace http://twi.loc at the URI sudoku.xsd". And if this is the case, http://twi.loc isn't where the parser will look for the schema definition. The parser will look for it in sudoku.xsd.

In general a namespace URI is just a name. It doesn't have to be the URL of an actual page on the web. I don't think XML Schema changes that in any way.
[ June 07, 2008: Message edited by: Paul Clapham ]

[f. taioli]

Opss... you are right thank you very mutch