Re: Validate With Schema in CLASSPATH

[Michael MacFadden]

Hi,
You are correct, I should be using the noNamespaceSchemaLocation.  I 
switched to that, but I am getting the same error.  I read the link that 
you sent over.  All of that makes sense except that the schema I am 
loading is not coming from a web url.  It is a local file that is in the 
classpath.  The relative path from the classpath root is the only way to 
locate the schema file..which is what I seem to be having difficulties 
with.  Thanks.

~Mike
Michael Glavassevich wrote:
Hi Michael,
The external schema location properties have the same definitions as the 
ones defined in the schema spec [1]. The value of schemaLocation is a list 
of pairs of URIs, where the first of each pair is a target namespace and 
the second of each pair is a schema location hint.  You've only specified 
a location. Does your schema have a target namespace? If it doesn't have 
one you should be using the noNamespaceSchemaLocation property instead.

[1] http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#schema-loc
Michael MacFadden <[EMAIL PROTECTED]> wrote on 01/04/2005 01:09:39 
PM:

 

All,
I have a question about schema validation.  I have a feeling that this 
is something that gets asked a lot but, I haven't been able to find the 
exact use case that I need help with.

Basically, the project I am working on uses xml to store project data 
that get generated by our tool.  I have created a schema to validate 
this project xml file.  The schema is going to be shipped with the 
product and will be in the CLASSPATH (possibly in a jar file).  I am 
wondering how I can tell the parser to use the schema file to validate 
the project file.  I would rather not have to specify the schema in the 
xml of the project file, because then some one could remove the schema 
declaration.  So basically, I want to configure the parser to use a 
schema that is in the CLASSPATH.

From the java code, the only way I can reference the schema file is 
something like "/org/foo/schema/project.xsd".  This is because I don't 
know the absolute path of the file I just know that it is in the 
classpath.  I have tried to use the ClassLoader's getResource() method 
to get the URL of the xsd file, but it still doesn't seem top be 
working.  Can some one point me to an example of how to do this. 

Here is what I have that isn't working.
try
{
       ClassLoader cl = ConnectionFileParser.class.getClassLoader();
       URL url = cl.getResource( CONN_SCHEMA_FILE );
       DOMParser parser = new DOMParser();
       parser.setFeature("http://xml.org/sax/features/validation";, 
   

true);
 

       parser.setFeature("http://xml.org/sax/features/namespaces";, 
   

true);
 

parser.setFeature("http://apache.org/xml/features/validation/schema";, 
   

true);
 

       parser.setProperty(
"http://apache.org/xml/properties/schema/external-schemaLocation";,
             url.getFile() );
       parser.setErrorHandler( eh );
       parser.parse( source );
}
if( !eh.isValid() )
{
   throw new IOException( "There were errors when parsing the XML file: 
   

\n"
 

                       + eh.getErrorList() );
}
After parsing, the error handler object contains an error of "Line 3: 
cvc-elt.1: Cannot find the declaration of element 'Connection'."  Which 
is the root element of the project file.  I could be doing this 
completely wrong.  Any help would be great.  Thanks

~Mike
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Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: [EMAIL PROTECTED]
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