DOMConfiguration param. from getParameterNames() not recognized by getParameter

• Key: XERCESJ-971
• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Priority: Minor
• Assignee: Venugopal Rao K
• Reporter: Venugopal Rao K
• Component/s: DOM (Level 3 Core)
• Affects Version/s: 2.6.2
• Fix Version/s: 2.6.2

Description

all getParameterNames to get a list of parameter names known to the
DOM implementation. Call getParameter( name ) to get the current setting
of each supposedly known parameter.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
getParameter should never reject a parameter name from getParameterNames
as unknown (or getParameterNames should never return an unknown
parameter).

ACTUAL -
(See exact error below.)

getParameter throws a FEATURE_NOT_FOUND DOMException, saying it
doesn't recognize the feature name even though the feature name came
right from the DOM implementation.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
org.w3c.dom.DOMException: FEATURE_NOT_FOUND: The parameter
http://xml.org/sax/features/validation is not recognized.
at com.sun.org.apache.xerces.internal.dom.DOMConfigurationImpl.getParameter(DOM
ConfigurationImpl.java:863)
at prototype.ExploreDOM.main(Bug.java:29)
Exception in thread "main"


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------


import javax.xml.parsers.*;

import org.w3c.dom.*;


class Bug
{

    public static void main( String[] args )
throws Exception
    {
DocumentBuilder builder =
DocumentBuilderFactory.newInstance().newDocumentBuilder();

DOMConfiguration config = builder.newDocument().getDomConfig();
{
DOMStringList names = config.getParameterNames();
for ( int sx = 0; sx < names.getLength(); sx++ ) {
String name = names.item( sx );
Object value = config.getParameter( name );
// Throws exception:
// org.w3c.dom.DOMException: FEATURE_NOT_FOUND: The parameter
http://xml.org/sax/features/validation is not recognized.
// at com.sun.org.apache.xerces.internal.dom.DOMConfigurationImpl.getParameter(
DOMConfigurationImpl.java:863)
// at prototype.ExploreDOM.main(Bug.java:29)
}
}
    } // main( String[] )


} // class Bug