Hi Brock,
Maybe you have xerces installed as bundle in your distribution ?
It sounds like a version mismatch.
Can you share the bundles installed ?
Thanks,
Regards
JB
> Le 23 févr. 2021 à 16:55, brock samson <brock.sams...@hotmail.com> a écrit :
>
> Hello,
>
> I am using Karaf 4.2.10 and attempting to perform a rather simple xml
> parsing:
>
> Caused by: java.lang.NullPointerException
> at org.apache.xerces.util.ErrorHandlerProxy.error(Unknown
> Source) ~[!/:?]
> at
> com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:137)
> ~[?:1.8.0_102]
> at
> com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)
> ~[?:1.8.0_102]
> at
> com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
> ~[?:1.8.0_102]
> at
> com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)
> ~[?:1.8.0_102]
> at
> com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1900)
> ~[?:1.8.0_102]
> at
> com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:740)
> ~[?:1.8.0_102]
> at
> com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.startElement(ValidatorHandlerImpl.java:570)
> ~[?:1.8.0_102]
> at
> org.apache.xerces.jaxp.JAXPValidatorComponent$XNI2SAX.startElement(Unknown
> Source) ~[!/:?]
> at
> org.apache.xerces.jaxp.JAXPValidatorComponent.startElement(Unknown Source)
> ~[!/:?]
> at
> org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
> Source) ~[!/:?]
> at
> org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(Unknown
> Source) ~[!/:?]
> at
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
> Source) ~[!/:?]
> at
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
> Source) ~[!/:?]
> at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
> Source) ~[!/:?]
> at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
> Source) ~[!/:?]
> at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
> ~[!/:?]
> at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
> ~[!/:?]
> at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown
> Source) ~[!/:?]
> at
> javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121)
> ~[?:1.8.0_102]
>
> After snooping around, I noticed a
> /container/lib/endorsed/org.apache.karaf.specs.java.xml-4.2.10.jar lib
> containing parser-related libs. My code executed successfully once I ran
> Karaf without this particular file, though I don’t feel right just pulling it
> out of Karaf blindly, as its absence creates a distinct possibility of
> unforeseen issues down the road.
>
> Here are the only imports my bundle references in its manifest:
> Import-Package:
> javax.xml.transform,javax.xml.transform.stream,org.xml.sax,javax.xml.parsers,javax.xml.validation
>
> There are no entries under Bundle-Classpath
>
> Lastly, here is the java code that performs the xml parsing:
>
> DocumentBuilderFactory factory =
> DocumentBuilderFactory.newInstance();
> SchemaFactory sf =
> SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
> Schema schema = sf.newSchema(new StreamSource(new
> FileInputStream("<LOCATION-OF-THE-SCHEMA-FILE>")));
> factory.setNamespaceAware(true);
> factory.setSchema(schema);
> factory.setExpandEntityReferences(false);
> factory.setXIncludeAware(false);
>
> factory.setFeature("http://xml.org/sax/features/external-parameter-entities
> <http://xml.org/sax/features/external-parameter-entities>",false);
>
> factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd
> <http://apache.org/xml/features/nonvalidating/load-external-dtd>",false);
>
> factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl
> <http://apache.org/xml/features/disallow-doctype-decl>", true);
>
> factory.setFeature("http://xml.org/sax/features/external-general-entities
> <http://xml.org/sax/features/external-general-entities>",false);
> DocumentBuilder builder = factory.newDocumentBuilder();
> builder.setErrorHandler(null);
> byte[] fileContent =
> Files.readAllBytes(Paths.get("<LOCATION-OF-THE-XML-FILE-TO-BE-PARSED>"));
> InputStream inStream = new ByteArrayInputStream(fileContent);
> Document doc = builder.parse(inStream);
>
> Please advise me as to what I am doing wrong, as well as a possible solution.
> Thank you for your time!
>
> Sincerely,
>
> Brock Samson
