Hi Brock,
I tried your jar but it failed due to the layout of the jar (the MANIFEST
was not the first entry in the jar or something like that). I created a
bundle with our code and when I tried with karaf 4.3 it passed.
I then tried with 4.2.7 and I experienced the same NPE. Apparently the
behavior when the errorHandler is set to null is different between
implementations of the XML libs supplied in these two versions of karaf.
In your code setting the error handler to builder.setErrorHandler(new
org.xml.sax.helpers.DefaultHandler()); seems to do the trick.
I noticed your manifest is importing a bunch of packages not required for
the code in question.
Regards
João Assunção
Email: joao.assun...@exploitsys.com
Mobile: +351 916968984
Phone: +351 211933149
Web: www.exploitsys.com
On Tue, Mar 2, 2021 at 3:33 AM brock samson <brock.sams...@hotmail.com>
wrote:
> hi, JB. did you get a chance to run my bundle?
>
> ------------------------------
> *From:* brock samson <brock.sams...@hotmail.com>
> *Sent:* Wednesday, February 24, 2021, 11:18 PM
> *To:* user@karaf.apache.org
> *Subject:* Re: Karaf 4.2.10 - NullPointerException during xml parsing
>
> hi, JB.
>
> thank you for looking at this. The attached zip (rename its extension from
> .txt to .zip) contains both the bundle (rename its extension from .txt to
> .jar) and its feature file. the bundle should be placed in the */bundles* dir,
> and you know what to do with the feature file =)
> here are some points regarding the bundle:
> 1) the bundle executes automatically during Karaf startup to make it
> easier for you.
> 2) The bundle contains both the schema and the xml, so you dont have to
> really do anything to the bundle itself in order for it to just run
> 3) The bundle contains *props.properties* where you can specify external
> locations to both schema and xml file if you choose to do so for any
> reason. The provided files will be ignored in such case.
> 4) I have also provided the source .java alongside the binary just in case.
>
> again, really appreciate you taking the time to look at it. thanks!!!
>
> Brock Samson
>
> ------------------------------
> *From:* Jean-Baptiste Onofre <j...@nanthrax.net>
> *Sent:* Tuesday, February 23, 2021 11:56 AM
> *To:* user@karaf.apache.org <user@karaf.apache.org>
> *Subject:* Re: Karaf 4.2.10 - NullPointerException during xml parsing
>
> 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",*false*);
> factory.setFeature("
> http://apache.org/xml/features/nonvalidating/load-external-dtd",*false*);
> factory.setFeature("
> http://apache.org/xml/features/disallow-doctype-decl";, *true*);
> factory.setFeature("
> 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
>
>
>
>
