NullPointerException with SAX

I have developed a CSV to XML parser using a JAXP with SAX Events to parse the CSV file into a DOM tree.
Well inside the parse() method I have the following code":
public void parse(InputSource input) throws IOException, SAXException
BufferedReader br = null;
if( input.getCharacterStream() != null )
br = new BufferedReader( input.getCharacterStream() );
else if( input.getByteStream() != null )
br = new BufferedReader( new InputStreamReader( input.getByteStream() ) );
else if( input.getSystemId() != null )
URL url = new URL( input.getSystemId() );
br = new BufferedReader( new InputStreamReader( url.openStream() ) );
else
throw new SAXException( "Objeto InputSource invalido" );
ContentHandler ch = getContentHandler();
ch.startDocument();
ch.startElement( "", "", "file", new AttributesImpl() );
this.parseInput( br );
ch.endElement( "", "", "file" );
ch.endDocument();
Problem is that whenever the app gets to the ch.startDocument() statement it throws an java.lang.NullPointerExecption. I have no idea why this is happening, I have tested the very same code with Xalan 2 and Xercer 2 parsers and it works without problems. But using the oracle xml parser v2 throws the Exception.
Is this a bug? should I set tome of the Transformer's attributes to an specifica value to avoid this? Where could I find more info on processing SAX events?
Thanks,
Fedro

Fedro,
Did you try it using XDK v10?

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Java.lang.NullPointerException with OracleXMLParser V2

Hi,
I am getting java.lang.NullPointerException with OracleXMLParser V2.
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Best Regards,
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Hi,
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Hello,
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when I parse the following xml file:
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<!DOCTYPE dinner SYSTEM "dinner.dtd">
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[C:\temp\xml]java -cp c:\TEMP\xml\oracle\lib\xmlparser.jar;.
SAXParseXML oracle.xml.parser.XMLParser dinner.xml
Locater accepted: oracle.xml.parser.SAXLocator@6ba51a96
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[error: Couldn't find external DTD 'dinner.dtd']
element dinner start: null:4:1
(other output follows with no more errors)
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I've tested the same thing with the IBM, Microstar and Sun
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Hope to hear from you! (cc in with mail please)
Erwin.
null

Thanks for the post. You have identified a bug which will be
fixed in a maintenance release. Until that time you can parse a
String type rather than a InputSource type in SAXParseXML.java as
a workaround.
Oracle XML Team
http://technet.oracle.com
Erwin Vervaet (guest) wrote:
: Oracle XML Team wrote:
: : Which version of the parser are you using? If not 1.0.0.3
(the
: : latest) try that version. If the problem still exists it
would
: : help if you could provide your test program.
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it
: on monday 8/2/1999) says: 'Oracle XML Parser 1.0.0.3.0'.
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: program. The command I use to start the program is the
following
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Sun
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: [C:\temp\xml]dir
: Volume in drive C is unlabeled Serial number is 2C90:8BDE
: Directory of C:\temp\xml\*
: 11/02/99 10:50 <DIR> .
: 11/02/99 10:50 <DIR> ..
: 9/02/99 16:34 <DIR> aelfred
: 9/02/99 21:56 <DIR> oracle
: 8/02/99 17:44 <DIR> xml-ea2
: 8/02/99 14:10 <DIR> xml4j
: 9/02/99 22:44 <DIR> xp
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: 9/02/99 23:03 167 dinner.xml
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: 10.034 bytes in 11 files and 7 dirs 12.800 bytes
: allocated
: 201.152.512 bytes free
: [C:\temp\xml]java -cp c:\temp\xml\oracle\lib\xmlparser.jar;.
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: public class SAXErrHandler implements ErrorHandler {
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: System.err.println("[warning: " + exception +
: public void error(SAXParseException exception) throws
: SAXException {
: System.err.println("[error: " + exception + "]");
: public void fatalError(SAXParseException exception)
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: System.err.println("[fatal error: " + exception + "]");
: //file SAXEntityResolver.java
: import org.xml.sax.*;
: import java.net.*;
: import java.io.*;
: public class SAXEntityResolver implements EntityResolver {
: public InputSource resolveEntity(String publicId, String
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: System.out.println("<<Call to resolveEntity>> " + publicId + "
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: URL url=new URL(systemId);
: return new InputSource(url.openStream());
: catch (MalformedURLException e1) {
: try { //it's not a URL, assume a file
: spec
: FileInputStream fin=new
: FileInputStream(systemId);
: return new InputSource(fin);
: catch (FileNotFoundException e2) {
: return null; //don't understand
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: //file SAXDocHandler.java
: import org.xml.sax.*;
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: private Locator locator=null;
: public void startDocument() throws SAXException {
: System.out.println("document parsing start");
: public void setDocumentLocator(Locator locator) {
: System.out.println("Locater accepted: " + locator);
: this.locator=locator;
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: throws SAXException {
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: System.out.println("attribute " +
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atts.getType(i)
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: public void endElement(String name) throws SAXException {
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locate());
: public void processingInstruction(String target, String
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: public void endDocument() throws SAXException {
: System.out.println("document parsing end");
: private String locate() {
: if (locator!=null) {
: return locator.getSystemId() + ":" +
: locator.getLineNumber() + ":" + locator.getColumnNumber();
: return "";
: //file SAXParseXML.java
: import org.xml.sax.*;
: import org.xml.sax.helpers.ParserFactory;
: import java.io.*;
: public class SAXParseXML {
: public static void main(String[] args) {
: if (args.length>1) {
: try {
: Parser
: p=ParserFactory.makeParser(args[0]);
: p.setDocumentHandler(new
: SAXDocHandler());
: p.setErrorHandler(new
: SAXErrHandler());
: p.setEntityResolver(new
: SAXEntityResolver());
: File f=new File(args[1]);
: InputSource src=new
: InputSource(new FileInputStream(f));
: src.setSystemId(f.toURL().toString());
: p.parse(src);
: catch (Exception e) {
: e.printStackTrace();
: //file dinner.xml
: <?xml version="1.0"?>
: <!DOCTYPE dinner SYSTEM "dinner.dtd">
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: <location planet="Earth">Alma 3</location>
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: </dinner>
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: <!ELEMENT location (#PCDATA)>
: <!ELEMENT time (#PCDATA)>
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code3 wrote:
The exception is pointing to this:
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Do you understand anyway when a NullPointerException would be thrown? It will be thrown if you try to access/invoke an object reference which is actually null.
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It's more likely that NPE was thrown from
Issue.setWhereClause(WhereClause);
This would happen if Issue is null, which means that the findViewObject() method couldn't find a VO named "EmIssueView1". Make sure that the VO name is spelled corectly. Names are case sensitive.
Thanks.
Sung

Java.lang.NullPointerException with rich:pickList

Hi every Body,
I still getting a problem with my <rich:pickList> and really I need help. I got an error when executing the application, I debugged the application and I have notice that the problem cames from the PickList tag.
the error is as follow:
java.lang.NullPointerException
        at com.sun.facelets.util.FastWriter.write(FastWriter.java:77)
        at com.sun.facelets.StateWriter.write(StateWriter.java:116)
        at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.write(HtmlResponseWriter.java:495)
        at org.richfaces.renderkit.PickListRenderer.encodeItem(PickListRenderer.java:194)
        at org.richfaces.renderkit.PickListRenderer.encodeRows(PickListRenderer.java:152)
        at org.richfaces.renderkit.PickListRenderer.encodeSourceRows(PickListRenderer.java:209)
        at org.richfaces.renderkit.html.PickListRendererGen.doEncodeChildren(PickListRendererGen.jav
a:344)
        at org.richfaces.renderkit.html.PickListRendererGen.doEncodeChildren(PickListRendererGen.jav
a:258)
        at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
        at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRendere
r.java:79)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.ja
va:271)
        at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
        at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
        at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
        at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
        at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
        at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.jav
a:411)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:317)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:154)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:260)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:366)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:493)
        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:230)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:230)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:27
1)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProces
sorTask.java:637)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorT
ask.java:568)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTas
k.java:813)
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultRead
Task.java:341)
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
        at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
        at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106
)     My backing bean:
@Stateful
@Name("adminAction")
@Scope(ScopeType.SESSION)
public class AdminActionBean implements AdminActionLocal {
@Out(required=false)
   private List<Customer> companyNames;
   @Out(required=false)
   private ArrayList<SelectItem> companyNamesOption;
   @In(required=false)
   @Out(required=false)
   private List<Long> customersChoice = new ArrayList<Long>();
public void selectCompanyNames(){
       setCompanyNames((List<Customer>) getEm().createQuery("select c from Customer c")
                    .getResultList());
   @Factory("companyNamesOption")
   public void selectCompanyNamesOption(){
       selectCompanyNames();
       for (int i=0;i <companyNames.size();i++){
           log.info("customers size =#0",companyNames.size());
           if(companyNamesOption== null)
               companyNamesOption = new ArrayList<SelectItem>();
           SelectItem item = new SelectItem(companyNames.get(i).getCustomerId(), companyNames.get(i)
.getCompanyName(), companyNames.get(i).getCompanyName() );
           companyNamesOption.add(item);
           log.info("customers size2 =#0",customers.size());
// getter and setter
...My .xhtml page:
<rich:pickList id="customersChoice" value="#{adminAction.customersChoice}">
                    <f:selectItems value="#{companyNamesOption}" />
                </rich:pickList>     When debugging, the message error is displayed exactly after the selectCompanyNamesOption() method.
thank you very much
cheers
bibou

bibou wrote:
java.lang.NullPointerException
at com.sun.facelets.util.FastWriter.write(FastWriter.java:77)I would consider it as a bug in Facelets. But you might also have done something seriously wrong with your RichFaces tag and the logic behind which caused this unexpected exception.
For more accurate answers, try reposting this question at the RichFaces forum at JBoss.com, there where the RichFaces boys walk around. You see, you're here at a Sun forum where mainly Mojarra boys walk around.

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