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RE: Problem parsing XML file with Xerces-J

• To: "'Midsummer Sun'" <midsummer.sun@g...>
• Subject: RE: Problem parsing XML file with Xerces-J
• From: "Michael Kay" <mike@s...>
• Date: Thu, 31 Mar 2005 15:02:07 +0100
• Cc: <xml-dev@l...>
• In-reply-to: <bb5e8b86050331053731edca96@m...>
• Thread-index: AcU19s+ITLpcVAg8S1OEX3zxWo3QDwAAy4Bg

I doubt it will work, I think you have to supply a Reader that reads an
empty document, e.g. inputSource.setReader(new StringReader("")). Check the
spec.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Midsummer Sun [mailto:midsummer.sun@g...] 
> Sent: 31 March 2005 14:38
> To: Michael Kay
> Cc: xml-dev@l...
> Subject: Re:  Problem parsing XML file with Xerces-J
> 
> I am sorry if I am breaching the protocol of the list. But can you
> please tell whether just this method call "within resolveEntity method
> (shown in my last post)"
> 
> return new InputSource();
> 
> shall achive "return an InputSource pointing to an empty DTD" 
> you suggested..
> Or do I have to do something else?
> 
> I'll try to solve the exception handling error myself..
> 
> Best regards,
> 
> On Thu, 31 Mar 2005 13:48:41 +0100, Michael Kay 
> <mike@s...> wrote:
> > I'm not the right person, and this isn't the right place, 
> to teach you Java
> > programming.
> > 
> > Michael Kay
> > http://www.saxonica.com/
> > 
> > > -----Original Message-----
> > > From: Midsummer Sun [mailto:midsummer.sun@g...]
> > > Sent: 31 March 2005 13:20
> > > To: Michael Kay
> > > Cc: xml-dev@l...
> > > Subject: Re:  Problem parsing XML file with Xerces-J
> > >
> > > I am obliged by your help.
> > >
> > > So I have done this change to my Java class (which extends
> > > DefaultHandler) i.e. added this method definition..
> > >
> > > public InputSource resolveEntity(java.lang.String publicId,
> > >                                    java.lang.String systemId)
> > >                      throws java.io.IOException, SAXException
> > >  {
> > >
> > >     return new InputSource();
> > >  }
> > >
> > > I guess that "return new InputSource()" method call will return an
> > > InputSource pointing to an empty DTD(you suggested this 
> workaround).
> > > Please correct me if I am wrong.
> > >
> > > But the program is giving error:
> > >
> > > XYZ.java:125: 
> resolveEntity(java.lang.String,java.lang.String) in XYZ
> > > cannot override 
> resolveEntity(java.lang.String,java.lang.String) in
> > > org.xml.
> > > sax.helpers.DefaultHandler; overridden method does not throw
> > > java.io.IOException
> > >
> > >   public InputSource resolveEntity(java.lang.String publicId,
> > >                      ^
> > > 1 error
> > >
> > > Now this seems to be a Java exception handling problem.. 
> I am good at
> > > Java but not too good!
> > >
> > > Please tell the remedy.
> > >
> > > Best regards,
> > >
> > >
> > > On Thu, 31 Mar 2005 12:26:54 +0100, Michael Kay
> > > <mike@s...> wrote:
> > > > You need to do two things
> > > >
> > > > (a) register your EntityResolver with the parser - 
> you've done this
> > > >
> > > > (b) use your EntityResolver to resolve URI references - you
> > > seem to have
> > > > omitted this step.
> > > >
> > > > This means you need to implement the resolveEntity() method
> > > to do something
> > > > useful when presented with the system ID of the 
> external DTD - like
> > > > returning an InputSource pointing to an empty DTD.
> > > >
> > > > The default implementation of resolveEntity() in 
> DefaultHandler does
> > > > nothing, you need to override it.
> > > >
> > > > Michael Kay
> > > > http://www.saxonica.com/
> > >
> > 
> >
> 

• References:
  • Re: Problem parsing XML file with Xerces-J
    • From: Midsummer Sun <midsummer.sun@g...>

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