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Posted to j-users@xerces.apache.org by Utsav Boobna <Ut...@lri.fr> on 2003/06/12 16:59:39 UTC
DTDGrammar initiating problem
Hi
In my Java program, I was trying to initiate a DTDGrammar.Below is
the part of my code ....... I cant understand why the grammar doesnt
initiate, probably I am missing something.
Please help.
SymbolTable sym = new SymbolTable(2039);
XMLDTDDescription desc = new XMLDTDDescription (null,"book.dtd",null,"book.dtd","book");
DTDGrammar grammar = new DTDGrammar (sym,desc);
Problem might be in specifying the system ID of the DTD(??).
all the files are in same directory.
Thanks,
Utsav
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Re: DTDGrammar initiating problem
Posted by Utsav Boobna <Ut...@lri.fr>.
Hi,
It is OK. I can get the DTDGrammar by preparsing the DTD. but then
how can I use its methods like startDTD, textDecl, elementDecl, etc ?
When I am trying to extend the DTDGrammar to a new class then again it
creates problem in initialising it. I would be grateful, if someone
can send a sample program which
exploits the above mentioned methods, ofcourse by extending the class
DTDGrammar.
Thanks,
Utsav
On Thu, 12 Jun 2003, Michael Glavassevich wrote:
> Hi Utsav,
>
> DTDGrammar implements org.apache.xerces.xni.grammars.Grammar, so all you
> need to do is cast it to a DTDGrammar (first checking that it's an
> instanceof DTDGrammar of course).
>
> As a side note, if you call getGrammarDescription().getGrammarType() on
> the Grammar object, you'll be
> able to tell what type of grammar was returned from the grammar
> preparser. You might want to have a look at the javadoc for the
> org.apache.xerces.xni.grammars package
> (http://xml.apache.org/xerces2-j/javadocs/xni/index.html).
>
> On Fri, 13 Jun 2003 Utsav.Boobna@lri.fr wrote:
>
> > Hi Michael,
> >
> > Thanks for the reply. Yes, you are right . I need the available
> > information from the given DTD. For any element I want its all possible
> > children. Thats why I tried to get DTDGrammar.(Is there any other suitable
> > way??)
> > Now as suggested by you, I have parsed the diven DTD but it returns me
> > Grammar. How can I get DTDGrammar?
> >
> > Utsav
> >
> >
> > > Hi Ustav,
> > >
> > > It seems to me that you're trying to parse a DTD, and obtain it's
> > > representation as a DTDGrammar. You should take a look at the
> > > XMLGrammarPreparser
> > > (http://xml.apache.org/xerces2-j/faq-grammars.html#faq-3).
> > >
> > > The approach you're taking doesn't do what you probably expected. Creating
> > > an instance of DTDGrammar doesn't cause your DTD to be parsed.
> > > DTDGrammar is a container, not a parser. The object won't contain any
> > > declarations, after instantiating it. It's normally populated from a
> > > stream generated by the XML scanner. So unless you were planning to
> > > populate it
> > > yourself by some other means, your best bet is to use the
> > > XMLGrammarPreparser.
> > >
> > > Hope that helps.
> > >
> > > On Thu, 12 Jun 2003, Utsav Boobna wrote:
> > >
> > >>
> > >> Hi
> > >> In my Java program, I was trying to initiate a DTDGrammar.Below is
> > >> the part of my code ....... I cant understand why the grammar doesnt
> > >> initiate, probably I am missing something.
> > >> Please help.
> > >>
> > >> SymbolTable sym = new SymbolTable(2039);
> > >> XMLDTDDescription desc = new XMLDTDDescription
> > >> (null,"book.dtd",null,"book.dtd","book");
> > >> DTDGrammar grammar = new DTDGrammar (sym,desc);
> > >>
> > >> Problem might be in specifying the system ID of the DTD(??).
> > >> all the files are in same directory.
> > >>
> > >> Thanks,
> > >> Utsav
> > >>
> > >>
> > >> ---------------------------------------------------------------------
> > >> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> > >> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
> > >>
> > >>
> > >
> > > --------------------
> > > Michael Glavassevich
> > > mrglavas@apache.org
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> > > For additional commands, e-mail: xerces-j-user-help@xml.apache.org
> > >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> > For additional commands, e-mail: xerces-j-user-help@xml.apache.org
> >
> >
>
> --------------------
> Michael Glavassevich
> mrglavas@apache.org
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
>
--
Utsav Boobna
Third Year UnderGraduate
Mathematics And Scientific Computing
Indian Institute Of Technology, Kanpur
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Re: DTDGrammar initiating problem
Posted by Michael Glavassevich <mr...@apache.org>.
Hi Utsav,
DTDGrammar implements org.apache.xerces.xni.grammars.Grammar, so all you
need to do is cast it to a DTDGrammar (first checking that it's an
instanceof DTDGrammar of course).
As a side note, if you call getGrammarDescription().getGrammarType() on
the Grammar object, you'll be
able to tell what type of grammar was returned from the grammar
preparser. You might want to have a look at the javadoc for the
org.apache.xerces.xni.grammars package
(http://xml.apache.org/xerces2-j/javadocs/xni/index.html).
On Fri, 13 Jun 2003 Utsav.Boobna@lri.fr wrote:
> Hi Michael,
>
> Thanks for the reply. Yes, you are right . I need the available
> information from the given DTD. For any element I want its all possible
> children. Thats why I tried to get DTDGrammar.(Is there any other suitable
> way??)
> Now as suggested by you, I have parsed the diven DTD but it returns me
> Grammar. How can I get DTDGrammar?
>
> Utsav
>
>
> > Hi Ustav,
> >
> > It seems to me that you're trying to parse a DTD, and obtain it's
> > representation as a DTDGrammar. You should take a look at the
> > XMLGrammarPreparser
> > (http://xml.apache.org/xerces2-j/faq-grammars.html#faq-3).
> >
> > The approach you're taking doesn't do what you probably expected. Creating
> > an instance of DTDGrammar doesn't cause your DTD to be parsed.
> > DTDGrammar is a container, not a parser. The object won't contain any
> > declarations, after instantiating it. It's normally populated from a
> > stream generated by the XML scanner. So unless you were planning to
> > populate it
> > yourself by some other means, your best bet is to use the
> > XMLGrammarPreparser.
> >
> > Hope that helps.
> >
> > On Thu, 12 Jun 2003, Utsav Boobna wrote:
> >
> >>
> >> Hi
> >> In my Java program, I was trying to initiate a DTDGrammar.Below is
> >> the part of my code ....... I cant understand why the grammar doesnt
> >> initiate, probably I am missing something.
> >> Please help.
> >>
> >> SymbolTable sym = new SymbolTable(2039);
> >> XMLDTDDescription desc = new XMLDTDDescription
> >> (null,"book.dtd",null,"book.dtd","book");
> >> DTDGrammar grammar = new DTDGrammar (sym,desc);
> >>
> >> Problem might be in specifying the system ID of the DTD(??).
> >> all the files are in same directory.
> >>
> >> Thanks,
> >> Utsav
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> >> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
> >>
> >>
> >
> > --------------------
> > Michael Glavassevich
> > mrglavas@apache.org
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> > For additional commands, e-mail: xerces-j-user-help@xml.apache.org
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
>
>
--------------------
Michael Glavassevich
mrglavas@apache.org
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Re: DTDGrammar initiating problem
Posted by Ut...@lri.fr.
Hi Michael,
Thanks for the reply. Yes, you are right . I need the available
information from the given DTD. For any element I want its all possible
children. Thats why I tried to get DTDGrammar.(Is there any other suitable
way??)
Now as suggested by you, I have parsed the diven DTD but it returns me
Grammar. How can I get DTDGrammar?
Utsav
> Hi Ustav,
>
> It seems to me that you're trying to parse a DTD, and obtain it's
> representation as a DTDGrammar. You should take a look at the
> XMLGrammarPreparser
> (http://xml.apache.org/xerces2-j/faq-grammars.html#faq-3).
>
> The approach you're taking doesn't do what you probably expected. Creating
> an instance of DTDGrammar doesn't cause your DTD to be parsed.
> DTDGrammar is a container, not a parser. The object won't contain any
> declarations, after instantiating it. It's normally populated from a
> stream generated by the XML scanner. So unless you were planning to
> populate it
> yourself by some other means, your best bet is to use the
> XMLGrammarPreparser.
>
> Hope that helps.
>
> On Thu, 12 Jun 2003, Utsav Boobna wrote:
>
>>
>> Hi
>> In my Java program, I was trying to initiate a DTDGrammar.Below is
>> the part of my code ....... I cant understand why the grammar doesnt
>> initiate, probably I am missing something.
>> Please help.
>>
>> SymbolTable sym = new SymbolTable(2039);
>> XMLDTDDescription desc = new XMLDTDDescription
>> (null,"book.dtd",null,"book.dtd","book");
>> DTDGrammar grammar = new DTDGrammar (sym,desc);
>>
>> Problem might be in specifying the system ID of the DTD(??).
>> all the files are in same directory.
>>
>> Thanks,
>> Utsav
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
>> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
>>
>>
>
> --------------------
> Michael Glavassevich
> mrglavas@apache.org
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
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Re: DTDGrammar initiating problem
Posted by Michael Glavassevich <mr...@apache.org>.
Hi Ustav,
It seems to me that you're trying to parse a DTD, and obtain it's
representation as a DTDGrammar. You should take a look at the
XMLGrammarPreparser
(http://xml.apache.org/xerces2-j/faq-grammars.html#faq-3).
The approach you're taking doesn't do what you probably expected. Creating
an instance of DTDGrammar doesn't cause your DTD to be parsed.
DTDGrammar is a container, not a parser. The object won't contain any
declarations, after instantiating it. It's normally populated from a
stream generated by the XML scanner. So unless you were planning to populate it
yourself by some other means, your best bet is to use the
XMLGrammarPreparser.
Hope that helps.
On Thu, 12 Jun 2003, Utsav Boobna wrote:
>
> Hi
> In my Java program, I was trying to initiate a DTDGrammar.Below is
> the part of my code ....... I cant understand why the grammar doesnt
> initiate, probably I am missing something.
> Please help.
>
> SymbolTable sym = new SymbolTable(2039);
> XMLDTDDescription desc = new XMLDTDDescription (null,"book.dtd",null,"book.dtd","book");
> DTDGrammar grammar = new DTDGrammar (sym,desc);
>
> Problem might be in specifying the system ID of the DTD(??).
> all the files are in same directory.
>
> Thanks,
> Utsav
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
>
>
--------------------
Michael Glavassevich
mrglavas@apache.org
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