Ok, I got this aspect of it work now.  I do run into a related problem
though.  I actually am using a "chain" of entity resolvers.  So I ended
up needing to have my chain implement EntityResolver2 also:

http://github.com/sebersole/jdocbook-core/blob/master/src/main/java/org/jboss/jdocbook/xslt/EntityResolverChain.java

I am having trouble getting the delegation from
EntityResolver2#resolveEntity to EntityResolver#resolveEntity correct
given the need to manually account for the "expanded system id" much
like y'all do in
com.sun.org.apache.xerces.internal.impl.XMLEntityManager#expandSystemId

Is there a "public API" version of this method around?  Is it kosher to
cal that method directly in my code?


On Fri, 2010-08-20 at 13:50 -0500, Steve Ebersole wrote:
> So given the DOCTYPE I described:
> <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
> "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"; [
>     <!ENTITY % BOOK_ENTITIES SYSTEM
> "Hibernate_Getting_Started_Guide.ent">
>     %BOOK_ENTITIES;
> ]>
> 
> I see the following:
> (1) resolveEntity( "%BOOK_ENTITIES", ... );
> (2) resolveEntity( "[dtd]", ... );
> 
> I tried adding my "extra" entities during call (1).  Essentially, I load
> the contents of the referenced file
> (Hibernate_Getting_Started_Guide.ent), prepend my custom entities and
> wrap that whole thing up in a InputStream.  However that does not
> "work"; it does not seem to pick up my entities.  Found that a bit
> counter-intuitive.
> 
> If I delay this process until (2), I am not exactly sure what I am
> supposed to return.  As I understand it, I am being asked to resolve the
> actual DTD file
> (http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd)?
> 
> 
> On Fri, 2010-08-20 at 08:41 -0400, Michael Glavassevich wrote:
> > Steve Ebersole <steven.ebers...@gmail.com> wrote on 08/20/2010
> > 08:26:19 AM:
> > 
> > > On Fri, 2010-08-20 at 08:19 -0400, Michael Glavassevich wrote:
> > > > Perhaps EntityResolver2.getExternalSubset() is only part of the
> > > > solution. Can you show concrete examples where this wouldn't work
> > on
> > > > its own?
> > > 
> > > Based on what you said, I had assumed that something like this would
> > not
> > > work:
> > > http://anonsvn.jboss.org/repos/hibernate/core/trunk/documentation/
> > > manual/src/main/docbook/en-US/HIBERNATE_-
> > > _Relational_Persistence_for_Idiomatic_Java.xml
> > > 
> > > Because we have:
> > > <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
> > > "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"; [ 
> > > <!ENTITY % BOOK_ENTITIES SYSTEM "HIBERNATE_-
> > > _Relational_Persistence_for_Idiomatic_Java.ent">
> > > %BOOK_ENTITIES;
> > > ]>
> > > 
> > > So essentially we reference an external set of entities:
> > > http://anonsvn.jboss.org/repos/hibernate/core/trunk/documentation/
> > > manual/src/main/docbook/en-US/HIBERNATE_-
> > > _Relational_Persistence_for_Idiomatic_Java.ent
> > 
> > So instead of getExternalSubset() you'll get a call to resolveEntity()
> > and can do what I said below.
> > 
> > > > Note that if a document already has an external subset your
> > instance
> > > > of EntityResolver2 will get a call to resolveEntity() and you can
> > tell
> > > > by the entity name "[dtd]" that the parser is asking you to
> > resolve
> > > > it. That's also an opportunity to inject whatever entity
> > declarations
> > > > you want to add and could include the DTD you were asked to
> > resolve
> > > > through a parameter entity.
> > > > 
> > > > > Which takes me back to the question of a custom XIncludeHandler
> > and
> > > > (a)
> > > > > whether that is a valid option and (b) how to properly make sure
> > my
> > > > > custom XIncludeHandler gets used in the pipeline.
> > > > 
> > > > There's no supported way of doing that. You would have to reach
> > into
> > > > the implementation and if you managed to get something working
> > your
> > > > application could be broken with a future release of Xerces. We
> > make
> > > > no guarantees on the stability of internal components and warn
> > users
> > > > in the Javadoc that they're on shaky ground if they choose that
> > path.
> > > > 
> > > > > -- 
> > > > > Steve Ebersole <st...@hibernate.org>
> > > > > http://hibernate.org
> > > > > 
> > > > > 
> > > > >
> > > >
> > ---------------------------------------------------------------------
> > > > > To unsubscribe, e-mail: j-users-unsubscr...@xerces.apache.org
> > > > > For additional commands, e-mail: j-users-h...@xerces.apache.org
> > > > 
> > > > Thanks.
> > > > 
> > > > Michael Glavassevich
> > > > XML Parser Development
> > > > IBM Toronto Lab
> > > > E-mail: mrgla...@ca.ibm.com
> > > > E-mail: mrgla...@apache.org
> > > > 
> > > 
> > > -- 
> > > Steve Ebersole <st...@hibernate.org>
> > > http://hibernate.org
> > > 
> > > 
> > >
> > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: j-users-unsubscr...@xerces.apache.org
> > > For additional commands, e-mail: j-users-h...@xerces.apache.org
> > 
> > Michael Glavassevich
> > XML Parser Development
> > IBM Toronto Lab
> > E-mail: mrgla...@ca.ibm.com
> > E-mail: mrgla...@apache.org
> > 
> 

-- 
Steve Ebersole <st...@hibernate.org>
http://hibernate.org


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