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Posted to user@commons.apache.org by "Mcduffey, Joe" <jd...@nsa.gov> on 2007/08/08 18:40:59 UTC
RE: Problem with JXPath 1.3 - Registering Namespaces
Matt,
With JXPath 1.2 I cannot create xpaths with xml namespace prefixes.
JXPathContext.registerNamespace("A","http://A");
JXPathContext.createPathAndSetValue("A:ElementB[1],"value");
<A:ElementB>MY VALUE</A:ElementB>
I get an exception
"Exception trying to create xpath"
There are no problems when there is a namespace prefix associated with an attribute. What is the deal with Elements? Thanks.
-----Original Message-----
From: Matt Benson [mailto:gudnabrsam@yahoo.com]
Sent: Thursday, July 26, 2007 12:10 PM
To: Jakarta Commons Users List
Subject: RE: Problem with JXPath 1.3 - Registering Namespaces
--- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> You may want to remove the Snapshot view. Thanks.
Joe: My history is as a JXPath user like yourself who
happened to have existing ties to the ASF (Apache
Ant). I stepped up to push JXPath to a 1.3 release
because there wasn't an active resource on it. I
honestly never noticed this outdated API was on the
site. Let me see what I can do about moving that.
Sorry for the inconvenience.
-Matt
>
> -----Original Message-----
> From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> Sent: Thursday, July 26, 2007 11:28 AM
> To: Jakarta Commons Users List
> Subject: RE: Problem with JXPath 1.3 - Registering
> Namespaces
>
>
>
> --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
>
> > Concerning problem 2 I thought you all were going
> > to specify a default Namespace so that this
> wouldn't
> > be required.
>
> Problem 1, you mean?
>
> >
> > for JXPathContext:
> > void registerDefaultNamespace(java.lang.String
> uri)
> > Binds a namespace URI for XPath QNames
> > that are missing the prefix.
> >
> >
> > I did not see this in the nightly build. Are you
> all
> > backing away from this? Thanks.
> >
>
> Exactly. In the JIRA issue I referenced the
> discussion went on about this for over a year.
> During
> this time a leading XML guru, Elliotte Rusty Harold
> (http://www.cafeconleche.org), was able to convince
> all concerned that JXPath would be more true to the
> XPath 1.0 spec _not_ to implement this XPath
> 2.0-specific behavior, and furthermore that this was
> the correct thing to do.
>
> -Matt
>
> > -----Original Message-----
> > From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> > Sent: Wednesday, July 25, 2007 5:45 PM
> > To: Jakarta Commons Users List
> > Subject: RE: Problem with JXPath 1.3 - Registering
> > Namespaces
> >
> >
> >
> > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> >
> > > Matt,
> > > Thanks for getting back...
> > > There are 2 problems:
> > > 1. What steps should be taken if you have an
> > default
> > > namespace defined? see below
> > > <ElementA xmlns="urn:/myspace"
> > > A:myAttr="Mytype">
> > > <ElementB>MY VALUE</ElementB>
> > > </ElementA>
> > >
> > > I get no results from
> > > JXPathContext.selectNodes("//ElementB");
> > > However if I register a namespace as the default
> > > namespace uri I can get my results:
> > >
> > >
> >
>
JXPathContext.registerNamespace("myns","urn:/myspace");
> > > // Default Namespace
> > > then query
> > > XPathContext.selectNodes("//myns:ElementB");
> >
> > Joe: this is as it should be. See
> > https://issues.apache.org/jira/browse/JXPATH-61
> for
> > a
> > LENGTHY discussion.
> >
> > >
> > > 2. The next problem is that I thought if I
> > register
> > > namespaces e.g.
> > > JXPathContext.registerNamespace();
> > > Then I would not have to worry about the
> document
> > > not having them. However when I call
> > >
> > > JXPathContext.registerNamespace("A","http://A");
> > >
> >
>
JXPathContext.createPathAndSetValue("ElementA[1]/@A:mystuff,"value");
> > >
> > > For the following
> > >
> > > <ElementA xmlns="urn:/myspace">
> > > <ElementB A:mystuff="junk">MY
> > VALUE</ElementB>
> > > </ElementA>
> > >
> > > I get an exception thrown saying A
> > >
> > >
> >
>
org.apache.common.ri.model.dom.DOMNodePointer.createAttribute
> > > unknown namespace prefix: A
> > >
> >
> > It is my understanding that I have fixed this
> issue
> > this afternoon in svn trunk. If you can verify
> > this,
> > I'd appreciate it.
> >
> > > HELP!
> >
> > If you don't mind some helpful advice in the way
> of
> > protocol, all-caps shouts of "HELP" will generally
> > not
> > help your cause. This subject, among others, is
> > covered in the document
> > http://www.catb.org/~esr/faqs/smart-questions.html
> .
> >
> > Regards,
> > Matt
> >
> > >
> > > -----Original Message-----
> > > From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> > > Sent: Wednesday, July 25, 2007 3:48 PM
> > > To: Jakarta Commons Users List
> > > Subject: RE: Problem with JXPath 1.3 -
> Registering
> > > Namespaces
> > >
> > >
> > >
> > > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> > >
> > > > I have an instance with a default namespace
> > > however
> > > > I cannot get any results from a selectNodes()
> > > call.
> > > > However if I register a
> namespaceNamespace("A",
> > > > "http://A/") with the Default namespace the
> > query
> > > > works e.g.
> > > > JXpathContext.selectNodes(//A:Element)
> > > > but if I did not register the namespace and
> try
> > to
> > > > run the query as
> > > > JXpathContext.selectNodes(//Element) I get no
> > > > Results.
> > > >
> > > > HELP!!!!!!!!!!!!!!!!
> > >
> > > Whoa... calm down! :) I can't follow all that.
>
> > > Give
> > > me a breakdown of exactly how to evoke the
> > > (mis-)behavior you're seeing. Also, note that
> in
> > a
> > > few minutes' time I'll be committing what is
> > > intended
> > > to fix your problems with
> createPathAndSetValue()
> > > for
> > > externally-registered namespaced attributes.
> > >
> > > -Matt
> > >
> > > >
> > > > -----Original Message-----
> > > > From: Mcduffey, Joe [mailto:jdmcduf@nsa.gov]
> > > > Sent: Wednesday, July 25, 2007 11:37 AM
> > > > To: Jakarta Commons Users List
> > > > Subject: RE: Problem with JXPath 1.3 -
> > Registering
> > > > Namespaces
> > > >
> > > >
> > > > Having a problem after registering a namespace
> > as
> > > in
> > > > your example then executing the following:
> > > > -
> createPathAndSetValue(element/@A:attribute);
> > > >
> > > > -----Original Message-----
> > > > From: Matt Benson
> [mailto:gudnabrsam@yahoo.com]
> > > > Sent: Wednesday, July 25, 2007 11:15 AM
> > > > To: Jakarta Commons Users List
> > > > Subject: RE: Problem with JXPath 1.3 -
> > Registering
> > > > Namespaces
> > > >
> > > >
> > > > Joe: Did you test Sergey's patch or the
> latest
> > > 1.3
> > > > trunk as of Tuesday afternoon/evening? As of
> > that
> > > > time the svn trunk version worked for me
> against
> > > > your
> > > > submitted example. If not, please attach more
> > > code
> > > > which shows how to break the current ns
> handling
> > > and
> > > > reopen JXPATH-97 in JIRA. I'm trying to get
> all
> > > > bugs
> > > > resolved for a 1.3 release and this definitely
> > > > sounds
> > > > like something we want to have working
> properly.
> > > >
> > > > Thanks,
> > > > Matt
> > > >
> > > >
> > > > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> > > >
> > > > > This still doesn't work properly see
> previous
> > > > > message from 7/20/07...
> > > > >
> > > > > ------------------ FROM PREVIOUS MESSAGE
> > > > > ------------------
> > > > > After registering Namespaces in JXPath 1.3
> and
> > > > then
> > > > > calling
> > > > >
> JXPathContext.createPathAndSetValue(key,value)
> > > > > I get an exception
> > > > > Unknown namespace prefix
> > > > >
> > > > > However it had been successfully registered
> as
> > I
> > > > > checked with the method call
> > > > > JXPathContext.getPrefix();
> > > > >
> > > > > Any help in this area????
> > > > > ------------------ FROM PREVIOUS MESSAGE
> > > > > ------------------
> > > > >
> > > > > -----Original Message-----
> > > > > From: Sergey Vladimirov
> > > > [mailto:vlsergey@gmail.com]
> > > > > Sent: Saturday, July 21, 2007 10:12 AM
> > > > > To: Jakarta Commons Users List
> > > > > Subject: Re: Problem with JXPath 1.3 -
> > > Registering
> > > > > Namespaces
> > > > >
> > > > >
> > > > > Joe,
> > > > >
> > > > > Please, look at the following issue and fix
> :)
> > > > >
> http://issues.apache.org/jira/browse/JXPATH-97
> > > > >
> > > > > --
> > > > > Sergey
> > > > >
> > > > >
> > > > > 2007/7/16, Mcduffey, Joe <jd...@nsa.gov>:
> > > > > >
> > > > > > Can someone tell me how to register
> > namespaces
> > > > so
> > > > > that attributes with
> > > > > > namespaces does not cause the exception
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
org.apache.common.ri.model.dom.DOMNodePointer.createAttribute
> > > > > > unknown namespace prefix: xsi
> > > > > >
> > > > > > For example the following
> > > > > > <ElementA A:myAttr="Mytype">
> > > > > > <B:ElementB>MY VALUE</B:ElementB>
> > > > > > </ElementA>
> > > > > >
> > > > > > Would result in the following exception:
> > > > > >
> > > > >
> > > >
> > >
> >
>
org.apache.common.ri.model.dom.DOMNodePointer.createAttribute
> > > > > > unknown namespace prefix: A
> > > > > >
> > > > > > FYI: In this example there was a namespace
> > > > > decaration in the file and I
> > > > > > also manually called the
> > > > > > registerNamespace(A,"/http...");
> > > > > > registerNamespace(B,"/http...");
> > > > > >
> > > > > > There was no problem encountered for
> > elements.
> > > > > Only attributes. Can
> > > > > > someone help? Thanks.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Sergey Vladimirov
> > > > >
> > > > >
> > > >
> > >
> >
>
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RE: Problem with JXPath 1.3 - Registering Namespaces
Posted by Matt Benson <gu...@yahoo.com>.
--- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> Matt,
> With JXPath 1.2 I cannot create xpaths with xml
> namespace prefixes.
>
> JXPathContext.registerNamespace("A","http://A");
>
>
>
JXPathContext.createPathAndSetValue("A:ElementB[1],"value");
>
>
> <A:ElementB>MY VALUE</A:ElementB>
>
> I get an exception
> "Exception trying to create xpath"
>
> There are no problems when there is a namespace
> prefix associated with an attribute. What is the
> deal with Elements? Thanks.
Hi, Joe. It's more a case of "what is the deal with
attributes?" It just so happens that a DOM or JDOM
element node knows how to set its attributes. Not so
for elements. In this case you must implement and set
an AbstractFactory on your JXPathContext.
HTH,
Matt
>
> -----Original Message-----
> From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> Sent: Thursday, July 26, 2007 12:10 PM
> To: Jakarta Commons Users List
> Subject: RE: Problem with JXPath 1.3 - Registering
> Namespaces
>
>
>
> --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
>
> > You may want to remove the Snapshot view. Thanks.
>
> Joe: My history is as a JXPath user like yourself
> who
> happened to have existing ties to the ASF (Apache
> Ant). I stepped up to push JXPath to a 1.3 release
> because there wasn't an active resource on it. I
> honestly never noticed this outdated API was on the
> site. Let me see what I can do about moving that.
> Sorry for the inconvenience.
>
> -Matt
>
> >
> > -----Original Message-----
> > From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> > Sent: Thursday, July 26, 2007 11:28 AM
> > To: Jakarta Commons Users List
> > Subject: RE: Problem with JXPath 1.3 - Registering
> > Namespaces
> >
> >
> >
> > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> >
> > > Concerning problem 2 I thought you all were
> going
> > > to specify a default Namespace so that this
> > wouldn't
> > > be required.
> >
> > Problem 1, you mean?
> >
> > >
> > > for JXPathContext:
> > > void registerDefaultNamespace(java.lang.String
> > uri)
> > > Binds a namespace URI for XPath QNames
> > > that are missing the prefix.
> > >
> > >
> > > I did not see this in the nightly build. Are you
> > all
> > > backing away from this? Thanks.
> > >
> >
> > Exactly. In the JIRA issue I referenced the
> > discussion went on about this for over a year.
> > During
> > this time a leading XML guru, Elliotte Rusty
> Harold
> > (http://www.cafeconleche.org), was able to
> convince
> > all concerned that JXPath would be more true to
> the
> > XPath 1.0 spec _not_ to implement this XPath
> > 2.0-specific behavior, and furthermore that this
> was
> > the correct thing to do.
> >
> > -Matt
> >
> > > -----Original Message-----
> > > From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> > > Sent: Wednesday, July 25, 2007 5:45 PM
> > > To: Jakarta Commons Users List
> > > Subject: RE: Problem with JXPath 1.3 -
> Registering
> > > Namespaces
> > >
> > >
> > >
> > > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> > >
> > > > Matt,
> > > > Thanks for getting back...
> > > > There are 2 problems:
> > > > 1. What steps should be taken if you have an
> > > default
> > > > namespace defined? see below
> > > > <ElementA xmlns="urn:/myspace"
> > > > A:myAttr="Mytype">
> > > > <ElementB>MY VALUE</ElementB>
> > > > </ElementA>
> > > >
> > > > I get no results from
> > > > JXPathContext.selectNodes("//ElementB");
> > > > However if I register a namespace as the
> default
> > > > namespace uri I can get my results:
> > > >
> > > >
> > >
> >
>
JXPathContext.registerNamespace("myns","urn:/myspace");
> > > > // Default Namespace
> > > > then query
> > > >
> XPathContext.selectNodes("//myns:ElementB");
> > >
> > > Joe: this is as it should be. See
> > > https://issues.apache.org/jira/browse/JXPATH-61
> > for
> > > a
> > > LENGTHY discussion.
> > >
> > > >
> > > > 2. The next problem is that I thought if I
> > > register
> > > > namespaces e.g.
> > > > JXPathContext.registerNamespace();
> > > > Then I would not have to worry about the
> > document
> > > > not having them. However when I call
> > > >
> > > >
> JXPathContext.registerNamespace("A","http://A");
> > > >
> > >
> >
>
JXPathContext.createPathAndSetValue("ElementA[1]/@A:mystuff,"value");
> > > >
> > > > For the following
> > > >
> > > > <ElementA xmlns="urn:/myspace">
> > > > <ElementB A:mystuff="junk">MY
> > > VALUE</ElementB>
> > > > </ElementA>
> > > >
> > > > I get an exception thrown saying A
> > > >
> > > >
> > >
> >
>
org.apache.common.ri.model.dom.DOMNodePointer.createAttribute
> > > > unknown namespace prefix: A
> > > >
> > >
> > > It is my understanding that I have fixed this
> > issue
> > > this afternoon in svn trunk. If you can verify
> > > this,
> > > I'd appreciate it.
> > >
> > > > HELP!
> > >
> > > If you don't mind some helpful advice in the way
> > of
> > > protocol, all-caps shouts of "HELP" will
> generally
> > > not
> > > help your cause. This subject, among others, is
> > > covered in the document
> > >
> http://www.catb.org/~esr/faqs/smart-questions.html
> > .
> > >
> > > Regards,
> > > Matt
> > >
> > > >
> > > > -----Original Message-----
> > > > From: Matt Benson
> [mailto:gudnabrsam@yahoo.com]
> > > > Sent: Wednesday, July 25, 2007 3:48 PM
> > > > To: Jakarta Commons Users List
> > > > Subject: RE: Problem with JXPath 1.3 -
> > Registering
> > > > Namespaces
> > > >
> > > >
> > > >
> > > > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> > > >
> > > > > I have an instance with a default namespace
> > > > however
> > > > > I cannot get any results from a
> selectNodes()
> > > > call.
> > > > > However if I register a
> > namespaceNamespace("A",
> > > > > "http://A/") with the Default namespace the
> > > query
> > > > > works e.g.
> > > > > JXpathContext.selectNodes(//A:Element)
> > > > > but if I did not register the namespace and
> > try
> > > to
> > > > > run the query as
> > > > > JXpathContext.selectNodes(//Element) I get
> no
> > > > > Results.
> > > > >
> > > > > HELP!!!!!!!!!!!!!!!!
> > > >
> > > > Whoa... calm down! :) I can't follow all
> that.
> >
> > > > Give
> > > > me a breakdown of exactly how to evoke the
> > > > (mis-)behavior you're seeing. Also, note that
> > in
> > > a
> > > > few minutes' time I'll be committing what is
> > > > intended
> > > > to fix your problems with
> > createPathAndSetValue()
> > > > for
> > > > externally-registered namespaced attributes.
> > > >
> > > > -Matt
> > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: Mcduffey, Joe [mailto:jdmcduf@nsa.gov]
> > > > > Sent: Wednesday, July 25, 2007 11:37 AM
> > > > > To: Jakarta Commons Users List
> > > > > Subject: RE: Problem with JXPath 1.3 -
> > > Registering
> > > > > Namespaces
> > > > >
> > > > >
> > > > > Having a problem after registering a
> namespace
> > > as
> > > > in
> > > > > your example then executing the following:
> > > > > -
> > createPathAndSetValue(element/@A:attribute);
> > > > >
> > > > > -----Original Message-----
> > > > > From: Matt Benson
> > [mailto:gudnabrsam@yahoo.com]
> > > > > Sent: Wednesday, July 25, 2007 11:15 AM
> > > > > To: Jakarta Commons Users List
> > > > > Subject: RE: Problem with JXPath 1.3 -
> > > Registering
> > > > > Namespaces
> > > > >
> > > > >
> > > > > Joe: Did you test Sergey's patch or the
> > latest
> > > > 1.3
> > > > > trunk as of Tuesday afternoon/evening? As
> of
> > > that
> > > > > time the svn trunk version worked for me
> > against
> > > > > your
> > > > > submitted example. If not, please attach
> more
> > > > code
> > > > > which shows how to break the current ns
> > handling
> > > > and
> > > > > reopen JXPATH-97 in JIRA. I'm trying to get
> > all
> > > > > bugs
> > > > > resolved for a 1.3 release and this
> definitely
> > > > > sounds
> > > > > like something we want to have working
> > properly.
> > > > >
> > > > > Thanks,
> > > > > Matt
> > > > >
> > > > >
> > > > > --- "Mcduffey, Joe" <jd...@nsa.gov> wrote:
> > > > >
> > > > > > This still doesn't work properly see
> > previous
> > > > > > message from 7/20/07...
> > > > > >
> > > > > > ------------------ FROM PREVIOUS MESSAGE
> > > > > > ------------------
> > > > > > After registering Namespaces in JXPath 1.3
> > and
> > > > > then
> > > > > > calling
> > > > > >
> > JXPathContext.createPathAndSetValue(key,value)
> > > > > > I get an exception
> > > > > > Unknown namespace prefix
> > > > > >
> > > > > > However it had been successfully
> registered
> > as
> > > I
> > > > > > checked with the method call
> > > > > > JXPathContext.getPrefix();
> > > > > >
> > > > > > Any help in this area????
> > > > > > ------------------ FROM PREVIOUS MESSAGE
> > > > > > ------------------
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: Sergey Vladimirov
> > > > > [mailto:vlsergey@gmail.com]
> > > > > > Sent: Saturday, July 21, 2007 10:12 AM
> > > > > > To: Jakarta Commons Users List
> > > > > > Subject: Re: Problem with JXPath 1.3 -
> > > > Registering
> > > > > > Namespaces
> > > > > >
> > > > > >
> > > > > > Joe,
> > > > > >
> > > > > > Please, look at the following issue and
> fix
> > :)
> > > > > >
> > http://issues.apache.org/jira/browse/JXPATH-97
> > > > > >
> > > > > > --
> > > > > > Sergey
> > > > > >
> > > > > >
> > > > > > 2007/7/16, Mcduffey, Joe
> <jd...@nsa.gov>:
> > > > > > >
> > > > > > > Can someone tell me how to register
> > > namespaces
> > > > > so
> > > > > > that attributes with
> > > > > > > namespaces does not cause the exception
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
org.apache.common.ri.model.dom.DOMNodePointer.createAttribute
> > > > > > > unknown namespace prefix: xsi
> > > > > > >
> > > > > > > For example the following
> > > > > > > <ElementA A:myAttr="Mytype">
> > > > > > > <B:ElementB>MY VALUE</B:ElementB>
> > > > > > > </ElementA>
> > > > > > >
> > > > > > > Would result in the following exception:
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
org.apache.common.ri.model.dom.DOMNodePointer.createAttribute
> > > > > > > unknown namespace prefix: A
> > > > > > >
> > > > > > > FYI: In this example there was a
> namespace
> > > > > > decaration in the file and I
> > > > > > > also manually called the
> > > > > > > registerNamespace(A,"/http...");
> > > > > > > registerNamespace(B,"/http...");
> > > > > > >
> > > > > > > There was no problem encountered for
> > > elements.
> > > > > > Only attributes. Can
> > > > > > > someone help? Thanks.
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > Sergey Vladimirov
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
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