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Posted to j-users@xerces.apache.org by Ramon F Herrera <ra...@patriot.net> on 2010/04/13 01:53:54 UTC
Looking for a simple, XPath-like way to retrieve values from XML
files
Hello,
My current application runs on C++ and has many lines like this:
Variable["user"] = xpath_of("//root/creator/user");
Variable["project"] = xpath_of("//root/creator/project");
Variable["projectpath"] = xpath_of("//root/creator/projectpath");
Variable["title"] = xpath_of("//root/creator/title");
Variable["notes"] = xpath_of("//root/creator/notes");
The LHS is a Map, and the RHS is an XQilla function.
http://xqilla.sourceforge.net
Everything is working fine, but it seems that I will have to port the
application to Java. I don't expect to have any problem going from
Xerces-C to Xerces-J.
I need a simple retrieval function, though. Xerces programming is more
or less equivalent to assembly language.
Can you folks recommend some XPath -or equivalent- implementation that
runs on Java?
TIA,
-Ramon
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Re: Looking for a simple, XPath-like way to retrieve values from XML files
Posted by Michael Glavassevich <mr...@ca.ibm.com>.
Hi,
JAXP has an XPath API. It is supported by Xalan and Java 5+. Here's a
reference [1] to the Javadocs.
Thanks.
[1]
http://xerces.apache.org/xerces2-j/javadocs/api/javax/xml/xpath/package-summary.html
Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org
Ramon F Herrera <ra...@patriot.net> wrote on 04/12/2010 07:53:54 PM:
> Hello,
>
> My current application runs on C++ and has many lines like this:
>
>
> Variable["user"] = xpath_of("//root/creator/user");
> Variable["project"] = xpath_of("//root/creator/project");
> Variable["projectpath"] = xpath_of("//root/creator/projectpath");
> Variable["title"] = xpath_of("//root/creator/title");
> Variable["notes"] = xpath_of("//root/creator/notes");
>
> The LHS is a Map, and the RHS is an XQilla function.
>
> http://xqilla.sourceforge.net
>
> Everything is working fine, but it seems that I will have to port the
> application to Java. I don't expect to have any problem going from
> Xerces-C to Xerces-J.
>
> I need a simple retrieval function, though. Xerces programming is more
> or less equivalent to assembly language.
>
> Can you folks recommend some XPath -or equivalent- implementation that
> runs on Java?
>
> TIA,
>
> -Ramon
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
> For additional commands, e-mail: j-users-help@xerces.apache.org
RE: Looking for a simple, XPath-like way to retrieve values from
XML files
Posted by John Lilley <jl...@datalever.com>.
Really its not very hard to write the equivalent of xpath_of(), given the DOM. Its probably 20 lines of code or so. Anyone have this laying about already :)
john
-----Original Message-----
From: Ramon F Herrera [mailto:ramon@patriot.net]
Sent: Monday, April 12, 2010 5:54 PM
To: c-users@xerces.apache.org
Cc: j-users@xerces.apache.org
Subject: Looking for a simple, XPath-like way to retrieve values from XML files
Hello,
My current application runs on C++ and has many lines like this:
Variable["user"] = xpath_of("//root/creator/user");
Variable["project"] = xpath_of("//root/creator/project");
Variable["projectpath"] = xpath_of("//root/creator/projectpath");
Variable["title"] = xpath_of("//root/creator/title");
Variable["notes"] = xpath_of("//root/creator/notes");
The LHS is a Map, and the RHS is an XQilla function.
http://xqilla.sourceforge.net
Everything is working fine, but it seems that I will have to port the
application to Java. I don't expect to have any problem going from
Xerces-C to Xerces-J.
I need a simple retrieval function, though. Xerces programming is more
or less equivalent to assembly language.
Can you folks recommend some XPath -or equivalent- implementation that
runs on Java?
TIA,
-Ramon
Re: Looking for a simple, XPath-like way to retrieve values from XML files
Posted by Michael Glavassevich <mr...@ca.ibm.com>.
Hi,
JAXP has an XPath API. It is supported by Xalan and Java 5+. Here's a
reference [1] to the Javadocs.
Thanks.
[1]
http://xerces.apache.org/xerces2-j/javadocs/api/javax/xml/xpath/package-summary.html
Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org
Ramon F Herrera <ra...@patriot.net> wrote on 04/12/2010 07:53:54 PM:
> Hello,
>
> My current application runs on C++ and has many lines like this:
>
>
> Variable["user"] = xpath_of("//root/creator/user");
> Variable["project"] = xpath_of("//root/creator/project");
> Variable["projectpath"] = xpath_of("//root/creator/projectpath");
> Variable["title"] = xpath_of("//root/creator/title");
> Variable["notes"] = xpath_of("//root/creator/notes");
>
> The LHS is a Map, and the RHS is an XQilla function.
>
> http://xqilla.sourceforge.net
>
> Everything is working fine, but it seems that I will have to port the
> application to Java. I don't expect to have any problem going from
> Xerces-C to Xerces-J.
>
> I need a simple retrieval function, though. Xerces programming is more
> or less equivalent to assembly language.
>
> Can you folks recommend some XPath -or equivalent- implementation that
> runs on Java?
>
> TIA,
>
> -Ramon
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
> For additional commands, e-mail: j-users-help@xerces.apache.org
Re: Looking for a simple, XPath-like way to retrieve values from XML files
Posted by Michael Glavassevich <mr...@ca.ibm.com>.
Hi Ramon,
The JAXP XPath API supports XPath 1.0 expressions [1]. Whatever sample
you're looking at is just an *example*. You're certainly not restricted to
only selecting attributes.
Thanks.
[1] http://www.w3.org/TR/xpath/
Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org
Ramon F Herrera <ra...@patriot.net> wrote on 04/13/2010 04:59:17 PM:
> Hi Michael (and other participants),
>
> Thanks so much for your recommendation.
>
> I downloaded and am experimenting with JAXP. It indeed seems to be a
> perfect match for my needs. It even comes with a very specific example,
> "XPath Demo" that I intend to use as reference.
>
> http://jaxp.dev.java.net/
>
> However, I am concerned because that code only displays attributes:
>
> /root/creator/@projectpath
>
> I wonder whether I need to modify it (how?) in order to produce other
> items, such as the all-important atomic text values?
>
> TIA,
>
> -Ramon
>
>
> On 4/12/2010 9:20 PM, Michael Glavassevich wrote:
> > Hi,
> >
> > JAXP has an XPath API. It is supported by Xalan and Java 5+. Here's a
> > reference [1] to the Javadocs.
> >
> > Thanks.
> >
> > [1]
> > http://xerces.apache.org/xerces2-j/javadocs/api/javax/xml/xpath/
> package-summary.html
> >
> > Michael Glavassevich
> > XML Parser Development
> > IBM Toronto Lab
> > E-mail: mrglavas@ca.ibm.com
> > E-mail: mrglavas@apache.org
> >
> > Ramon F Herrera<ra...@patriot.net> wrote on 04/12/2010 07:53:54 PM:
> >
> >> Hello,
> >>
> >> My current application runs on C++ and has many lines like this:
> >>
> >>
> >> Variable["user"] = xpath_of("//root/creator/user");
> >> Variable["project"] = xpath_of("//root/creator/project");
> >> Variable["projectpath"] = xpath_of("//root/creator/projectpath");
> >> Variable["title"] = xpath_of("//root/creator/title");
> >> Variable["notes"] = xpath_of("//root/creator/notes");
> >>
> >> The LHS is a Map, and the RHS is an XQilla function.
> >>
> >> http://xqilla.sourceforge.net
> >>
> >> Everything is working fine, but it seems that I will have to port the
> >> application to Java. I don't expect to have any problem going from
> >> Xerces-C to Xerces-J.
> >>
> >> I need a simple retrieval function, though. Xerces programming is more
> >> or less equivalent to assembly language.
> >>
> >> Can you folks recommend some XPath -or equivalent- implementation that
> >> runs on Java?
> >>
> >> TIA,
> >>
> >> -Ramon
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
> >> For additional commands, e-mail: j-users-help@xerces.apache.org
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
> For additional commands, e-mail: j-users-help@xerces.apache.org
Re: Looking for a simple, XPath-like way to retrieve values from XML files
Posted by Michael Glavassevich <mr...@ca.ibm.com>.
Hi Ramon,
The JAXP XPath API supports XPath 1.0 expressions [1]. Whatever sample
you're looking at is just an *example*. You're certainly not restricted to
only selecting attributes.
Thanks.
[1] http://www.w3.org/TR/xpath/
Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org
Ramon F Herrera <ra...@patriot.net> wrote on 04/13/2010 04:59:17 PM:
> Hi Michael (and other participants),
>
> Thanks so much for your recommendation.
>
> I downloaded and am experimenting with JAXP. It indeed seems to be a
> perfect match for my needs. It even comes with a very specific example,
> "XPath Demo" that I intend to use as reference.
>
> http://jaxp.dev.java.net/
>
> However, I am concerned because that code only displays attributes:
>
> /root/creator/@projectpath
>
> I wonder whether I need to modify it (how?) in order to produce other
> items, such as the all-important atomic text values?
>
> TIA,
>
> -Ramon
>
>
> On 4/12/2010 9:20 PM, Michael Glavassevich wrote:
> > Hi,
> >
> > JAXP has an XPath API. It is supported by Xalan and Java 5+. Here's a
> > reference [1] to the Javadocs.
> >
> > Thanks.
> >
> > [1]
> > http://xerces.apache.org/xerces2-j/javadocs/api/javax/xml/xpath/
> package-summary.html
> >
> > Michael Glavassevich
> > XML Parser Development
> > IBM Toronto Lab
> > E-mail: mrglavas@ca.ibm.com
> > E-mail: mrglavas@apache.org
> >
> > Ramon F Herrera<ra...@patriot.net> wrote on 04/12/2010 07:53:54 PM:
> >
> >> Hello,
> >>
> >> My current application runs on C++ and has many lines like this:
> >>
> >>
> >> Variable["user"] = xpath_of("//root/creator/user");
> >> Variable["project"] = xpath_of("//root/creator/project");
> >> Variable["projectpath"] = xpath_of("//root/creator/projectpath");
> >> Variable["title"] = xpath_of("//root/creator/title");
> >> Variable["notes"] = xpath_of("//root/creator/notes");
> >>
> >> The LHS is a Map, and the RHS is an XQilla function.
> >>
> >> http://xqilla.sourceforge.net
> >>
> >> Everything is working fine, but it seems that I will have to port the
> >> application to Java. I don't expect to have any problem going from
> >> Xerces-C to Xerces-J.
> >>
> >> I need a simple retrieval function, though. Xerces programming is more
> >> or less equivalent to assembly language.
> >>
> >> Can you folks recommend some XPath -or equivalent- implementation that
> >> runs on Java?
> >>
> >> TIA,
> >>
> >> -Ramon
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
> >> For additional commands, e-mail: j-users-help@xerces.apache.org
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
> For additional commands, e-mail: j-users-help@xerces.apache.org
Re: Looking for a simple, XPath-like way to retrieve values from
XML files
Posted by Ramon F Herrera <ra...@patriot.net>.
Hi Michael (and other participants),
Thanks so much for your recommendation.
I downloaded and am experimenting with JAXP. It indeed seems to be a
perfect match for my needs. It even comes with a very specific example,
"XPath Demo" that I intend to use as reference.
http://jaxp.dev.java.net/
However, I am concerned because that code only displays attributes:
/root/creator/@projectpath
I wonder whether I need to modify it (how?) in order to produce other
items, such as the all-important atomic text values?
TIA,
-Ramon
On 4/12/2010 9:20 PM, Michael Glavassevich wrote:
> Hi,
>
> JAXP has an XPath API. It is supported by Xalan and Java 5+. Here's a
> reference [1] to the Javadocs.
>
> Thanks.
>
> [1]
> http://xerces.apache.org/xerces2-j/javadocs/api/javax/xml/xpath/package-summary.html
>
> Michael Glavassevich
> XML Parser Development
> IBM Toronto Lab
> E-mail: mrglavas@ca.ibm.com
> E-mail: mrglavas@apache.org
>
> Ramon F Herrera<ra...@patriot.net> wrote on 04/12/2010 07:53:54 PM:
>
>> Hello,
>>
>> My current application runs on C++ and has many lines like this:
>>
>>
>> Variable["user"] = xpath_of("//root/creator/user");
>> Variable["project"] = xpath_of("//root/creator/project");
>> Variable["projectpath"] = xpath_of("//root/creator/projectpath");
>> Variable["title"] = xpath_of("//root/creator/title");
>> Variable["notes"] = xpath_of("//root/creator/notes");
>>
>> The LHS is a Map, and the RHS is an XQilla function.
>>
>> http://xqilla.sourceforge.net
>>
>> Everything is working fine, but it seems that I will have to port the
>> application to Java. I don't expect to have any problem going from
>> Xerces-C to Xerces-J.
>>
>> I need a simple retrieval function, though. Xerces programming is more
>> or less equivalent to assembly language.
>>
>> Can you folks recommend some XPath -or equivalent- implementation that
>> runs on Java?
>>
>> TIA,
>>
>> -Ramon
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
>> For additional commands, e-mail: j-users-help@xerces.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: j-users-unsubscribe@xerces.apache.org
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