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Posted to general@xml.apache.org by Robert Koberg <ro...@koberg.com> on 2001/07/26 18:14:25 UTC
help - java - Basic DOM parse
I must be missing something very basic about DOM parsing.
Here is an excerpt of the java code:
DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docbuilder = dfactory.newDocumentBuilder();
Document doc = docbuilder.parse(this_config);
context.setAttribute("boo1", this_config);
context.setAttribute("boo2", doc);
The output indicates the correct file (with or without the file:///) if I
check it in the filesystem, but doc is always null. dfactory, docbuilder
all show that they have been created. The xml file is well-formed.
thanks for any help,
Rob
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xalan d7 build bug? was - Re: help - java - Basic DOM parse
Posted by Robert Koberg <ro...@koberg.com>.
I failed to mention I am using Xalan (D7). In the documentation (that says
D6 at the top) it states:
---------------------
The Java API for XML Processing interfaces enable you to isolate your
application from the internal implementation details of a given Transformer,
SAX parser, or DOM parser. For each of these objects, there is an abstract
Factory class with a static newInstance() method that instantiates a
concrete Factory which wraps the underlying implementation. These
newInstance() methods use system property settings to determine which
implementation to instantiate.
Xalan-Java is distributed with system property settings for the Xalan XSLT
Transformer and the Xerces DOM and SAX parsers. These settings are in
xalan.jar in META-INF/services (see src/META-INF/services).
System property Setting
javax.xml.transform.TransformerFactory
org.apache.xalan.processor.TransformerFactoryImpl
javax.xml.parsers.DocumentBuilderFactory
org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
javax.xml.parsers.SAXParserFactory
org.apache.xerces.jaxp.SAXParserFactoryImpl
-------------------------------
But when I look in the xalan.jar there is only:
javax.xml.transform.TransformerFactory
org.apache.xalan.processor.TransformerFactoryImpl
----- Original Message -----
From: "Robert Koberg" <ro...@koberg.com>
To: <ge...@xml.apache.org>
Sent: Thursday, July 26, 2001 9:14 AM
Subject: help - java - Basic DOM parse
> I must be missing something very basic about DOM parsing.
>
> Here is an excerpt of the java code:
>
> DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
> DocumentBuilder docbuilder = dfactory.newDocumentBuilder();
> Document doc = docbuilder.parse(this_config);
>
> context.setAttribute("boo1", this_config);
> context.setAttribute("boo2", doc);
>
> The output indicates the correct file (with or without the file:///) if I
> check it in the filesystem, but doc is always null. dfactory, docbuilder
> all show that they have been created. The xml file is well-formed.
>
> thanks for any help,
> Rob
>
>
> ---------------------------------------------------------------------
> In case of troubles, e-mail: webmaster@xml.apache.org
> To unsubscribe, e-mail: general-unsubscribe@xml.apache.org
> For additional commands, e-mail: general-help@xml.apache.org
>
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Re: help - java - Basic DOM parse
Posted by Robert Koberg <ro...@koberg.com>.
thanks for responding, I will try to be clearer:
> Sorry, I don't understand the question. What is "this_config"
it is an uri or an InputStream (or others, I have tried several)
Document doc = docbuilder.parse(this_config);
-- but it an XML document that describes the particular site in it's
context
> "context" in the code above
sorry. context is:
// in the servlet's init (actually a startup servlet)
ServletContext context = getServletConfig().getServletContext();
> and what is the problem you are trying to
> solve?
I want to be able to put the parsed doc in a context attribute to access it
in other parts of this (or a master) webapp:
context.setAttribute("boo2", doc);
I know I have the doc in the class that sets the attribute because I can
perform XPath expressions on it using the XPathAPI. But I can't put doc
into the attribute - it always turns up null. I am pretty sure I won't end
up doing this, but I just wanted to see if the performance is acceptable for
the convenience the DOM offers.
----- Original Message -----
From: "Edwin Goei" <ed...@sun.com>
To: <ge...@xml.apache.org>
Sent: Thursday, July 26, 2001 11:03 AM
Subject: Re: help - java - Basic DOM parse
> Robert Koberg wrote:
> >
> > I must be missing something very basic about DOM parsing.
> >
> > Here is an excerpt of the java code:
> >
> > DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
> > DocumentBuilder docbuilder = dfactory.newDocumentBuilder();
> > Document doc = docbuilder.parse(this_config);
> >
> > context.setAttribute("boo1", this_config);
> > context.setAttribute("boo2", doc);
> >
> > The output indicates the correct file (with or without the file:///) if
I
> > check it in the filesystem, but doc is always null. dfactory,
docbuilder
> > all show that they have been created. The xml file is well-formed.
>
> Sorry, I don't understand the question. What is "this_config" and
> "context" in the code above and what is the problem you are trying to
> solve?
>
> -Edwin
>
> ---------------------------------------------------------------------
> In case of troubles, e-mail: webmaster@xml.apache.org
> To unsubscribe, e-mail: general-unsubscribe@xml.apache.org
> For additional commands, e-mail: general-help@xml.apache.org
>
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Re: help - java - Basic DOM parse
Posted by Edwin Goei <ed...@sun.com>.
Robert Koberg wrote:
>
> I must be missing something very basic about DOM parsing.
>
> Here is an excerpt of the java code:
>
> DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
> DocumentBuilder docbuilder = dfactory.newDocumentBuilder();
> Document doc = docbuilder.parse(this_config);
>
> context.setAttribute("boo1", this_config);
> context.setAttribute("boo2", doc);
>
> The output indicates the correct file (with or without the file:///) if I
> check it in the filesystem, but doc is always null. dfactory, docbuilder
> all show that they have been created. The xml file is well-formed.
Sorry, I don't understand the question. What is "this_config" and
"context" in the code above and what is the problem you are trying to
solve?
-Edwin
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