SAX Parser for creating (not parsing) XML document

[Naresh Agarwal]

Hi

I have been using DOM parser to create XML documents. I want to use an
alternate mechanism to create XML document as size of my XML document
is large and I don;t want the overhead of DOM (where entire tree in
constructed in memory).

Like SAX APIs for parsing XML documents, Is there any thing like SAX
parser/APIs for creating XML documents?

Is there any other standard mechanism of creating XML document,
without requiring the entire tree structure to be constructed in
memory?

Thanks,
Naresh

[Martin Honnen]

Naresh Agarwal wrote:
> Hi
>
> I have been using DOM parser to create XML documents. I want to use an
> alternate mechanism to create XML document as size of my XML document
> is large and I don;t want the overhead of DOM (where entire tree in
> constructed in memory).
>
> Like SAX APIs for parsing XML documents, Is there any thing like SAX
> parser/APIs for creating XML documents?

Java 6 has XMLStreamWriter
http://www.java2s.com/Tutorial/Java/0440__XML/UsingXMLStreamWritertocreateXMLfile.htm

--

Martin Honnen
http://JavaScript.FAQTs.com/

[Naresh Agarwal]

On Jul 21, 4:09 pm, Martin Honnen <mahotr...@yahoo.de> wrote:
> Naresh Agarwal wrote:
> > Hi
>
> > I have been using DOM parser to create XML documents. I want to use an
> > alternate mechanism to create XML document as size of my XML document
> > is large and I don;t want the overhead of DOM (where entire tree in
> > constructed in memory).
>
> > Like SAX APIs for parsing XML documents, Is there any thing like SAX
> > parser/APIs for creating XML documents?
>

> Java 6 has XMLStreamWriterhttp://www.java2s.com/Tutorial/Java/0440__XML/UsingXMLStreamWritertoc...

>
> --
>
> Martin Honnen
> http://JavaScript.FAQTs.com/

Thanks. Is there any thing available for this with Java 1.5, any open
source app?

Best
Naresh

[Stanimir Stamenkov]

Mon, 21 Jul 2008 21:46:42 -0700 (PDT), /Naresh Agarwal/:

> On Jul 21, 4:09 pm, Martin Honnen <mahotr...@yahoo.de> wrote:
>
>> Java 6 has XMLStreamWriterhttp://www.java2s.com/Tutorial/Java/0440__XML/UsingXMLStreamWritertoc...
>

> Thanks. Is there any thing available for this with Java 1.5, any open
> source app?

<http://en.wikipedia.org/wiki/StAX> lists three implementations:

> * http://stax.codehaus.org/ Reference Implementation
> * Woodstox Open source StAX implementation
> * https://sjsxp.dev.java.net is Sun's Stax implementation

--
Stanimir

[Tony Lavinio]

Stefan Ram wrote:
> Martin Honnen <maho...@yahoo.de> writes:
>> Java 6 has XMLStreamWriter
>
> Often, people use »tag« for »element«.
>
> Here, it seems to be the other way round:
>
> xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "a");
> xtw.writeAttribute("href", "http://www.java2s.com");
> xtw.writeCharacters("here");
> xtw.writeEndElement();
>
> . It seems as »writeEndElement« is supposed
> to write the end /tag/, i.e., "</a>".
>
> So, more correct names to me would be:
>
> »writeEndTag()«,
> »writeEndOfElement()«, or
> »writeElementEnding()«.

You're not writing tags with this, you're writing /events/.

So writeStartElement means you are sending the StartElement
/event/ into the stream. writeEndElement means you are
sending the EndElement /event/ into the stream.

When using XMLStreamWriter, you must remember that you are
acting as the parser.

--
Tony Lavinio <> DataDirect <> Stylus Studio XML <> alav...@progress.com
XQuery, XSLT, XML Schema and EDI Toolset <> http://www.stylusstudio.com/
<> There is no problem that brute force and ignorance cannot overcome <>

[Stanimir Stamenkov]

22 Jul 2008 16:31:54 GMT, /Stefan Ram/:

> Another way to write XML with pre-1.6-Java:
>
> com.sun.org.apache.xml.internal.serialize.XMLSerializer serializer =
> new com.sun.org.apache.xml.internal.serialize.XMLSerializer
> ( fileOutputStream, outputFormat);
> serializer.startDocument();
> { serializer.startElement("", "example", "example",
> new com.sun.org.apache.xml.internal.serializer.
> AttributesImplSerializer() );
> { final char[] data = "test text" . toCharArray();
> serializer.characters( data, 0, data.length );
> serializer.endElement( "", "example", "example" ); }
> serializer.endDocument(); }}}

Here's more standard way of doing it without requiring
implementation specific classes (works with Java 1.4):

http://mail-archives.apache.org/mod_mbox/xml-xalan-j-users/200801.mbox/%3c4797292...@netscape.net%3e

--
Stanimir

[Philippe Poulard]

Stefan Ram a écrit :

> Naresh Agarwal <naresh....@gmail.com> writes:
>> Is there any thing available for this with Java 1.5, any open
>> source app?
>

> Writing XML is simpler than reading XML.
>
> So, sometimes, one can get by with no library at all:
>
> outStream.print( "<" );
> outStream.print( type );
> outStream.print( ">" );
>

hi,

IMHO, this is one of the worst practice

outStream.print( "<" );
outStream.print( type );
outStream.print( ">" );
outStream.print( "if (a<b ) {}" );

you'll have too many occasions to break your XML result ; rely on tools
made for that purpose that will produce well-formed XML

you can also use templates for creating SAX documents with RefleX :
http://reflex.gforge.inria.fr/tips.html#createFromScratch
of course, you can loop on whatever you want to create content (merge
thousand XML files for example:
http://reflex.gforge.inria.fr/tips.html#parsingFragments )

then pipe the created doc to an XSLT serializer :
http://reflex.gforge.inria.fr/tips.html#xsltSerialization

you can use it from the command line, embed it in a program, or deploy
it within a web server

tutorials are available here :
http://reflex.gforge.inria.fr/tutorial.html

I will talk about all that stuff at Balisage 2008 in Montreal, with a
focus on schema languages
http://www.balisage.net/Program.html#h245p

--
Cordialement,

///
(. .)
--------ooO--(_)--Ooo--------
| Philippe Poulard |
-----------------------------
http://reflex.gforge.inria.fr/
Have the RefleX !