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Re: [Java] Serializing StAX Events

• From: Michael Kay <mike@saxonica.com>
• To: xml-dev@lists.xml.org
• Date: Fri, 08 Oct 2010 09:14:40 +0100

  Looks something like this

http://tutorials.jenkov.com/java-xml/stax-xmleventwriter.html

If you want a String at the end, just use a StringWriter as you Writer. 
If you really want a StringBuilder rather than a String, you may have to 
write your own Writer, but that seems easy enough.

(Saxon 9.3 adds a StAX writing interface to allow you to write 
programmatically to the Saxon serializer, with full control of all the 
serialization parameters, but that's not released yet).

Michael Kay
Saxonica


On 08/10/2010 12:22 AM, Johannes.Lichtenberger wrote:
> Hello,
>
> I wonder if any class/method is available to write
> String-representations of XMLEvents to a StringBuilder or something like
> that (I don't think toString() fits as I want to get a real XML-String),
> assuming mValue is a StringBuilder:
>
> while (paramReader.hasNext()&&  !paramFilter.accept(paramReader.peek())) {
>    final XMLEvent event = paramReader.nextEvent();
>
>    if (isTimestamp&&  event.isCharacters()&&
> !event.asCharacters().isWhiteSpace()) {
>      isTimestamp = false;
>      try {
>        // Parse timestamp.
>        final String text = event.asCharacters().getData();
>        final String[] splitted = text.split("T");
>        final String time = splitted[1].substring(0, splitted[1].length()-1);
>        mKey.setTimestamp(formatter.parse(splitted[0] + " " + time));
>      } catch (final ParseException e) {
>        LOGWRAPPER.warn(e.getMessage(), e);
>      }
>    }
>
>    if (paramIsRecord) {
>      // Parser currently is located somewhere after the start of a record
> (inside a record).
>      mValue.append(event.toString());
>
>      if (event.isStartElement()&&
> mDate.equals(event.asStartElement().getName())) {
>        isTimestamp = true;
>      }
>    }
> }
>
> Another possibility would be to add the XMLEvents to a List, but then I
> assume that currently no serialization/deserialization of XMLEvents exists!?
>
> My task is still to write an Hadoop-Application and I'm either using
> Text / String-Representation of XML fragments as the value of a
> mapreduce task or I'm using a List of XMLEvents, which implement
> Writable and therefore are serializable/deserializable.
>
> regards,
> Johannes
>
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• Follow-Ups:
  • Re: [Java] Serializing StAX Events
    • From: Michael Kay <mike@saxonica.com>

• References:
  • [Java] Serializing StAX Events
    • From: "Johannes.Lichtenberger" <Johannes.Lichtenberger@uni-konstanz.de>