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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 09:34:43 +0100

  Ah, I see you probably wanted Java serialization rather than XML 
serialization. Perhaps.

Michael Kay
Saxonica

On 08/10/2010 9:14 AM, Michael Kay wrote:
>  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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>
>
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• References:
  • [Java] Serializing StAX Events
    • From: "Johannes.Lichtenberger" <Johannes.Lichtenberger@uni-konstanz.de>
  • Re: [Java] Serializing StAX Events
    • From: Michael Kay <mike@saxonica.com>