servingxml-help

[Servingxml-help] Writing to a buffer

[Ravikumar T. <ra...@gm...>]

Hi

I am converting a large flat file to xml using servingXml. I am trying to
write the xml to a buffer instead of a physical file. After certain number
of lines/records are transformed to xml, I am planning to invoke a listener
or trigger which would consume/process the xml generated so far and return
control so that the next set of records are converted. I am considering the
following approach:

Write a record filter and maintain a count of records. After the desired
number of records are written, I notify a listener which can process the xml
produced so far. I see an issue with this. The writeRecord method doesnot
tell me if I am at the end of the file. So I wouldnot know when to fire the
listener for the last set of records.  Please let me know if this approach
can be followed.

Regarding writing to a buffer, I would like to use a java.io.StringWriter so
that I can read from it. But OutputStreamSinkAdaptor doesnot take a
java.io.Writer as a parameter to the constructor. It would only take an
OutputStream. Is there any other way I can write to a buffer which can also
be read and cleared while the xml transformation is in progress.

Regards
Ravi

Re: [Servingxml-help] Writing to a buffer

[Daniel P. <dan...@sy...>]

You can override the endRecordStream method of RecordFilter to be =
notified of when the last record is received.  Just call =
super.endRecordStream before returning from your method.

Your other question is really a Java question, but you can use =
java.io.ByteArrayOutputStream in much the same way as you were thinking =
about using a StringWriter.

Daniel
  ----- Original Message -----=20
  From: Ravikumar Tadysetty=20
  To: ser...@li...=20
  Sent: Wednesday, March 28, 2007 8:49 PM
  Subject: [Servingxml-help] Writing to a buffer


  Hi

  I am converting a large flat file to xml using servingXml. I am trying =
to write the xml to a buffer instead of a physical file. After certain =
number of lines/records are transformed to xml, I am planning to invoke =
a listener or trigger which would consume/process the xml generated so =
far and return control so that the next set of records are converted. I =
am considering the following approach:=20

  Write a record filter and maintain a count of records. After the =
desired number of records are written, I notify a listener which can =
process the xml produced so far. I see an issue with this. The =
writeRecord method doesnot tell me if I am at the end of the file. So I =
wouldnot know when to fire the listener for the last set of records.  =
Please let me know if this approach can be followed.=20

  Regarding writing to a buffer, I would like to use a =
java.io.StringWriter so that I can read from it. But =
OutputStreamSinkAdaptor doesnot take a java.io.Writer as a parameter to =
the constructor. It would only take an OutputStream. Is there any other =
way I can write to a buffer which can also be read and cleared while the =
xml transformation is in progress.=20

  Regards
  Ravi



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