Before we started looking at axiom, we created a class called StringDom
that extends the w3c dom classes. Each time an appendChild is called,
this dom implementation writes the child to an outputstream/writer. That
way, when we are building a large dom, the elements are not actually
stored in memory but are directly flushed to the outputstream/writer. Of
course, the disadvantage of this technique is that the dom elements must
be appended in the exact order they will be written to output. My
question is whether axiom allows the same kind of absolutely direct
serialization when a child is appended to a parent? If so, how do I do it?
Thanks,
Tammy
Punnoose, Roshan wrote:
Tammy,
I'm not exactly sure what you are trying to do... But the
serialzeAndConsume(...) should not hold it the element in memory.
Check the implementation of the Writer, and also check if the
serialize(...) method will work.
If none of this works, then what version of axis/axiom are you using?
Roshan Punnoose
Phone: 301-497-6039
-----Original Message-----
From: Tammy Dugan [mailto:[EMAIL PROTECTED]
Sent: Wednesday, March 14, 2007 2:55 PM
To: [email protected]
Subject: [AXIOM] How to serialize axiom document without building
objects in memory
I have the following code:
new Thread(new ReadDeferred(writer, (OMElement)
returnData.createRawDataOutputFromTable(doc,
inputDatasetId,
outputDatasetId, type, false)
)).start();
;
writer.close();
class ReadDeferred
implements Runnable
{
Writer writer = null;
OMElement topElement = null;
public ReadDeferred(Writer writer, OMElement topElement)
{
this.writer = writer;
this.topElement = topElement;
}
public void run()
{
try
{
topElement.serializeAndConsume(writer);
}
catch (Exception ex)
{
InitializationServlet.error("", ex);
}
}
}
I am trying to flush the output of createRawDataOutputFromTable directly
to a file without creating a dom tree. The createRawDataOutputFromTable
method builds an OMDocument using a series of append child statements.
The above code still holds the whole dom tree in memory before it writes
to a file. Is there a way I can prevent this? I essentially want every
appendChild to write the child to the file.
Tammy
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Tammy Dugan
Computer Programmer
Regenstrief Institute, Inc.
1050 Wishard Blvd., RG5
Indianapolis, IN 46202
(317) 630 - 7346
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