RE: (forte-users) XMLParser-Node : Serializing parts of aDOM across par

Question

I managed to solve this problem with the help of
Sanjeev Sondur and Girish Nair from Sun.
The Solution suggested is as follows :
Whenever a node is supposed to passed as a parameter
for an inter-partition call. We have marshal and
UN-Marshalling :
- Create a new document.
- Clone the node in the context on the new document
- Append the node to the new document
- Serialize the document into a MemoryStream which is
a attribute of the object (SerializedNode) that
is passed in Lieu of a Node.
- On the other end UnMarshall by DeSeralizing the Document
and then reading the node.
Code Follows :
SerializedNode::SerializeNode(pNode);
NewDoc : document = new();
lNode : node;
if pNode <> nil then
-- This clones the node from an old document and creates it
-- in the context of the new document.
lNode = NewDoc.ImportNodeFromDocument(pNode, deep = true);
-- You can then attach to the any part of DOM (I am using
child of root)
NewDoc.appendchild(lNode);
end if;
-- _mStream is MemoryStream
mStream.Open(Framework.SPAM_WRITE, IsBinary = TRUE);
_mStream.seek(0);
_mStream.WriteSerialized(NewDoc);
_mStream.close();
On the other end I Unmarshall it
SerializedNode::GetNode()
mStream.Open(Framework.SPAM_READ, IsBinary = TRUE);
_mStream.seek(0);
NewDoc : document = (Document)(_mStream.ReadSerialized());
lNode : node = NewDoc.getFirstChild();
if lNode = NIL then
task.lgr.putline(' In GetNode : Node was NIL');
end if;
return lNode;
Note : This can use used for read-only access to parts of the DOM.
across partitions.
Thanks to all who responded.
Vivek Shetty
vivekvi-corp.com vivek.shettyLibertyMutual.com
978-884-9942 (cell) 978-750-3639 x 202 (Liberty Mutual)
-----Original Message-----
From: Shetty, Vivek [mailto:Vivek.ShettyLibertyMutual.com]
Sent: Thursday, December 21, 2000 10:04 AM
To: 'forte-userslists.xpedior.com'
Subject: (forte-users) XMLParser-Node : Serializing parts of a DOM
across partitions
I am modeling an Insurance-Policy as a XML document.
One of my requirement was to pass pieces of this Policy (Node)
to a service object for processing.
I have discovered that the Node cannot be serialized across partitions.
I can serialize the whole document using the exportDocument and send
it across the partition and import it on the other end. This is fine when
large pieces of the document have to be sent over.
When smaller pieces of this information has to sent to a service object,
I was planning to create a new document, extract the required nodes
from the old document create in the new document and send the
new document (which is a subset) across.
I am having problems extracting a node from one document and
creating it another document.
I have tried node.clonenode, document.importnodefromdocument without much
success.
I have a choice of writing a method that creates a structure in the new
document by
recursively navigating the old tree and creating new nodes in the new
document from scratch.
Have any of you faced similar situations and come up with a more elegant
solution.
Please share.
Thanks
Vivek Shetty
vivekvi-corp.com vivek.shettyLibertyMutual.com
978-884-9942 (cell) 978-750-3639 x 202 (Liberty Mutual)
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Answer 1