File receiver - Get file size

Hi all,
In my scenario, the message mapping is such that the target message may or may not have child nodes created depending on certain conditions. I am using file receiver channel to write this target message as xml file on another server.
The issue I am facing is - suppose child nodes are not created, the target message has only root node, and nothing else. i.e. it is empty.
But still the file gets written on destination, because file adapter doesn't seem to have intelligence to look into the payload. So I have to manually delete such 'almost-empty' files.
Although PI 7.0 has feature of ignoring empty files, the file I am talking of is really not of 0 kb size, as it contains namespace and root node tag. It has very small size of 1 kb, this is fixed and thus the file is easily distinguished from other larger files which contain child nodes. File size is a parameter that can be certainly used as a key here, but don't know how.
Does anyone have any idea on -
1) How to check file size before file receiver adapter writes it,
2) How to prevent such file from getting written, or
3) run a script which can detect the file size and delete them periodically / or every time file receiver writes files ?
Regards,
- Shankar.

Hi,
We have an option of empty file handling in receiver file adapter..
<i>      Select the Handling of Empty Messages:       Write Empty File
An empty file (length 0 bytes) is put in the target directory.
       Ignore No file is put in the target directory.</i>
But your case namespace and root node only are available you said.
In this type of situations ..
We can handle in the following way..
If target side root node having the recordset node
root
  recordset 0..unbound
     child1 0.1
     child2   0.1
Then create a UDF
map from left side one node -
exists --- UDF ---to right side root node
In UDF
//handle business logic and
....ResultList.SUPPRESS.
if your target side does not have any recordset type of structure then..
In messages tab change the occurrences of msg to 0..unbound and use the above UDF.
Regards
Chilla..

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