[Jpos-devel] Packager Problem??

[Bharavi G. <bha...@ma...>]

Hi All,

I am facing few problems when I tried to implement
CustomSubFieldPackager(Subclass of GenericPackager).I want to tell Some of
my observation before I describe about the problem later.

Observation 1:
===============

When I excute my test program I got wrong result, But BasePacker failed to
report errors occured.
i.e
In ISOBasePackager.java

in functiom  public byte[] pack (ISOComponent m) throws ISOException {

we have few catch() blocks like this:
         catch (Exception e) {
			evt.addMessage ("error packing field "+i);
			evt.addMessage (c);
			evt.addMessage (e);
		    }

Because it is not throwing any ISOException, My program runs very smooth:)
But getting wrong results.

Observation 2:
================
I wrote a small test program
	    ISOMsg inner  = new ISOMsg ("0800");
	    inner.set (new ISOField (3,"000000"));
		GenericPackager p = new GenericPackager("iso93binary.xml");
		//inner.setPackager(p);
		byte[] dd=inner.pack();

Result 1: with packager set
===========
<log realm="Test" at="Fri Oct 12 12:42:38 IST 2001.750">
  <Test>
    <isomsg>
      <field id="0" value="0800"/>
      <field id="3" value="000000"/>
    </isomsg>
  </Test>
</log>

Result 2: No Packager set
==========
Exception in thread "main" java.lang.NullPointerException
        at org.jpos.iso.ISOMsg.pack(ISOMsg.java:292)
        at TestTLV.testNested(TestTLV.java:101)
        at TestTLV.main(TestTLV.java:139)

============================================================================
==========
Coming to my problem, I wrote a ICCField55Packager by subclassing
GenericPackager(Same as GenericSubFieldPackager.java)

Then I modified iso93binary.xml to add subfield packager for field55(same as
europackager.xml)

Then I created a innerMsg for field 55 and added to main ISOMsg by calling
m.set(inner);
          ISOMsg inner  = new ISOMsg (55);
	    inner.set (new ISOField (1,"001022"));
 	    inner.set (new ISOField (2,"013433"));
 	    inner.set (new ISOField (3,"020300"));

When I am calling m.pack() it is giving NullPointer exception in
BasePackager.pack() and was ignored as I explained in my observations.

I also Checked GenericPackager and It is parsing xml file well including
SubFieldPacker values.
But, I am clue less about How SubFieldPackager are set for inner ISOMsgs.


regards,
Bharavi