F104 Dynamic Length

[Ankur Yadav]

We have a requirement that F104 length can be 1 byte or 2 byte. while packaging/unpackaging, on the basis of first two digit, we can figure out the length of F104. BinaryPrefixer class in jpos library able to calculate the length of this field.

Please suggest some solutions.

For 1 byte length, it's definition will be:

<isofield
id="104"
length="255"
name="TRANSACTION DESCRIPTION"
class="org.jpos.iso.IFB_LLHBINARY"/>

<isofield 

for 2 byte length, it's definition will be:

<isofield
id="104"
length="1600"
name="TRANSACTION DESCRIPTION"
class="org.jpos.iso.IFB_LLLHBINARY"/>

<isofield 

[murtuza chhil]

See if you can extend your channel to extend BaseChannel's getDynamicPackager

https://github.com/jpos/jPOS/blob/master/jpos/src/main/java/org/jpos/iso/BaseChannel.java#L745

Override https://github.com/jpos/jPOS/blob/096227e42b3edd63a4187eba48da145630dc502d/jpos/src/main/java/org/jpos/iso/BaseChannel.java#L474-L476

and you can try both packagers, one will probably throw an exception , return the correct packager from there.

-chhil