Enhancement Request – Incrementing a Flexfield Value on Asset Split

I would like to enhance the standard asset split functionality in Oracle Fusion by adding custom logic. Specifically, I need to increment a descriptive flexfield (DFF) value each time an asset line is split.

Currently, the split functionality is controlled by the following security expression:

#{securityContext.userGrantedPermission['permissionClass=oracle.adf.share.security.authorization.MethodPermission;target=FA_SPLIT_FIXED_ASSET_COST_SOURCE_LINE_PERMISSION;action=invoke']}

However, I need to implement additional logic that:

1. Triggers when the user clicks the "Split" action in the UI.
2. Retrieves a user-defined number from a DFF in the original asset line.
3. Increments this value by