extracting employee data from sap hr and downloading at application server

requirement is of an outbound interface for sap abap hr..

where data is to be extracted from sap hr and have to download at application server to be send to other system.

This interface extracts data from SAP HR and produces an output file at application server. which is sent to the SOME OTHER SYSTEM. The process is run with changes only on a weekly basis and a full file on a quarterly basis.

The current functionality of this interface is to send a file to some other system to update the participants’ eligibility information for savings plan. Any personnel having a 401K enrollment (waiver, participating or suspended) or having a balance in a 401K plan account at otehr system will be extracted from SAP HR.

Participants will remain on the eligibility file until JP Morgan notifies that the participant has closed their account.

This file contains the participants’ demographic information such as (but not limited to) name, address, hire date, pay frequency, and status, and plan enrollment changes. JP Morgan uses this data to administer each participant’s account

these are the steps/pseudocode:-

   Step 1: Select all participants from IT0169 where plan type is 401K with ENDDA = 99991231.

   Step 2: Populate the required fields on the output file from IT0169 and plan type 401K.

   Step 3: If the above conditions are valid, information from the following infotypes are extracted for the selected PERNR:

•   Select current data from IT0000 based on PERNR.
•   Select current data from IT0001 based on PERNR.
•   Select current data from IT0002 based on PERNR.
•   Select current data from IT0006 based on PERNR and subtype = ‘1’.
•   Select current data from IT0008 based on PERNR.
•   Select current data (adjusted service date, pension service date and vesting pension date) from IT0041 based on PERNR.

   Step 4: Generate output file into flat file for JP Morgan.

   Step 5: Send the extracted file to UNIX and/or network.

need the code for these steps.

give me a basic sample code for these steps.

iam new to abap hr, kindly help.

or kindly suggest where can i find the coding if any business requirement comes.