JAVA Mapping

Hi,

I am new in java mapping.

I want to do a file to proxy scenario , where 2 different types of xml files (only difference of 2 tags)will come. Files are as follow -

File 1 :

<?xml version="1.0" standalone="yes" ?>

<ns0:DTRDeltaChange xmlns:ns0="urn:ne.rapdrp.gis.DTRDeltachange">

<DocumentElement>

<DELTA_CHANGE_IN_NETWORK_TABLE>

  <ASSET>CHANGE</ASSET>

  <ASSET_TYPE>DTR</ASSET_TYPE>

  <NETWORK_TYPE>RADIAL</NETWORK_TYPE>

  <ASSET_CHANGE_DATE />

  <SSID>7208028101</SSID>

  <FEEDERID>ITI 11 KV</FEEDERID>

  <DTRID>128150000000000006</DTRID>

  <DTR_LONG_CODE>7208028006</DTR_LONG_CODE>

  <VOLTAGE_LEVEL />

  <LOCATION_CODE>ETDC</LOCATION_CODE>

  <METER_NUMBER />

  <PROCESS_FLAG>N</PROCESS_FLAG>

  <DISCOM>2</DISCOM>

</DELTA_CHANGE_IN_NETWORK_TABLE>

</DocumentElement>

</ns0:DTRDeltaChange>

File 2 :

<?xml version="1.0" standalone="yes" ?>

<ns0:MeterDeltaChange xmlns:ns0="urn:ne.rapdrp.gis.MeterDeltachange">

<DocumentElement>

<DELTA_CHANGE_IN_NETWORK_TABLE>

  <ASSET>CHANGE</ASSET>

  <ASSET_TYPE>METER</ASSET_TYPE>

  <NETWORK_TYPE>RADIAL</NETWORK_TYPE>

  <ASSET_CHANGE_DATE />

  <SSID />

  <FEEDERID />

  <DTRID>128150000000000006</DTRID>

  <DTR_LONG_CODE />

  <VOLTAGE_LEVEL />

  <LOCATION_CODE />

  <OLD_METER_NUMBER>TSE 01854</OLD_METER_NUMBER>

  <NEW_METER_NUMBER>TSE 01854</NEW_METER_NUMBER>

  <PROCESS_FLAG>N</PROCESS_FLAG>

  <DISCOM>2</DISCOM>

</DELTA_CHANGE_IN_NETWORK_TABLE>

</DocumentElement>

</ns0:MeterDeltaChange>

I want to do a java mapping which will check whether <ASSET_TYPE> field value is DTR or METER and accordingly it will create the corresponding target xml.

Please tell me what have to be created (i.e: data type message type etc) on sender and receiver side and what will be exact java code.

Thanks,

Apu