This method is used in SAP PI Mapping UDF to write the FileName Dynamic Configuration

setDynamicFileName.java

public boolean setDynamicFileName(String FieldValue, Container container) throws StreamTransformationException{
  boolean success = false;
  try{
    //Get the DynamicConfiguration instance
    DynamicConfiguration config = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
  
    //Define key to write in the Dynamic Configuration
    DynamicConfigurationKey key1 = DynamicConfigurationKey.create("http://sap.com/xi/XI/System/File", "FileName");
  
    //Write the FileName parameter from the Dynamic Configuration based on the key
    config.put(key1, FieldValue);
    success = true;
  }catch(Exception ee){
    success = false;
  }
  return success;
}