code: private EntranceProcessingItem createEntrancePi(EntranceProcessor processor) {
          EntranceProcessingItem epi = this.componentFactory.createEntrancePi(processor);
          this.topology.addEntranceProcessingItem(epi);
          if (this.mapProcessorToProcessingItem == null)
              this.mapProcessorToProcessingItem = new HashMap<Processor, IProcessingItem>();
          this.mapProcessorToProcessingItem.put(processor, epi);
          return epi;
      }
docs: Creates a platform specific entrance processing item.
  
  @param processor
  @return