ItemProcessor (Spring Batch 4.1.4.RELEASE API)

所有已知实现类:
AsyncItemProcessor, BeanValidatingItemProcessor, ClassifierCompositeItemProcessor, CompositeItemProcessor, CustomerCreditIncreaseProcessor, CustomerUpdateProcessor, FunctionItemProcessor, ItemProcessorAdapter, ItemProcessorAdapter, MessageProcessor, PassThroughItemProcessor, ScriptItemProcessor, SleepingItemProcessor, StagingItemProcessor, TradeProcessor, UserMailItemProcessor, ValidatingItemProcessor
```
public interface ItemProcessor<I,O>
```
Interface for item transformation. Given an item as input, this interface provides an extension point which allows for the application of business logic in an item oriented processing scenario. It should be noted that while it's possible to return a different type than the one provided, it's not strictly necessary. Furthermore, returning null indicates that the item should not be continued to be processed.
作者:
Robert Kasanicky, Dave Syer, Mahmoud Ben Hassine

- 方法概要
  所有方法实例方法抽象方法
  修饰符和类型方法说明
  O process(I item)
  Process the provided item, returning a potentially modified or new item for continued processing.

- 方法详细资料
  - process
```
@Nullable
O process(I item)
   throws java.lang.Exception
```
    Process the provided item, returning a potentially modified or new item for continued processing. If the returned result is null, it is assumed that processing of the item should not continue.
    参数:
    item - to be processed
    返回:
    potentially modified or new item for continued processing, null if processing of the provided item should not continue.
    抛出:
    java.lang.Exception - thrown if exception occurs during processing.