@NonNullApi

# Package org.springframework.batch.item.support

Internal support package

See: Description

- Class Summary
  Class | Description
  --- | ---
  AbstractFileItemWriter<T> | Base class for item writers that write data to a file or stream.
  AbstractItemCountingItemStreamItemReader<T> | Abstract superclass for `ItemReader`s that supports restart by storing item count in the `ExecutionContext` (therefore requires item ordering to be preserved between runs).
  AbstractItemStreamItemReader<T> | Base class for `ItemReader` implementations.
  AbstractItemStreamItemWriter<T> | Base class for `ItemWriter` implementations.
  ClassifierCompositeItemProcessor<I,O> | Calls one of a collection of ItemProcessors, based on a router pattern implemented through the provided `Classifier`.
  ClassifierCompositeItemWriter<T> | Calls one of a collection of ItemWriters for each item, based on a router pattern implemented through the provided `Classifier`.
  CompositeItemProcessor<I,O> | Composite `ItemProcessor` that passes the item through a sequence of injected `ItemTransformer`s (return value of previous transformation is the entry value of the next). Note the user is responsible for injecting a chain of `ItemProcessor`s that conforms to declared input and output types.
  CompositeItemStream | Simple `ItemStream` that delegates to a list of other streams.
  CompositeItemWriter<T> | Calls a collection of `ItemWriter`s in fixed-order sequence. The implementation is thread-safe if all delegates are thread-safe.
  IteratorItemReader<T> | An `ItemReader` that pulls data from a `Iterator` or `Iterable` using the constructors.
  ListItemReader<T> | An `ItemReader` that pulls data from a list.
  ListItemWriter<T> |
  PassThroughItemProcessor<T> | Simple `ItemProcessor` that does nothing - simply passes its argument through to the caller.
  ScriptItemProcessor<I,O> | `ItemProcessor` implementation that passes the current item to process to the provided script.
  SingleItemPeekableItemReader<T> | A `PeekableItemReader` that allows the user to peek one item ahead.
  SynchronizedItemStreamReader<T> | This is a simple ItemStreamReader decorator with a synchronized ItemReader.read() method - which makes a non-thread-safe ItemReader thread-safe.
  SynchronizedItemStreamWriter<T> | An `ItemStreamWriter` decorator with a synchronized `write()` method.

## Package org.springframework.batch.item.support Description

Internal support package