Package org.springframework.batch.item.function

Class SupplierItemReader<T>

java.lang.Object
org.springframework.batch.item.function.SupplierItemReader<T>
Type Parameters:
T - type of items to read
All Implemented Interfaces:
ItemReader<T>
public class SupplierItemReader<T> extends Object implements ItemReader<T>
Adapter for a Supplier to an ItemReader.
Since:
5.2
Author:
Mahmoud Ben Hassine

  • Constructor Details

    • SupplierItemReader

      public SupplierItemReader(Supplier<T> supplier)
      Create a new SupplierItemReader.
      Parameters:
      supplier - the supplier to use to read items. Must not be null.

  • Method Details

    • read

      public T read() throws Exception
      Description copied from interface: ItemReader
      Reads a piece of input data and advance to the next one. Implementations must return null at the end of the input data set. In a transactional setting, caller might get the same item twice from successive calls (or otherwise), if the first call was in a transaction that rolled back.
      Specified by:
      read in interface ItemReader<T>
      Returns:
      T the item to be processed or null if the data source is exhausted
      Throws:
      ParseException - if there is a problem parsing the current record (but the next one may still be valid)
      NonTransientResourceException - if there is a fatal exception in the underlying resource. After throwing this exception implementations should endeavour to return null from subsequent calls to read.
      UnexpectedInputException - if there is an uncategorised problem with the input data. Assume potentially transient, so subsequent calls to read might succeed.
      Exception - if an there is a non-specific error.