Class AbstractItemReader

java.lang.Object
javax.batch.api.chunk.AbstractItemReader
All Implemented Interfaces:
ItemReader

public abstract class AbstractItemReader extends Object implements ItemReader
The AbstractItemReader provides default implementations of less commonly implemented methods.
  • Constructor Details

    • AbstractItemReader

      public AbstractItemReader()
  • Method Details

    • open

      public void open(Serializable checkpoint) throws Exception
      Override this method if the ItemReader requires any open time processing. The default implementation does nothing.
      Specified by:
      open in interface ItemReader
      Parameters:
      checkpoint - last checkpoint for this ItemReader - may be null.
      Throws:
      Exception - (or subclass) if an error occurs.
    • close

      public void close() throws Exception
      Override this method if the ItemReader requires any close time processing. The default implementation does nothing.
      Specified by:
      close in interface ItemReader
      Throws:
      Exception - (or subclass) if an error occurs.
    • readItem

      public abstract Object readItem() throws Exception
      Implement read logic for the ItemReader in this method.
      Specified by:
      readItem in interface ItemReader
      Returns:
      next item or null
      Throws:
      Exception - (or subclass) if an error occurs.
    • checkpointInfo

      public Serializable checkpointInfo() throws Exception
      Override this method if the ItemReader supports checkpoints. The default implementation returns null.
      Specified by:
      checkpointInfo in interface ItemReader
      Returns:
      checkpoint data
      Throws:
      Exception - (or subclass) if an error occurs.