Class AbstractItemReader

  • All Implemented Interfaces:
    ItemReader

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

      • AbstractItemReader

        public AbstractItemReader()
    • Method Detail

      • 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.