javax.batch.api.chunk

Class AbstractItemReader

Contents
  • 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:
        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.

Document created the 11/06/2005, last modified the 18/08/2025
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References

  1. View the html document Language of the document:fr Manuel PHP : https://docs.oracle.com, AbstractItemReader (Java(TM) EE 7 Specification APIs)

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