Package org.apache.hadoop.ozone.container.common.interfaces

Interface BlockIterator<T>

Type Parameters:
T -
All Superinterfaces:
AutoCloseable, Closeable
All Known Implementing Classes:
AbstractDatanodeStore.KeyValueBlockIterator, AbstractDatanodeStore.KeyValueBlockLocalIdIterator
public interface BlockIterator<T> extends Closeable
Block Iterator for container. Each container type need to implement this interface.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    hasNext()
    This checks if iterator has next element.
    T
    nextBlock()
    Get next block in the container.
    void
    seekToFirst()
    Seek to first entry.
    void
    seekToLast()
    Seek to last entry.

    Methods inherited from interface java.io.Closeable

    close

  • Method Details

    • hasNext

      boolean hasNext() throws IOException
      This checks if iterator has next element. If it has returns true, otherwise false.
      Returns:
      boolean
      Throws:
      IOException

    • seekToFirst

      void seekToFirst()
      Seek to first entry.

    • seekToLast

      void seekToLast()
      Seek to last entry.

    • nextBlock

      T nextBlock() throws IOException, NoSuchElementException
      Get next block in the container.
      Returns:
      next block or null if there are no blocks
      Throws:
      IOException
      NoSuchElementException