Package org.gridgain.internal.columnar

Class NativeCursor

java.lang.Object
org.gridgain.internal.columnar.NativeCursor
All Implemented Interfaces:
AutoCloseable
public class NativeCursor extends Object implements AutoCloseable
Native cursor for using with Columnar Storage.

  • Constructor Summary

    Constructors
    Constructor
    Description
    NativeCursor(long nativeCursorHandle)
    Creates a Java cursor object for a given C++ cursor object.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    close()
    Release native cursor instance.
    org.apache.ignite.internal.schema.BinaryTupleSchema
    getTupleSchema()
    Returns binary tuple schema for the cursor.
    boolean
    hasNextPage()
    This method indicates whether the cursor has more data to read.
    ByteBuffer[]
    nextPage()
    Returns the next data page, if available.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • NativeCursor

      public NativeCursor(long nativeCursorHandle)
      Creates a Java cursor object for a given C++ cursor object.
      Parameters:
      nativeCursorHandle - ID of a native C++ cursor object.

  • Method Details

    • getTupleSchema

      public org.apache.ignite.internal.schema.BinaryTupleSchema getTupleSchema()
      Returns binary tuple schema for the cursor.
      Returns:
      Binary tuple schema.

    • nextPage

      public ByteBuffer[] nextPage() throws NoSuchElementException
      Returns the next data page, if available.

      To check if data is available hasNextPage() must be called prior calling this method.

      Returns:
      An array of tuples fetched from the native storage by this cursor.
      Throws:
      NoSuchElementException

    • hasNextPage

      public boolean hasNextPage()
      This method indicates whether the cursor has more data to read.
      Returns:
      true if there is at least one more page of data available, false otherwise.

    • close

      public void close()
      Release native cursor instance.
      Specified by:
      close in interface AutoCloseable