Package org.apache.sysds.runtime.frame.data.iterators

Interface IteratorFactory

public interface IteratorFactory
Factory pattern for construction of rowIterators of the FrameBlock.

  • Method Details

    • getStringRowIterator

      static RowIterator<String> getStringRowIterator(FrameBlock fb)
      Get a row iterator over the frame where all fields are encoded as strings independent of their value types.
      Parameters:
      fb - The frame to iterate through
      Returns:
      string array iterator

    • getStringRowIterator

      static RowIterator<String> getStringRowIterator(FrameBlock fb, int[] cols)
      Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
      Parameters:
      fb - The frame to iterate through
      cols - column selection, 1-based
      Returns:
      string array iterator

    • getStringRowIterator

      static RowIterator<String> getStringRowIterator(FrameBlock fb, int colID)
      Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
      Parameters:
      fb - The frame to iterate through
      colID - column selection, 1-based
      Returns:
      string array iterator

    • getStringRowIterator

      static RowIterator<String> getStringRowIterator(FrameBlock fb, int rl, int ru)
      Get a row iterator over the frame where all fields are encoded as strings independent of their value types.
      Parameters:
      fb - The frame to iterate through
      rl - lower row index
      ru - upper row index
      Returns:
      string array iterator

    • getStringRowIterator

      static RowIterator<String> getStringRowIterator(FrameBlock fb, int rl, int ru, int[] cols)
      Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
      Parameters:
      fb - The frame to iterate through
      rl - lower row index
      ru - upper row index
      cols - column selection, 1-based
      Returns:
      string array iterator

    • getStringRowIterator

      static RowIterator<String> getStringRowIterator(FrameBlock fb, int rl, int ru, int colID)
      Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
      Parameters:
      fb - The frame to iterate through
      rl - lower row index
      ru - upper row index
      colID - columnID, 1-based
      Returns:
      string array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb)
      Get a row iterator over the frame where all fields are encoded as boxed objects according to their value types.
      Parameters:
      fb - The frame to iterate through
      Returns:
      object array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb, Types.ValueType[] schema)
      Get a row iterator over the frame where all fields are encoded as boxed objects according to the value types of the provided target schema.
      Parameters:
      fb - The frame to iterate through
      schema - target schema of objects
      Returns:
      object array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb, int[] cols)
      Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.
      Parameters:
      fb - The frame to iterate through
      cols - column selection, 1-based
      Returns:
      object array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb, int colID)
      Get a row iterator over the frame where all selected fields are encoded as objects according to their value types.
      Parameters:
      fb - The frame to iterate through
      colID - column selection, 1-based
      Returns:
      object array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb, int rl, int ru)
      Get a row iterator over the frame where all fields are encoded as boxed objects according to their value types.
      Parameters:
      fb - The frame to iterate through
      rl - lower row index
      ru - upper row index
      Returns:
      object array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb, int rl, int ru, int[] cols)
      Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.
      Parameters:
      fb - The frame to iterate through
      rl - lower row index
      ru - upper row index
      cols - column selection, 1-based
      Returns:
      object array iterator

    • getObjectRowIterator

      static RowIterator<Object> getObjectRowIterator(FrameBlock fb, int rl, int ru, int colID)
      Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.
      Parameters:
      fb - The frame to iterate through
      rl - lower row index
      ru - upper row index
      colID - column selection, 1-based
      Returns:
      object array iterator