Package com.illumon.iris.db.v2.sources

Class SingleValueObjectColumnSource<DATA_TYPE>

java.lang.Object
com.illumon.iris.db.v2.sources.AbstractColumnSource<DATA_TYPE>
com.illumon.iris.db.v2.sources.SingleValueObjectColumnSource<DATA_TYPE>
All Implemented Interfaces:
ChunkSource<Attributes.Values>, ChunkSource.WithPrev<Attributes.Values>, DefaultChunkSource<Attributes.Values>, DefaultChunkSource.WithPrev<Attributes.Values>, FillContextMaker, GetContextMaker, ColumnSource<DATA_TYPE>, ColumnSourceGetDefaults.ForObject<DATA_TYPE>, ElementSource<DATA_TYPE>, ImmutableColumnSource<DATA_TYPE>, ImmutableColumnSourceGetDefaults.ForObject<DATA_TYPE>, Releasable, TupleExporter<DATA_TYPE>, TupleSource<DATA_TYPE>, Serializable
public class SingleValueObjectColumnSource<DATA_TYPE>
extends AbstractColumnSource<DATA_TYPE>
implements ImmutableColumnSourceGetDefaults.ForObject<DATA_TYPE>
ColumnSource implementation for columns of a single unique value.
See Also:
Serialized Form

  • Constructor Details

  • Method Details

    • get

      public DATA_TYPE get​(long index)
      Description copied from interface: ElementSource
      Get the value from the source. This may return boxed values for basic types.
      Specified by:
      get in interface ElementSource<DATA_TYPE>
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the value at the index, potentially null.

    • startTrackingPrevValues

      public void startTrackingPrevValues()
      Description copied from interface: ColumnSource
      ColumnSource implementations that track previous values have the option to not actually start tracking previous values until this method is called. This is an option, not an obligation: some simple ColumnSource implementations (like TSingleValueSource for various T) always track previous values; other implementations (like PrevColumnSource) never do; some (like TArrayColumnSource) only start tracking once this method is called. An immutable column source can not have distinct prev values; therefore it is implemented as a no-op.
      Specified by:
      startTrackingPrevValues in interface ColumnSource<DATA_TYPE>