Package com.illumon.iris.db.v2.hashing

Interface ChunkHasher

All Known Implementing Classes:
BooleanArrayChunkHasher, BooleanChunkHasher, ByteArrayChunkHasher, ByteChunkHasher, CharArrayChunkHasher, CharChunkHasher, DoubleArrayChunkHasher, DoubleChunkHasher, FloatArrayChunkHasher, FloatChunkHasher, IntArrayChunkHasher, IntChunkHasher, LongArrayChunkHasher, LongChunkHasher, ObjectArrayChunkHasher, ObjectArrayChunkShallowHasher, ObjectChunkHasher, ShortArrayChunkHasher, ShortChunkHasher
public interface ChunkHasher

  • Method Details

    • hashInitial

      void hashInitial​(Chunk<Attributes.Values> values, WritableIntChunk<Attributes.HashCode> destination)
      Called for the first (or only) hash value, sets the hash codes in destination corresponding to values.
      Parameters:
      values - the values to hash
      destination - the chunk to write hash values into

    • hashUpdate

      void hashUpdate​(Chunk<Attributes.Values> values, WritableIntChunk<Attributes.HashCode> destination)
      Called for subsequent hash values, updates the hash codes in destination corresponding to values.
      Parameters:
      values - the values to hash
      destination - the chunk to update hash values into

    • hashInitial

      int hashInitial​(Object value)
      Hash a boxed object.
      Parameters:
      value - the boxed object to hash
      Returns:
      the hashcode, as if you called the chunked version of this function

    • hashUpdate

      int hashUpdate​(int existing, Object value)
      Update a hash for a boxed object.
      Parameters:
      existing - the existing hashcode
      value - the boxed object to add to the hash code
      Returns:
      the hashcode, as if you called the chunked version of this function

    • makeHasher

      static ChunkHasher makeHasher​(ChunkType chunkType, Class<?> columnType, Class<?> componentType)

    • makeArrayHasher

      static ChunkHasher makeArrayHasher​(Class<?> componentType)

    • scrambleHash

      static int scrambleHash​(int x)