Package org.apache.sysds.runtime.transform.encode

Class ColumnEncoderFeatureHash

java.lang.Object
org.apache.sysds.runtime.transform.encode.ColumnEncoder
org.apache.sysds.runtime.transform.encode.ColumnEncoderFeatureHash
All Implemented Interfaces:
Externalizable, Serializable, Comparable<ColumnEncoder>, Encoder
public class ColumnEncoderFeatureHash extends ColumnEncoder
Class used for feature hashing transformation of frames.
See Also:

  • Constructor Details

    • ColumnEncoderFeatureHash

      public ColumnEncoderFeatureHash(int colID, long K)

    • ColumnEncoderFeatureHash

      public ColumnEncoderFeatureHash()

  • Method Details

    • getK

      public long getK()

    • build

      public void build(CacheBlock<?> in)
      Description copied from interface: Encoder
      Build the transform meta data for the given block input. This call modifies and keeps meta data as encoder state.
      Parameters:
      in - input frame block

    • getBuildTasks

      public List<DependencyTask<?>> getBuildTasks(CacheBlock<?> in)
      Overrides:
      getBuildTasks in class ColumnEncoder

    • mergeAt

      public void mergeAt(ColumnEncoder other)
      Description copied from class: ColumnEncoder
      Merges another encoder, of a compatible type, in after a certain position. Resizes as necessary. ColumnEncoders are compatible with themselves and EncoderComposite is compatible with every other ColumnEncoders. MultiColumnEncoders are compatible with every encoder
      Overrides:
      mergeAt in class ColumnEncoder
      Parameters:
      other - the encoder that should be merged in

    • allocateMetaData

      public void allocateMetaData(FrameBlock meta)
      Description copied from interface: Encoder
      Pre-allocate a FrameBlock for metadata collection.
      Parameters:
      meta - frame block

    • getMetaData

      public FrameBlock getMetaData(FrameBlock meta)
      Description copied from interface: Encoder
      Construct a frame block out of the transform meta data.
      Parameters:
      meta - output frame block
      Returns:
      output frame block?

    • initMetaData

      public void initMetaData(FrameBlock meta)
      Description copied from interface: Encoder
      Sets up the required meta data for a subsequent call to apply.
      Parameters:
      meta - frame block

    • writeExternal

      public void writeExternal(ObjectOutput out) throws IOException
      Description copied from class: ColumnEncoder
      Redirects the default java serialization via externalizable to our default hadoop writable serialization for efficient broadcast/rdd serialization.
      Specified by:
      writeExternal in interface Externalizable
      Overrides:
      writeExternal in class ColumnEncoder
      Parameters:
      out - object output
      Throws:
      IOException - if IOException occurs

    • readExternal

      public void readExternal(ObjectInput in) throws IOException
      Description copied from class: ColumnEncoder
      Redirects the default java serialization via externalizable to our default hadoop writable serialization for efficient broadcast/rdd deserialization.
      Specified by:
      readExternal in interface Externalizable
      Overrides:
      readExternal in class ColumnEncoder
      Parameters:
      in - object input
      Throws:
      IOException - if IOException occur

    • toString

      public String toString()
      Overrides:
      toString in class Object