water.fvec

Class TransfVec

java.lang.Object

water.Iced

water.fvec.Vec

water.fvec.WrappedVec

water.fvec.TransfVec

All Implemented Interfaces:

java.lang.Cloneable, Freezable

public class TransfVec
extends WrappedVec

Dummy vector transforming values of given vector according to given domain mapping.

The mapping is defined by a simple hash map composed of two arrays. The first array contains values. Index of values is index into the second array _indexes which contains final value (i.e., index to domain array).

If _indexes array is null, then index of found value is used directly.

To avoid virtual calls or additional null check for _indexes the vector returns two implementation of underlying chunk (TransfChunk when _indexes is not null, and FlatTransfChunk when _indexes is null.

Nested Class Summary

Nested classes/interfaces inherited from class water.fvec.Vec

Vec.CollectDomain, Vec.VectorGroup

Field Summary

Fields inherited from class water.fvec.Vec

_domain, _espc, _key, _time, KEY_PREFIX_LEN, LOG_CHK, MAX_ENUM_SIZE

Constructor Summary

Constructors

Constructor and Description
TransfVec(int[][] mapping, Key masterVecKey, Key key, long[] espc)
TransfVec(int[][] mapping, java.lang.String[] domain, Key masterVecKey, Key key, long[] espc)
TransfVec(int[] values, int[] indexes, java.lang.String[] domain, Key masterVecKey, Key key, long[] espc)

Method Summary

Methods

Modifier and Type	Method and Description
Chunk	chunkForChunkIdx(int cidx) The Chunk for a chunk#.
Vec	compose(int[][] transfMap, java.lang.String[] domain) Compose this vector with given transformation.
static Vec	compose(TransfVec origVec, int[][] transfMap, java.lang.String[] domain, boolean keepOrig) Compose given origVector with given transformation.

Methods inherited from class water.fvec.WrappedVec

masterVec

Methods inherited from class water.fvec.Vec

align, at, at8, byteSize, cardinality, checkMissing, chunk2StartElem, chunkForRow, chunkIdx, chunkKey, chunkLen, domain, domain, equals, getVecKey, group, hashCode, isBad, isConst, isEnum, isInt, isNA, isTime, length, make1Elem, make1Elem, makeCon, makeCon, makeCon, makeCons, makeConSeq, makeSeq, makeTransf, makeZero, makeZero, makeZeros, makeZeros, max, mean, min, naCnt, nChunks, newKey, postWrite, readable, remove, rollupStats, rollupStats, set, set, set, setNA, sigma, timeMode, timeParse, toEnum, toString, writable

Methods inherited from class water.Iced

clone, frozenType, init, newInstance, read, toDocField, write, writeJSON, writeJSONFields

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TransfVec

public TransfVec(int[][] mapping,
         Key masterVecKey,
         Key key,
         long[] espc)

TransfVec

public TransfVec(int[][] mapping,
         java.lang.String[] domain,
         Key masterVecKey,
         Key key,
         long[] espc)

TransfVec

public TransfVec(int[] values,
         int[] indexes,
         java.lang.String[] domain,
         Key masterVecKey,
         Key key,
         long[] espc)

Method Detail

chunkForChunkIdx

public Chunk chunkForChunkIdx(int cidx)

Description copied from class: Vec

The Chunk for a chunk#. Warning: this loads the data locally!

Specified by:

chunkForChunkIdx in class WrappedVec

compose

public Vec compose(int[][] transfMap,
          java.lang.String[] domain)

Compose this vector with given transformation. Always return a new vector

compose

public static Vec compose(TransfVec origVec,
          int[][] transfMap,
          java.lang.String[] domain,
          boolean keepOrig)

Compose given origVector with given transformation. Always returns a new vector. Original vector is kept if keepOrig is true.

Parameters:

origVec -

transfMap -

keepOrig -

Returns:

a new instance of TransfVec composing transformation of origVector and tranfsMap