Entry¶

public class Entry extends Union implements Data ¶

A reference implementation for the Data interface. This class is used to specify a single data entry. This implementation uses a C-style union so as to save memory space.

Author: Hyunsu Cho

Fields¶

fvalue¶

public Float32 fvalue¶: The value of the entry, in floating-point representation

missing¶

public Signed32 missing¶: If missing == -1, the entry is considered missing. Otherwise, the entry is not missing; check the other fields to obtain the actual value of the entry.

qvalue¶

public Signed32 qvalue¶: The value of the entry, in integer representation

Methods¶

byteOrder¶

public ByteOrder byteOrder()¶

The byte-order to use when serializing.

Returns: ByteOrder.LITTLE_ENDIAN, since this class will be serialized using the litte-endian byte order.

getFValue¶

public float getFValue()¶

Obtain the floating-point value stored by the entry.

Returns: floating-point value

getQValue¶

public int getQValue()¶

Obtain the integer value stored by the entry.

Returns: integer value

isMissing¶

public boolean isMissing()¶

Test whether the entry is missing.

Returns: whether the entry is missing

setFValue¶

public void setFValue(float val)¶

Assign a floating-point value to the entry.

Parameters

val – value to set

setMissing¶

public void setMissing()¶: Designate the entry as missing.

setQValue¶

public void setQValue(int val)¶

Assign an integer value to the entry. This is useful when feature values and split thresholds are quantized into integers.