water.parser

Class Categorical

java.lang.Object

water.Iced

water.parser.Categorical

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, Freezable

public final class Categorical
extends Iced

Class for tracking categorical (factor) columns. Basically a wrapper around non blocking hash map. In the first pass, we just collect set of unique strings per column (if there are less than MAX_CATEGORICAL_COUNT unique elements). After pass1, the keys are sorted and indexed alphabetically. In the second pass, map is used only for lookup and never updated. Categorical objects are shared among threads on the local nodes!

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_CATEGORICAL_COUNT
static int	MAX_EXAMPLES

Method Summary

Methods

Modifier and Type	Method and Description
void	convertToUTF8(int col)
Categorical	read_impl(AutoBuffer ab) Implementation of the Iced serialization protocol, only called by auto-genned code.
Categorical	readJSON_impl(AutoBuffer ab) Implementation of the Iced serialization protocol, only called by auto-genned code.
java.lang.String	toString()
AutoBuffer	write_impl(AutoBuffer ab) Implementation of the Iced serialization protocol, only called by auto-genned code.
AutoBuffer	writeJSON_impl(AutoBuffer ab) Implementation of the Iced serialization protocol, only called by auto-genned code.

Methods inherited from class water.Iced

clone, copyOver, frozenType, read, readExternal, readJSON, toJsonString, write, writeExternal, writeJSON

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

MAX_CATEGORICAL_COUNT

public static final int MAX_CATEGORICAL_COUNT

See Also:

Constant Field Values

MAX_EXAMPLES

public static final int MAX_EXAMPLES

See Also:

Constant Field Values

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

convertToUTF8

public void convertToUTF8(int col)

write_impl

public AutoBuffer write_impl(AutoBuffer ab)

Description copied from class: Iced

Implementation of the Iced serialization protocol, only called by auto-genned code. Not intended to be called by user code. Override only for custom Iced serializers.

Specified by:

write_impl in interface Freezable

Overrides:

write_impl in class Iced

Parameters:

ab - AutoBuffer to write this object to.

Returns:

Returns the original AutoBuffer for flow-coding.

read_impl

public Categorical read_impl(AutoBuffer ab)

Description copied from class: Iced

Implementation of the Iced serialization protocol, only called by auto-genned code. Not intended to be called by user code. Override only for custom Iced serializers.

Specified by:

read_impl in interface Freezable

Overrides:

read_impl in class Iced

Parameters:

ab - AutoBuffer to read this object from.

Returns:

Returns a new instance of object reconstructed from AutoBuffer.

writeJSON_impl

public AutoBuffer writeJSON_impl(AutoBuffer ab)

Description copied from class: Iced

Implementation of the Iced serialization protocol, only called by auto-genned code. Not intended to be called by user code. Override only for custom Iced serializers.

Specified by:

writeJSON_impl in interface Freezable

Overrides:

writeJSON_impl in class Iced

Parameters:

ab - AutoBuffer to write this object to.

Returns:

Returns the original AutoBuffer for flow-coding.

readJSON_impl

public Categorical readJSON_impl(AutoBuffer ab)

Description copied from class: Iced

Implementation of the Iced serialization protocol, only called by auto-genned code. Not intended to be called by user code. Override only for custom Iced serializers.

Specified by:

readJSON_impl in interface Freezable

Overrides:

readJSON_impl in class Iced

Parameters:

ab - AutoBuffer to read this object from.

Returns:

Returns an instance of object reconstructed from JSON data.