Package org.rcsb.cif.binary.codec

Class Classifier

java.lang.Object

org.rcsb.cif.binary.codec.Classifier

public class Classifier
extends Object

Classifies Int32Array and Float64Array instances, i.e. for the given information find the most efficient encoding strategy which results in the most compact storage of the data.

Constructor Summary

Constructors

Constructor	Description
Classifier()

Method Summary

Modifier and Type	Method	Description
static EncodingStrategyHint	classify(Float64Array data)	Auto-encodes this FloatArray by the encoding strategy with the minimal size.
static EncodingStrategyHint	classify(Int32Array data)	Auto-encodes this Int32Array by the encoding strategy with the minimal size.
static EncodingStrategyHint	classifyPrecision(Float64Array data)	Determines the precision needed to encode this column in a lossless fashion.
static ByteArray	encode(Int32Array column, String encoding)	Encode an Int32Array using the given encoding strategy.

Methods inherited from class java.lang.Object

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

Constructor Detail

Classifier

public Classifier()

Method Detail

classify

public static EncodingStrategyHint classify(Int32Array data)

Auto-encodes this Int32Array by the encoding strategy with the minimal size.

Parameters:

data - the data to encode

Returns:

the EncodingStrategyHint instance which provides all information needed to encode/decode it

encode

public static ByteArray encode(Int32Array column,
                               String encoding)

Encode an Int32Array using the given encoding strategy.

Parameters:

column - the data to encode

encoding - how to encode

Returns:

encoded data

classify

public static EncodingStrategyHint classify(Float64Array data)

Auto-encodes this FloatArray by the encoding strategy with the minimal size. All Float64Array instances are encoded as Int32Array after finding a reasonable FixedPointEncoding.

Parameters:

data - the data to encode

Returns:

the EncodingStrategyHint providing all information needed to encode/decode it

classifyPrecision

public static EncodingStrategyHint classifyPrecision(Float64Array data)

Determines the precision needed to encode this column in a lossless fashion.

Parameters:

data - the data to handle

Returns:

an EncodingStrategyHint instance with the determined precision stored in the precision field