Package org.neo4j.gds.core.loading

Class NoopDoubleCodec

java.lang.Object

org.neo4j.gds.core.loading.DoubleCodec

org.neo4j.gds.core.loading.NoopDoubleCodec

public final class NoopDoubleCodec
extends DoubleCodec

Nested Class Summary

Nested classes/interfaces inherited from class org.neo4j.gds.core.loading.DoubleCodec

DoubleCodec.CompressionInfo

Field Summary

Fields inherited from class org.neo4j.gds.core.loading.DoubleCodec

EXP_BIAS, EXP_BIT_MASK, SIGNIFICAND_BITS, SIGNIFICANT_BIT_MASK, SUPER_NORMAL_EXPONENT

Method Summary

Modifier and Type	Method	Description
int	compressDouble(long doubleBits, byte[] out, int outPos)	Compress the double from its bit representation and write result into out.
int	compressedSize(byte[] data, int pos)	Return the number of bytes used to compress the current value.
int	decompressDouble(byte[] data, int pos, org.apache.commons.lang3.mutable.MutableDouble out)	Decompress a single double from the given byte array and write the result into out.
DoubleCodec.CompressionInfo	describeCompressedValue(byte[] data, int pos, double originalInput)	Return debug info about how the current value is compressed.
java.lang.String	describeCompression(int type)	Return some string description on how the data is compressed.
static DoubleCodec	instance()

Methods inherited from class org.neo4j.gds.core.loading.DoubleCodec

compressDouble, compressDoubles, decompressDouble, decompressDoubles, getSign, getSignificand, getUnbiasedExponent, supportedSignificandWith

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static DoubleCodec instance()

compressDouble

public int compressDouble(long doubleBits,
                          byte[] out,
                          int outPos)

Description copied from class: DoubleCodec

Compress the double from its bit representation and write result into out.

Specified by:

compressDouble in class DoubleCodec

Parameters:

doubleBits - the double value as converted by Double.doubleToRawLongBits(double).

out - the output buffer where the compressed value is written to.

outPos - at which position to write the compressed value in out.

Returns:

the new value of outPos (NOT the number of bytes written).

decompressDouble

public int decompressDouble(byte[] data,
                            int pos,
                            org.apache.commons.lang3.mutable.MutableDouble out)

Description copied from class: DoubleCodec

Decompress a single double from the given byte array and write the result into out.

Specified by:

decompressDouble in class DoubleCodec

Parameters:

data - the compressed data.

pos - start reading from data at this position.

out - output value, the result should be written using MutableDouble.doubleValue().

Returns:

the new value of pos after reading the compressed value.

compressedSize

public int compressedSize(byte[] data,
                          int pos)

Description copied from class: DoubleCodec

Return the number of bytes used to compress the current value.

Specified by:

compressedSize in class DoubleCodec

Parameters:

data - the compressed data.

pos - start reading from data at this position.

Returns:

the number of bytes that the compressed value at pos is.

describeCompression

public java.lang.String describeCompression(int type)

Description copied from class: DoubleCodec

Return some string description on how the data is compressed. For debugging or testing.

Specified by:

describeCompression in class DoubleCodec

Parameters:

type - a type identifier.

Returns:

some string for describing how the data is compressed.

describeCompressedValue

public DoubleCodec.CompressionInfo describeCompressedValue(byte[] data,
                                                           int pos,
                                                           double originalInput)

Description copied from class: DoubleCodec

Return debug info about how the current value is compressed. For debugging or testing.

Specified by:

describeCompressedValue in class DoubleCodec

Parameters:

data - the compressed data.

pos - start reading from data at this position.

Returns:

info object describing the current compressed value.