Package org.neo4j.gds.core.loading

Class AdjacencyCompression

java.lang.Object

org.neo4j.gds.core.loading.AdjacencyCompression

public final class AdjacencyCompression
extends java.lang.Object

Method Summary

Modifier and Type	Method	Description
static int	applyDeltaEncoding(long[] data, int length, org.neo4j.gds.core.Aggregation aggregation)
static int	applyDeltaEncoding(LongArrayBuffer data, org.neo4j.gds.core.Aggregation aggregation)
static int	compress(long[] data, byte[] out, int length)
static int	compress(long[] data, int offset, int length, byte[] out)
static int	compress(LongArrayBuffer data, byte[] out)
static void	copyFrom(long[] into, byte[] targets, int compressedValues, int limit, AdjacencyCompressor.ValueMapper mapper)
static void	copyFrom(LongArrayBuffer into, byte[] targets, int compressedValues, int limit, AdjacencyCompressor.ValueMapper mapper)	Decompress the given array into the given into.
static long[]	decompress(byte[] compressed, int numberOfValues)
static byte[]	deltaEncodeAndCompress(long[] values, int offset, int length, org.neo4j.gds.core.Aggregation aggregation)
static int	deltaEncodeSortedValues(long[] values, int offset, int length, org.neo4j.gds.core.Aggregation aggregation)
static void	prefixSumDeltaEncodedValues(long[] values, int length)

Methods inherited from class java.lang.Object

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

Method Detail

copyFrom

public static void copyFrom(LongArrayBuffer into,
                            byte[] targets,
                            int compressedValues,
                            int limit,
                            AdjacencyCompressor.ValueMapper mapper)

Decompress the given array into the given into. After this, LongArrayBuffer.length will reflect the number of decompressed values that are in the LongArrayBuffer.buffer.

copyFrom

public static void copyFrom(long[] into,
                            byte[] targets,
                            int compressedValues,
                            int limit,
                            AdjacencyCompressor.ValueMapper mapper)

applyDeltaEncoding

public static int applyDeltaEncoding(LongArrayBuffer data,
                                     org.neo4j.gds.core.Aggregation aggregation)

applyDeltaEncoding

public static int applyDeltaEncoding(long[] data,
                                     int length,
                                     org.neo4j.gds.core.Aggregation aggregation)

compress

public static int compress(LongArrayBuffer data,
                           byte[] out)

compress

public static int compress(long[] data,
                           byte[] out,
                           int length)

compress

public static int compress(long[] data,
                           int offset,
                           int length,
                           byte[] out)

deltaEncodeAndCompress

public static byte[] deltaEncodeAndCompress(long[] values,
                                            int offset,
                                            int length,
                                            org.neo4j.gds.core.Aggregation aggregation)

decompress

public static long[] decompress(byte[] compressed,
                                int numberOfValues)

deltaEncodeSortedValues

public static int deltaEncodeSortedValues(long[] values,
                                          int offset,
                                          int length,
                                          org.neo4j.gds.core.Aggregation aggregation)

prefixSumDeltaEncodedValues

public static void prefixSumDeltaEncodedValues(long[] values,
                                               int length)