Package org.neo4j.gds.core.compression.common

Class AdjacencyCompression

  • public final class AdjacencyCompression
extends java.lang.Object

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static int applyDeltaEncoding​(long[] data, int length, long[][][] unsortedWeights, long[][] sortedWeights, org.neo4j.gds.core.Aggregation[] aggregations, boolean noAggregation)  
      static int applyDeltaEncoding​(long[] data, int length, org.neo4j.gds.core.Aggregation aggregation)  
      static int applyDeltaEncoding​(LongArrayBuffer data, long[][][] weights, long[][] sortedWeights, org.neo4j.gds.core.Aggregation[] aggregations, boolean noAggregation)  
      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 long compress​(long[] data, int offset, int length, long ptr)  
      static int compress​(LongArrayBuffer data, byte[] out)  
      static long[] decompress​(byte[] compressed, int numberOfValues)  
      static long decompress​(int numberOfValues, long ptr, long[] into, int offset)  
      static long decompressAndPrefixSum​(int numberOfValues, long previousValue, long ptr, long[] into, int offset)  
      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 byte[] ensureBufferSize​(LongArrayBuffer data, byte[] out)  
      static void findPosition​(int[] chunkLengths, int position, org.apache.commons.lang3.mutable.MutableInt pageIndex, org.apache.commons.lang3.mutable.MutableInt indexInPage)  
      static void prefixSumDeltaEncodedValues​(long[] values, int length)  
      static void zigZagUncompressFrom​(long[] into, byte[][] targets, int compressedValues, int limit, AdjacencyCompressor.ValueMapper mapper)  
      static void zigZagUncompressFrom​(LongArrayBuffer into, byte[][] targets, int compressedValues, int limit, AdjacencyCompressor.ValueMapper mapper)
      Decompress the given array into the given into.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • zigZagUncompressFrom

        public static void zigZagUncompressFrom​(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)

      • applyDeltaEncoding

        public static int applyDeltaEncoding​(LongArrayBuffer data,
                                     long[][][] weights,
                                     long[][] sortedWeights,
                                     org.neo4j.gds.core.Aggregation[] aggregations,
                                     boolean noAggregation)

      • applyDeltaEncoding

        public static int applyDeltaEncoding​(long[] data,
                                     int length,
                                     long[][][] unsortedWeights,
                                     long[][] sortedWeights,
                                     org.neo4j.gds.core.Aggregation[] aggregations,
                                     boolean noAggregation)

      • ensureBufferSize

        public static byte[] ensureBufferSize​(LongArrayBuffer data,
                                      byte[] out)

      • 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)

      • compress

        public static long compress​(long[] data,
                            int offset,
                            int length,
                            long ptr)

      • 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)

      • decompressAndPrefixSum

        public static long decompressAndPrefixSum​(int numberOfValues,
                                          long previousValue,
                                          long ptr,
                                          long[] into,
                                          int offset)

      • decompress

        public static long decompress​(int numberOfValues,
                              long ptr,
                              long[] into,
                              int offset)

      • 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)

      • findPosition

        public static void findPosition​(int[] chunkLengths,
                                int position,
                                org.apache.commons.lang3.mutable.MutableInt pageIndex,
                                org.apache.commons.lang3.mutable.MutableInt indexInPage)