Package it.unimi.dsi.big.webgraph

Class EFGraph.EliasFanoSuccessorReader

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected long curr
      The current word position in the list of upper bits.
      long currentIndex
      The index of the current prefix sum.
      protected it.unimi.dsi.fastutil.longs.LongBigList graph
      The underlying list.
      protected int log2Quantum
      The logarithm of the quantum, cached from the graph.
      protected long outdegree
      The outdegree.
      protected int pointerSize
      The size of a pointer.
      protected int quantum
      The quantum, cached from the graph.
      protected EFGraph.LongWordBitReader skipPointers
      The longword bit reader for pointers.
      protected long skipPointersStart
      The starting position of the pointers.
      protected long upperBitsStart
      The starting position of the upper bits.
      protected long window
      The 64-bit window.

    • Constructor Summary

      Constructors 
      Constructor Description
      EliasFanoSuccessorReader​(long n, long upperBound, it.unimi.dsi.fastutil.longs.LongBigList graph, long outdegree, long skipPointersStart, int log2Quantum)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      long nextLong()
      The next long returned by this iterator, or the special marker if this iterator is exhausted.
      long skipTo​(long lowerBound)
      Skips to a given element.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • graph

        protected final it.unimi.dsi.fastutil.longs.LongBigList graph
        The underlying list.

      • skipPointersStart

        protected final long skipPointersStart
        The starting position of the pointers.

      • upperBitsStart

        protected final long upperBitsStart
        The starting position of the upper bits.

      • log2Quantum

        protected final int log2Quantum
        The logarithm of the quantum, cached from the graph.

      • quantum

        protected final int quantum
        The quantum, cached from the graph.

      • pointerSize

        protected final int pointerSize
        The size of a pointer.

      • outdegree

        protected final long outdegree
        The outdegree.

      • window

        protected long window
        The 64-bit window.

      • curr

        protected long curr
        The current word position in the list of upper bits.

      • currentIndex

        public long currentIndex
        The index of the current prefix sum.

    • Constructor Detail

      • EliasFanoSuccessorReader

        public EliasFanoSuccessorReader​(long n,
                                long upperBound,
                                it.unimi.dsi.fastutil.longs.LongBigList graph,
                                long outdegree,
                                long skipPointersStart,
                                int log2Quantum)

    • Method Detail

      • nextLong

        public long nextLong()
        Description copied from interface: LazyLongIterator
        The next long returned by this iterator, or the special marker if this iterator is exhausted.
        Specified by:
        nextLong in interface LazyLongIterator
        Returns:
        next long returned by this iterator, or the special marker if this iterator is exhausted.

      • skipTo

        public long skipTo​(long lowerBound)
        Description copied from interface: LazyLongSkippableIterator
        Skips to a given element.

        Note that this interface is fragile: after LazyLongSkippableIterator.END_OF_LIST has been returned, the behavour of further calls to this method will be unpredictable.

        Specified by:
        skipTo in interface LazyLongSkippableIterator
        Parameters:
        lowerBound - a lower bound to the returned element.
        Returns:
        if the last returned element is greater than or equal to lowerBound, the last returned element; otherwise, the smallest element greater than or equal to lowerBound that would be returned by this iterator, or LazyLongSkippableIterator.END_OF_LIST if no such element exists.

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object