Class SparseBitSet.AbstractStrategy

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected AbstractStrategy()  
    • Method Summary

      All Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      protected abstract boolean block​(int base, int u3, int v3, long[] a3, long[] b3)
      Deals with a part of a block that consists of whole words, starting with the given first index, and ending with the word before the last index.
      protected void finish​(int a2Count, int a3Count)
      This is called to finish the processing started by the strategy (if there needs to be anything done at all).
      protected boolean isZeroBlock​(long[] a3)
      Check whether a level3 block is all zero.
      protected abstract int properties()
      Properties of this strategy.
      protected abstract boolean start​(SparseBitSet b)
      Instances of this class are to be serially reusable.
      protected abstract boolean word​(int base, int u3, long[] a3, long[] b3, long mask)
      Deal with a scan that include a partial word within a level3 block.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • AbstractStrategy

        protected AbstractStrategy()
    • Method Detail

      • properties

        protected abstract int properties()
        Properties of this strategy.
        Returns:
        the int containing the bits representing the properties of this strategy
        Since:
        1.6
      • start

        protected abstract boolean start​(SparseBitSet b)
        Instances of this class are to be serially reusable. To start a particular use, an instance is (re-)started by calling this method. It is passed the reference to the other bit set (usually to allow a check on whether it is null or not, so as to simplify the implementation of the block() method.
        Parameters:
        b - the "other" set, for whatever checking is needed.
        Returns:
        true -> if the cache should be set to zero
        Since:
        1.6
      • word

        protected abstract boolean word​(int base,
                                        int u3,
                                        long[] a3,
                                        long[] b3,
                                        long mask)
        Deal with a scan that include a partial word within a level3 block. All that is required is that the result be stored (if needed) into the given a set block at the correct position, and that the operation only affect those bits selected by 1 bits in the mask.
        Parameters:
        base - the base index of the block (to be used if needed)
        u3 - the index of the word within block
        a3 - the level3 block from the a set.
        b3 - the (nominal) level3 block from the b set (not null).
        mask - for the (partial) word
        Returns:
        true if the resulting word is zero
        Since:
        1.6
      • block

        protected abstract boolean block​(int base,
                                         int u3,
                                         int v3,
                                         long[] a3,
                                         long[] b3)
        Deals with a part of a block that consists of whole words, starting with the given first index, and ending with the word before the last index. For the words processed, the return value should indicate whether all those resulting words were zero, or not.
        Parameters:
        base - the base index of the block (to be used if needed)
        u3 - the index of the first word within block to process
        v3 - the index of the last word, which may be within block
        a3 - the level3 block from the a set.
        b3 - the (nominal) level3 block from the b set (not null).
        Returns:
        true if the words scanned within the level3 block were all zero
        Since:
        1.6
      • finish

        protected void finish​(int a2Count,
                              int a3Count)
        This is called to finish the processing started by the strategy (if there needs to be anything done at all).
        Parameters:
        a2Count - possible count of level2 areas in use
        a3Count - possible count of level3 blocks in use
        Since:
        1.6
      • isZeroBlock

        protected final boolean isZeroBlock​(long[] a3)
        Check whether a level3 block is all zero.
        Parameters:
        a3 - the block from the a set
        Returns:
        true if the values of the level3 block are all zero
        Since:
        1.6