Package mondrian.rolap

Class BitKey.Small

java.lang.Object
mondrian.rolap.BitKey.AbstractBitKey
mondrian.rolap.BitKey.Small
All Implemented Interfaces:
Serializable, Comparable<BitKey>, Iterable<Integer>, BitKey
Enclosing interface:
BitKey
public static class BitKey.Small extends BitKey.AbstractBitKey
Implementation of BitKey for bit counts less than 64.
See Also:

  • Method Details

    • set

      public void set(int pos)
      Description copied from interface: BitKey
      Sets the bit at the specified index to true.

    • get

      public boolean get(int pos)
      Description copied from interface: BitKey
      Returns the value of the bit with the specified index. The value is true if the bit with the index bitIndex is currently set in this BitKey; otherwise, the result is false.

    • clear

      public void clear(int pos)
      Description copied from interface: BitKey
      Sets the bit specified by the index to false.

    • clear

      public void clear()
      Description copied from interface: BitKey
      Sets all of the bits in this BitKey to false.

    • cardinality

      public int cardinality()
      Description copied from interface: BitKey
      Returns the number of bits set.
      Returns:
      Number of bits set

    • or

      public BitKey or(BitKey bitKey)
      Description copied from interface: BitKey
      Or the parameter BitKey with this.
      Parameters:
      bitKey - Bit key

    • orNot

      public BitKey orNot(BitKey bitKey)
      Description copied from interface: BitKey
      XOr the parameter BitKey with this.
      Parameters:
      bitKey - Bit key

    • and

      public BitKey and(BitKey bitKey)
      Description copied from interface: BitKey
      Returns the boolean AND of this bitkey and the given bitkey.
      Parameters:
      bitKey - Bit key

    • andNot

      public BitKey andNot(BitKey bitKey)
      Description copied from interface: BitKey
      Returns a BitKey containing all of the bits in this BitSet whose corresponding bit is NOT set in the specified BitSet.

    • isSuperSetOf

      public boolean isSuperSetOf(BitKey bitKey)
      Description copied from interface: BitKey
      Is every bit set in the parameter bitKey also set in this. If one switches this with the parameter bitKey one gets the equivalent of isSubSetOf.
      Parameters:
      bitKey - Bit key

    • intersects

      public boolean intersects(BitKey bitKey)
      Description copied from interface: BitKey
      Returns whether this BitKey has any bits in common with a given BitKey.

    • toBitSet

      public BitSet toBitSet()
      Description copied from interface: BitKey
      Returns a BitSet with the same contents as this BitKey.

    • iterator

      public Iterator<Integer> iterator()
      To say that I am happy about this algorithm (or the variations of the algorithm used for the Mid128 and Big BitKey implementations) would be a stretch. It works but there has to be a more elegant and faster one but this is the best I could come up with in a couple of hours.

    • nextSetBit

      public int nextSetBit(int fromIndex)
      Description copied from interface: BitKey
      Returns the index of the first bit that is set to true that occurs on or after the specified starting index. If no such bit exists then -1 is returned. To iterate over the true bits in a BitKey, use the following loop: 
       for (int i = bk.nextSetBit(0); i >= 0; i = bk.nextSetBit(i + 1)) {
     // operate on index i here
 }
      Parameters:
      fromIndex - the index to start checking from (inclusive)
      Returns:
      the index of the next set bit

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • compareTo

      public int compareTo(BitKey bitKey)

    • compareToBig

      protected int compareToBig(BitKey.Big that)

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • copy

      public BitKey copy()
      Description copied from interface: BitKey
      Returns a copy of this BitKey.
      Returns:
      copy of BitKey

    • emptyCopy

      public BitKey emptyCopy()
      Description copied from interface: BitKey
      Returns an empty BitKey of the same type. This is the same as calling BitKey.copy() followed by BitKey.clear().
      Returns:
      BitKey of same type

    • isEmpty

      public boolean isEmpty()
      Description copied from interface: BitKey
      Returns true if this BitKey contains no bits that are set to true.