Package org.apache.druid.collections.bitmap

Interface BitmapFactory

    • Method Detail

      • makeEmptyMutableBitmap

        MutableBitmap makeEmptyMutableBitmap()
        Create a new empty bitmap
        Returns:
        the new bitmap

      • mapImmutableBitmap

        ImmutableBitmap mapImmutableBitmap​(ByteBuffer b)
        Given a ByteBuffer pointing at a serialized version of a bitmap, instantiate an immutable mapped bitmap. When using RoaringBitmap (with the RoaringBitmapFactory class), it is not necessary for b.limit() to indicate the end of the serialized content whereas it is critical to set b.limit() appropriately with ConciseSet (with the ConciseBitmapFactory).
        Parameters:
        b - the input byte buffer
        Returns:
        the new bitmap

      • union

        ImmutableBitmap union​(Iterable<ImmutableBitmap> b)
        Compute the union (bitwise-OR) of a set of bitmaps. They are assumed to be instances of of the proper WrappedConciseBitmap otherwise a ClassCastException is thrown.
        Parameters:
        b - input ImmutableGenericBitmap objects
        Returns:
        the union.
        Throws:
        ClassCastException - if one of the ImmutableGenericBitmap objects if not an instance of WrappedImmutableConciseBitmap

      • intersection

        ImmutableBitmap intersection​(Iterable<ImmutableBitmap> b)
        Compute the intersection (bitwise-AND) of a set of bitmaps. They are assumed to be instances of the proper WrappedConciseBitmap otherwise a ClassCastException is thrown.
        Parameters:
        b - input ImmutableGenericBitmap objects
        Returns:
        the union.
        Throws:
        ClassCastException - if one of the ImmutableGenericBitmap objects if not an instance of WrappedImmutableConciseBitmap