Method initializeStorage

src/main/java/net/agkn/hll/HLL.java:484–502

Initializes storage for the specified HLLType and changes the instance's #type. @param type the HLLType to initialize storage for. This cannot be null and must be an instantiable type. (For instance, it cannot be HLLType#UNDEFINED.)

(final HLLType type)

     *        it cannot be {@link HLLType#UNDEFINED}.)
     */
    private void initializeStorage(final HLLType type) {
        this.type = type;
        switch(type) {
            case EMPTY:
                // nothing to be done
                break;
            case EXPLICIT:
                this.explicitStorage = new LongOpenHashSet();
                break;
            case SPARSE:
                this.sparseProbabilisticStorage = new Int2ByteOpenHashMap();
                break;
            case FULL:
                this.probabilisticStorage = new BitVector(regwidth, m);
                break;
            default:
                throw new RuntimeException("Unsupported HLL type " + type);
        }
    }

    // ========================================================================
    // Cardinality