public boolean merge()

in src/main/java/org/apache/commons/collections4/bloomfilter/SimpleBloomFilter.java [106:131]

• 25 lines of code
• 4 McCabe index (conditional complexity)

    public boolean merge(final BitMapProducer bitMapProducer) {
        Objects.requireNonNull(bitMapProducer, "bitMapProducer");
        try {
            final int[] idx = new int[1];
            bitMapProducer.forEachBitMap(value -> {
                bitMap[idx[0]++] |= value;
                return true;
            });
            // idx[0] will be limit+1 so decrement it
            idx[0]--;
            final int idxLimit = BitMap.getLongIndex(shape.getNumberOfBits());
            if (idxLimit == idx[0]) {
                final long excess = bitMap[idxLimit] >> shape.getNumberOfBits();
                if (excess != 0) {
                    throw new IllegalArgumentException(
                            String.format("BitMapProducer set a bit higher than the limit for the shape: %s",
                                    shape.getNumberOfBits()));
                }
            }
            cardinality = -1;
        } catch (final IndexOutOfBoundsException e) {
            throw new IllegalArgumentException(
                    String.format("BitMapProducer should send at most %s maps", bitMap.length), e);
        }
        return true;
    }