SelectedSelectionKeySet Class — netty Architecture

Source Code

transport/src/main/java/io/netty/channel/nio/SelectedSelectionKeySet.java lines 25–109

final class SelectedSelectionKeySet extends AbstractSet<SelectionKey> {

    SelectionKey[] keys;
    int size;

    SelectedSelectionKeySet() {
        keys = new SelectionKey[1024];
    }

    @Override
    public boolean add(SelectionKey o) {
        if (o == null) {
            return false;
        }

        if (size == keys.length) {
            increaseCapacity();
        }

        keys[size++] = o;
        return true;
    }

    @Override
    public boolean remove(Object o) {
        return false;
    }

    @Override
    public boolean contains(Object o) {
        SelectionKey[] array = keys;
        for (int i = 0, s = size; i < s; i++) {
            SelectionKey k = array[i];
            if (k.equals(o)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public int size() {
        return size;
    }

    @Override
    public Iterator<SelectionKey> iterator() {
        return new Iterator<SelectionKey>() {
            private int idx;

            @Override
            public boolean hasNext() {
                return idx < size;
            }

            @Override
            public SelectionKey next() {
                if (!hasNext()) {
                    throw new NoSuchElementException();
                }
                return keys[idx++];
            }

            @Override
            public void remove() {
                throw new UnsupportedOperationException();
            }
        };
    }

    void reset() {
        reset(0);
    }

    void reset(int start) {
        Arrays.fill(keys, start, size, null);
        size = 0;
    }

    private void increaseCapacity() {
        SelectionKey[] newKeys = new SelectionKey[keys.length << 1];