/* * Copyright 2013 The Netty Project * * The Netty Project licenses this file to you under the Apache License, * version 2.0 (the "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. */ package io.netty.channel.nio; import java.nio.channels.SelectionKey; import java.util.AbstractSet; import java.util.Arrays; import java.util.Iterator; import java.util.NoSuchElementException; final class SelectedSelectionKeySet extends AbstractSet { SelectionKey[] keys; int size; SelectedSelectionKeySet() { keys = new SelectionKey[1024]; } @Override public boolean add(SelectionKey o) { if (o == null) { return false; } keys[size++] = o; if (size == keys.length) { increaseCapacity(); } return true; } @Override public boolean remove(Object o) { return false; } @Override public boolean contains(Object o) { return false; } @Override public int size() { return size; } @Override public Iterator iterator() { return new Iterator() { 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]; System.arraycopy(keys, 0, newKeys, 0, size); keys = newKeys; } }