1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements.  See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership.  The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License.  You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 package org.apache.zookeeper.server.watch;
20 
21 import java.util.Set;
22 import org.apache.zookeeper.Watcher;
23 import org.apache.zookeeper.server.util.BitHashSet;
24 
25 public class WatcherOrBitSet {
26 
27     private Set<Watcher> watchers;
28     private BitHashSet watcherBits;
29 
WatcherOrBitSet(final Set<Watcher> watchers)30     public WatcherOrBitSet(final Set<Watcher> watchers) {
31         this.watchers = watchers;
32     }
33 
WatcherOrBitSet(final BitHashSet watcherBits)34     public WatcherOrBitSet(final BitHashSet watcherBits) {
35         this.watcherBits = watcherBits;
36     }
37 
contains(Watcher watcher)38     public boolean contains(Watcher watcher) {
39         if (watchers == null) {
40             return false;
41         }
42         return watchers.contains(watcher);
43     }
44 
contains(int watcherBit)45     public boolean contains(int watcherBit) {
46         if (watcherBits == null) {
47             return false;
48         }
49         return watcherBits.contains(watcherBit);
50     }
51 
size()52     public int size() {
53         if (watchers != null) {
54             return watchers.size();
55         }
56         if (watcherBits != null) {
57             return watcherBits.size();
58         }
59         return 0;
60     }
61 
62 }
63