| /* |
| * Copyright 1999-2012 Alibaba Group. |
| * |
| * Licensed 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 com.alibaba.dubbo.rpc.cluster.merger; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import com.alibaba.dubbo.rpc.cluster.Merger; |
| |
| /** |
| * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a> |
| */ |
| public class SetMerger implements Merger<Set<?>> { |
| |
| public static final String NAME = "set"; |
| |
| public static final SetMerger INSTANCE = new SetMerger(); |
| |
| public Set<Object> merge(Set<?>... items) { |
| |
| Set<Object> result = new HashSet<Object>(); |
| |
| for (Set<?> item : items) { |
| if (item != null) { |
| result.addAll(item); |
| } |
| } |
| |
| return result; |
| } |
| } |