/* * Copyright 1999-2011 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.HashMap; import java.util.Map; import com.alibaba.dubbo.rpc.cluster.Merger; /** * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a> */ public class MapMerger implements Merger<Map<?, ?>> { public Map<?, ?> merge(Map<?, ?>... items) { if (items.length == 0) { return null; } Map<Object, Object> result = new HashMap<Object, Object>(); for (Map<?, ?> item : items) { if (item != null) { result.putAll(item); } } return result; } }