56 lines
1.7 KiB
Java
56 lines
1.7 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.gossip.crdt;
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import java.util.function.BiFunction;
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@SuppressWarnings("rawtypes")
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public class CrdtBiFunctionMerge implements BiFunction<Crdt,Crdt,Crdt> {
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@SuppressWarnings("unchecked")
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@Override
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public Crdt apply(Crdt t, Crdt u) {
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if (t == null && u == null){
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return null;
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} else if (t == null){
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return u;
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} else if (u == null){
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return t;
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}
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if (! u.getClass().equals(t.getClass())){
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throw new IllegalArgumentException( "Can not merge " + t.getClass() + " "+ u.getClass());
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}
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return t.merge(u);
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}
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@SuppressWarnings("unchecked")
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public static Crdt applyStatic(Crdt t, Crdt u){
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if (t == null && u == null){
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return null;
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} else if (t == null){
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return u;
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} else if (u == null){
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return t;
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}
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if (! u.getClass().equals(t.getClass())){
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throw new IllegalArgumentException( "Can not merge " + t.getClass() + " "+ u.getClass());
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}
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return t.merge(u);
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}
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}
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