| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 org.apache.gossip.crdt; |
| |
| import java.util.function.BiFunction; |
| |
| @SuppressWarnings("rawtypes") |
| public class CrdtBiFunctionMerge implements BiFunction<Crdt,Crdt,Crdt> { |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public Crdt apply(Crdt t, Crdt u) { |
| if (t == null && u == null){ |
| return null; |
| } else if (t == null){ |
| return u; |
| } else if (u == null){ |
| return t; |
| } |
| if (! u.getClass().equals(t.getClass())){ |
| throw new IllegalArgumentException( "Can not merge " + t.getClass() + " "+ u.getClass()); |
| } |
| return t.merge(u); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public static Crdt applyStatic(Crdt t, Crdt u){ |
| if (t == null && u == null){ |
| return null; |
| } else if (t == null){ |
| return u; |
| } else if (u == null){ |
| return t; |
| } |
| if (! u.getClass().equals(t.getClass())){ |
| throw new IllegalArgumentException( "Can not merge " + t.getClass() + " "+ u.getClass()); |
| } |
| return t.merge(u); |
| } |
| } |