| /* |
| * 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.solr.common.util; |
| |
| import java.io.IOException; |
| import java.io.Serializable; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import org.apache.solr.common.MapWriter; |
| |
| import static org.apache.solr.common.util.Utils.makeMap; |
| import static org.apache.solr.common.util.Utils.toJSONString; |
| |
| public class Pair<T1, T2> implements Serializable, MapWriter { |
| private final T1 first; |
| private final T2 second; |
| |
| public T1 first() { |
| return first; |
| } |
| |
| public T2 second() { |
| return second; |
| } |
| |
| public Pair(T1 key, T2 value) { |
| this.first = key; |
| this.second = value; |
| } |
| |
| @Override |
| public boolean equals(Object that) { |
| return that instanceof Pair && |
| Objects.equals(this.first, ((Pair) that).first) && |
| Objects.equals(this.second, ((Pair) that).second); |
| } |
| |
| @Override |
| public String toString() { |
| return toJSONString(makeMap("first", first, "second", second)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(first, second); |
| } |
| |
| @Override |
| public void writeMap(EntryWriter ew) throws IOException { |
| ew.put("first", first); |
| ew.put("second", second); |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public static Pair parse(Map m) { |
| return new Pair(m.get("first"), m.get("second")); |
| } |
| |
| } |