| /** |
| * 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.kafka.streams; |
| |
| import java.util.Objects; |
| |
| /** |
| * A key-value pair defined for a single Kafka Streams record. |
| * If the record comes directly from a Kafka topic then its |
| * key / value are defined as the message key / value. |
| * |
| * @param <K> Key type |
| * @param <V> Value type |
| */ |
| public class KeyValue<K, V> { |
| |
| /** The key of the key-value pair. */ |
| public final K key; |
| /** The value of the key-value pair. */ |
| public final V value; |
| |
| /** |
| * Create a new key-value pair. |
| * |
| * @param key the key |
| * @param value the value |
| */ |
| public KeyValue(K key, V value) { |
| this.key = key; |
| this.value = value; |
| } |
| |
| /** |
| * Create a new key-value pair. |
| * |
| * @param key the key |
| * @param value the value |
| * @param <K> the type of the key |
| * @param <V> the type of the value |
| * @return a new key value pair |
| */ |
| public static <K, V> KeyValue<K, V> pair(K key, V value) { |
| return new KeyValue<>(key, value); |
| } |
| |
| public String toString() { |
| return "KeyValue(" + key + ", " + value + ")"; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (this == other) |
| return true; |
| |
| if (other instanceof KeyValue) { |
| KeyValue otherKV = (KeyValue) other; |
| |
| return key == null ? otherKV.key == null : key.equals(otherKV.key) |
| && value == null ? otherKV.value == null : value.equals(otherKV.value); |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(key, value); |
| } |
| } |