content: /*
   * 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.kstream;
  
  
  /**
   * The result key type of a windowed stream aggregation.
   * <p>
   * If a {@link KStream} gets grouped and aggregated using a window-aggregation the resulting {@link KTable} is a
   * so-called "windowed {@link KTable}" with a combined key type that encodes the corresponding aggregation window and
   * the original record key.
   * Thus, a windowed {@link KTable} has type {@code <Windowed<K>,V>}.
   *
   * @param <K> type of the key
   * @see KGroupedStream#windowedBy(Windows)
   * @see KGroupedStream#windowedBy(SessionWindows)
   */
  public class Windowed<K> {
  
      private final K key;
  
      private final Window window;
  
      public Windowed(final K key, final Window window) {
          this.key = key;
          this.window = window;
      }
  
      /**
       * Return the key of the window.
       *
       * @return the key of the window
       */
      public K key() {
          return key;
      }
  
      /**
       * Return the window containing the values associated with this key.
       *
       * @return the window containing the values
       */
      public Window window() {
          return window;
      }
  
      @Override
      public String toString() {
          return "[" + key + "@" + window.start() + "/" + window.end() + "]";
      }
  
      @Override
      public boolean equals(final Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof Windowed)) {
              return false;
          }
          final Windowed<?> that = (Windowed) obj;
          return window.equals(that.window) && key.equals(that.key);
      }
  
      @Override
      public int hashCode() {
          final long n = ((long) window.hashCode() << 32) | key.hashCode();
          return (int) (n % 0xFFFFFFFFL);
      }
  }
  