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.query;
  
  import org.apache.kafka.common.annotation.InterfaceStability.Evolving;
  import org.apache.kafka.streams.state.WindowStoreIterator;
  
  import java.time.Instant;
  import java.util.Optional;
  
  @Evolving
  public class WindowKeyQuery<K, V> implements Query<WindowStoreIterator<V>> {
  
      private final K key;
      private final Optional<Instant> timeFrom;
      private final Optional<Instant> timeTo;
  
      private WindowKeyQuery(final K key,
                             final Optional<Instant> timeTo,
                             final Optional<Instant> timeFrom) {
          this.key = key;
          this.timeFrom = timeFrom;
          this.timeTo = timeTo;
      }
  
      public static <K, V> WindowKeyQuery<K, V> withKeyAndWindowStartRange(final K key,
                                                                           final Instant timeFrom,
                                                                           final Instant timeTo) {
          return new WindowKeyQuery<>(key, Optional.of(timeFrom), Optional.of(timeTo));
      }
  
      public K getKey() {
          return key;
      }
  
      public Optional<Instant> getTimeFrom() {
          return timeFrom;
      }
  
      public Optional<Instant> getTimeTo() {
          return timeTo;
      }
  
      @Override
      public String toString() {
          return "WindowKeyQuery{" +
              "key=" + key +
              ", timeFrom=" + timeFrom +
              ", timeTo=" + timeTo +
              '}';
      }
  }