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 java.util.Objects;
  
  /**
   * A class bounding the processing state {@link Position} during queries. This can be used to
   * specify that a query should fail if the locally available partition isn't caught up to the
   * specified bound. "Unbounded" places no restrictions on the current location of the partition.
   */
  @Evolving
  public class PositionBound {
  
      private final Position position;
  
      private PositionBound(final Position position) {
          this.position = position.copy();
      }
  
      /**
       * Creates a new PositionBound representing "no bound"
       */
      public static PositionBound unbounded() {
          return new PositionBound(Position.emptyPosition());
      }
  
      /**
       * Creates a new PositionBound representing a specific position.
       */
      public static PositionBound at(final Position position) {
          return new PositionBound(position);
      }
  
      /**
       * Returns true iff this object specifies that there is no position bound.
       */
      public boolean isUnbounded() {
          return position.isEmpty();
      }
  
      /**
       * Returns the specific position of this bound.
       */
      public Position position() {
          return position;
      }
  
      @Override
      public String toString() {
          return "PositionBound{position=" + position + '}';
      }
  
      @Override
      public boolean equals(final Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
          final PositionBound that = (PositionBound) o;
          return Objects.equals(position, that.position);
      }
  
      @Override
      public int hashCode() {
          throw new UnsupportedOperationException(
              "This mutable object is not suitable as a hash key");
      }
  }
  