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.internals;
  
  import org.apache.kafka.streams.kstream.Window;
  
  /**
   * A session window covers a closed time interval with its start and end timestamp both being an inclusive boundary.
   * <p>
   * For time semantics, see {@link org.apache.kafka.streams.processor.TimestampExtractor TimestampExtractor}.
   *
   * @see TimeWindow
   * @see UnlimitedWindow
   * @see org.apache.kafka.streams.kstream.SessionWindows
   * @see org.apache.kafka.streams.processor.TimestampExtractor
   */
  public final class SessionWindow extends Window {
  
      /**
       * Create a new window for the given start time and end time (both inclusive).
       *
       * @param startMs the start timestamp of the window
       * @param endMs   the end timestamp of the window
       * @throws IllegalArgumentException if {@code startMs} is negative or if {@code endMs} is smaller than {@code startMs}
       */
      public SessionWindow(final long startMs, final long endMs) throws IllegalArgumentException {
          super(startMs, endMs);
      }
  
      /**
       * Check if the given window overlaps with this window.
       *
       * @param other another window
       * @return {@code true} if {@code other} overlaps with this window&mdash;{@code false} otherwise
       * @throws IllegalArgumentException if the {@code other} window has a different type than {@code this} window
       */
      public boolean overlap(final Window other) throws IllegalArgumentException {
          if (getClass() != other.getClass()) {
              throw new IllegalArgumentException("Cannot compare windows of different type. Other window has type "
                  + other.getClass() + ".");
          }
          final SessionWindow otherWindow = (SessionWindow) other;
          return !(otherWindow.endMs < startMs || endMs < otherWindow.startMs);
      }
  
  }
  