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 com.alibaba.jstorm.window;
  
  import java.io.Serializable;
  
  /**
   * A {@link TimeWindow} that represents a time interval from {@code start} (inclusive) to
   * {@code start + size} (exclusive).
   */
  public class TimeWindow implements Serializable {
      private static final long serialVersionUID = 1L;
  
      private final long start;
      private final long end;
  
      public TimeWindow() {
          this.start = 0;
          this.end = 0;
      }
  
      public TimeWindow(long start, long end) {
          this.start = start;
          this.end = end;
      }
  
      public long getStart() {
          return start;
      }
  
      public long getEnd() {
          return end;
      }
  
      public long maxTimestamp() {
          return end - 1;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          TimeWindow window = (TimeWindow) o;
  
          return end == window.end && start == window.start;
      }
  
      @Override
      public int hashCode() {
          int result = (int) (start ^ (start >>> 32));
          result = 31 * result + (int) (end ^ (end >>> 32));
          return result;
      }
  
      @Override
      public String toString() {
          return "TimeWindow[" + start + ", " + end + "]";
      }
  
      /**
       * Returns {@code true} if this window intersects the given window.
       */
      public boolean intersects(TimeWindow other) {
          return this.start <= other.end && this.end >= other.start;
      }
  
      /**
       * Returns the minimal window covers both this window and the given window.
       */
      public TimeWindow cover(TimeWindow other) {
          return new TimeWindow(Math.min(start, other.start), Math.max(end, other.end));
      }
  
  }
  