content: /* Copyright 2010, Object Management Group, Inc.
   * Copyright 2010, PrismTech, Inc.
   * Copyright 2010, Real-Time Innovations, Inc.
   * All rights reserved.
   *
   * Licensed 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.omg.dds.sub;
  
  /**
   * For each instance (identified by the key), the Data Distribution Service internally maintains a
   * ViewState relative to each DataReader.
   * The ViewState can either be NEW or NOT_NEW.
   */
  public enum ViewState {
      // -----------------------------------------------------------------------
      // States
      // -----------------------------------------------------------------------
      /**
       *  NEW indicates that either this is the first time that the DataReader has ever accessed samples
       *  of that instance, or else that the DataReader has accessed previous samples of the instance,
       *  but the instance has since been reborn (i.e. becomes not-alive and then alive again).
       */
      NEW(0x0001 << 0),
      /**
       * NOT_NEW indicates that the DataReader has already accessed samples of the same instance
       * and that the instance has not been reborn since.
       */
      NOT_NEW(0x0001 << 1);
  
  
  
      // -----------------------------------------------------------------------
      // Constants
      // -----------------------------------------------------------------------
  
      public final int value;
  
  
  
      // -----------------------------------------------------------------------
      // Object Life Cycle
      // -----------------------------------------------------------------------
  
      private ViewState(int value) {
          this.value = value;
      }
  
  }
  