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.cassandra.simulator.paxos;
  
  import org.apache.cassandra.distributed.api.SimpleQueryResult;
  
  class Observation implements Comparable<Observation>
  {
      final int id;
      final SimpleQueryResult result;
      final int start;
      final int end;
  
      Observation(int id, SimpleQueryResult result, int start, int end)
      {
          this.id = id;
          this.result = result;
          this.start = start;
          this.end = end;
      }
  
      boolean isSuccess()
      {
          return result != null;
      }
  
      boolean isUnknownFailure()
      {
          return result == null;
      }
  
      // computes a PARTIAL ORDER on when the outcome occurred, i.e. for many pair-wise comparisons the answer is 0
      public int compareTo(Observation that)
      {
          if (this.end < that.start)
              return -1;
          if (that.end < this.start)
              return 1;
          return 0;
      }
  }
  