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.cluster;
  
  import java.util.Arrays;
  
  public class Topology
  {
      public final int[] primaryKeys;
      public final int[] membersOfRing;
      public final long[] membersOfRingTokens;
      public final int[] membersOfQuorum;
      public final int[] rf;
      public final int quorumRf;
      public final int[][] replicasForKeys;
      public final int[][] pendingReplicasForKeys;
  
      public Topology(int[] primaryKeys, int[] membersOfRing, long[] membersOfRingTokens, int[] membersOfQuorum, int[] rf, int quorumRf, int[][] replicasForKeys, int[][] pendingReplicasForKeys)
      {
          for (int i = 0 ; i < primaryKeys.length ; ++i)
          {
              if (replicasForKeys[i].length != quorumRf)
                  throw new AssertionError(String.format("Inconsistent ownership information: %s (expect %d)", Arrays.toString(replicasForKeys[i]), quorumRf));
          }
          this.primaryKeys = primaryKeys;
          this.membersOfRing = membersOfRing;
          this.membersOfRingTokens = membersOfRingTokens;
          this.membersOfQuorum = membersOfQuorum;
          this.rf = rf;
          this.quorumRf = quorumRf;
          this.replicasForKeys = replicasForKeys;
          this.pendingReplicasForKeys = pendingReplicasForKeys;
      }
  
      public int[] pendingKeys()
      {
          int count = 0;
          for (int i = 0 ; i < pendingReplicasForKeys.length ; ++i)
          {
              if (pendingReplicasForKeys[i].length > 0)
                  ++count;
          }
          int[] pendingKeys = new int[count];
          count = 0;
          for (int i = 0 ; i < pendingReplicasForKeys.length ; ++i)
          {
              if (pendingReplicasForKeys[i].length == 0)
                  continue;
              pendingKeys[count] = primaryKeys[i];
              count++;
          }
          return pendingKeys;
      }
  
      public Topology select(int[] selectPrimaryKeys)
      {
          int[][] newReplicasForKeys = new int[selectPrimaryKeys.length][];
          int[][] newPendingReplicasForKeys = new int[selectPrimaryKeys.length][];
          int in = 0, out = 0;
          while (out < newReplicasForKeys.length)
          {
              if (primaryKeys[in] < selectPrimaryKeys[out])
              {
                  ++in;
                  continue;
              }
              if (primaryKeys[in] > selectPrimaryKeys[out])
                  throw new AssertionError();
  
              newReplicasForKeys[out] = replicasForKeys[in];
              newPendingReplicasForKeys[out] = pendingReplicasForKeys[in];
              ++in;
              ++out;
          }
          return new Topology(selectPrimaryKeys, membersOfRing, membersOfRingTokens, membersOfQuorum, rf, quorumRf,
                              newReplicasForKeys, newPendingReplicasForKeys);
      }
  }