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 backtype.storm.tuple;
  
  import backtype.storm.utils.Utils;
  import com.esotericsoftware.kryo.io.Input;
  import com.esotericsoftware.kryo.io.Output;
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Random;
  import java.util.Set;
  
  public class MessageId {
      private Map<Long, Long> _anchorsToIds;
  
      public MessageId() {
      }
  
      @Deprecated
      public static long generateId() {
          return Utils.secureRandomLong();
      }
  
      public static long generateId(Random rand) {
          return rand.nextLong();
      }
  
      public static MessageId makeUnanchored() {
          return makeId(new HashMap<Long, Long>());
      }
  
      public static MessageId makeId(Map<Long, Long> anchorsToIds) {
          return new MessageId(anchorsToIds);
      }
  
      public static MessageId makeRootId(long id, long val) {
          Map<Long, Long> anchorsToIds = new HashMap<>();
          anchorsToIds.put(id, val);
          return new MessageId(anchorsToIds);
      }
  
      protected MessageId(Map<Long, Long> anchorsToIds) {
          _anchorsToIds = anchorsToIds;
      }
  
      public boolean isAnchored() {
          return _anchorsToIds != null && _anchorsToIds.size() > 0;
      }
  
      public Map<Long, Long> getAnchorsToIds() {
          return _anchorsToIds;
      }
  
      public Set<Long> getAnchors() {
          return _anchorsToIds.keySet();
      }
  
      @Override
      public int hashCode() {
          return _anchorsToIds.hashCode();
      }
  
      @Override
      public boolean equals(Object other) {
          if (other instanceof MessageId) {
              return _anchorsToIds.equals(((MessageId) other)._anchorsToIds);
          } else {
              return false;
          }
      }
  
      @Override
      public String toString() {
          return _anchorsToIds.toString();
      }
  
      public void serialize(Output out) throws IOException {
          out.writeInt(_anchorsToIds.size(), true);
          for (Entry<Long, Long> anchorToId : _anchorsToIds.entrySet()) {
              out.writeLong(anchorToId.getKey());
              out.writeLong(anchorToId.getValue());
          }
      }
  
      public static MessageId deserialize(Input in) throws IOException {
          int numAnchors = in.readInt(true);
          if (numAnchors == 0) {
              return null;
          }
          Map<Long, Long> anchorsToIds = new HashMap<>();
          for (int i = 0; i < numAnchors; i++) {
              anchorsToIds.put(in.readLong(), in.readLong());
          }
          return new MessageId(anchorsToIds);
      }
  }