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.gms;
  
  import org.apache.cassandra.dht.IPartitioner;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.utils.ByteArrayUtil;
  import org.apache.cassandra.utils.FBUtilities;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.*;
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Collection;
  
  public class TokenSerializer
  {
      private static final Logger logger = LoggerFactory.getLogger(TokenSerializer.class);
  
      public static void serialize(IPartitioner partitioner, Collection<Token> tokens, DataOutput out) throws IOException
      {
          for (Token token : tokens)
          {
              ByteBuffer tokenBuffer = partitioner.getTokenFactory().toByteArray(token);
              assert tokenBuffer.arrayOffset() == 0;
              ByteArrayUtil.writeWithLength(tokenBuffer.array(), out);
          }
          out.writeInt(0);
      }
  
      public static Collection<Token> deserialize(IPartitioner partitioner, DataInput in) throws IOException
      {
          Collection<Token> tokens = new ArrayList<Token>();
          while (true)
          {
              int size = in.readInt();
              if (size < 1)
                  break;
              if (logger.isTraceEnabled())
                  logger.trace("Reading token of {}", FBUtilities.prettyPrintMemory(size));
              byte[] bintoken = new byte[size];
              in.readFully(bintoken);
              tokens.add(partitioner.getTokenFactory().fromByteArray(ByteBuffer.wrap(bintoken)));
          }
          return tokens;
      }
  }
  