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 com.datastax.oss.driver.internal.core.metadata.token;
  
  import com.datastax.oss.driver.api.core.metadata.token.Token;
  import com.datastax.oss.driver.api.core.metadata.token.TokenRange;
  import com.datastax.oss.driver.shaded.guava.common.base.Preconditions;
  import com.datastax.oss.protocol.internal.util.Bytes;
  import java.nio.ByteBuffer;
  import net.jcip.annotations.ThreadSafe;
  
  @ThreadSafe
  public class ByteOrderedTokenFactory implements TokenFactory {
  
    public static final String PARTITIONER_NAME = "org.apache.cassandra.dht.ByteOrderedPartitioner";
  
    public static final ByteOrderedToken MIN_TOKEN = new ByteOrderedToken(ByteBuffer.allocate(0));
  
    @Override
    public String getPartitionerName() {
      return PARTITIONER_NAME;
    }
  
    @Override
    public Token hash(ByteBuffer partitionKey) {
      return new ByteOrderedToken(partitionKey);
    }
  
    @Override
    public Token parse(String tokenString) {
      // This method must be able to parse the contents of system.peers.tokens, which do not have the
      // "0x" prefix. On the other hand, OPPToken#toString has the "0x" because it should be usable in
      // a CQL query, and it's nice to have fromString and toString symmetrical. So handle both cases:
      if (!tokenString.startsWith("0x")) {
        String prefix = (tokenString.length() % 2 == 0) ? "0x" : "0x0";
        tokenString = prefix + tokenString;
      }
      ByteBuffer value = Bytes.fromHexString(tokenString);
      return new ByteOrderedToken(value);
    }
  
    @Override
    public String format(Token token) {
      Preconditions.checkArgument(
          token instanceof ByteOrderedToken, "Can only format ByteOrderedToken instances");
      return Bytes.toHexString(((ByteOrderedToken) token).getValue());
    }
  
    @Override
    public Token minToken() {
      return MIN_TOKEN;
    }
  
    @Override
    public TokenRange range(Token start, Token end) {
      Preconditions.checkArgument(
          start instanceof ByteOrderedToken && end instanceof ByteOrderedToken,
          "Can only build ranges of ByteOrderedToken instances");
      return new ByteOrderedTokenRange(((ByteOrderedToken) start), ((ByteOrderedToken) end));
    }
  }
  