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.collect.Lists;
  import java.math.BigInteger;
  import java.util.List;
  import net.jcip.annotations.Immutable;
  
  @Immutable
  public class Murmur3TokenRange extends TokenRangeBase {
  
    private static final BigInteger RING_END = BigInteger.valueOf(Long.MAX_VALUE);
    private static final BigInteger RING_LENGTH =
        RING_END.subtract(BigInteger.valueOf(Long.MIN_VALUE));
  
    public Murmur3TokenRange(Murmur3Token start, Murmur3Token end) {
      super(start, end, Murmur3TokenFactory.MIN_TOKEN);
    }
  
    @Override
    protected TokenRange newTokenRange(Token start, Token end) {
      return new Murmur3TokenRange((Murmur3Token) start, (Murmur3Token) end);
    }
  
    @Override
    protected List<Token> split(Token startToken, Token endToken, int numberOfSplits) {
      // edge case: ]min, min] means the whole ring
      if (startToken.equals(endToken) && startToken.equals(Murmur3TokenFactory.MIN_TOKEN)) {
        endToken = Murmur3TokenFactory.MAX_TOKEN;
      }
  
      BigInteger start = BigInteger.valueOf(((Murmur3Token) startToken).getValue());
      BigInteger end = BigInteger.valueOf(((Murmur3Token) endToken).getValue());
  
      BigInteger range = end.subtract(start);
      if (range.compareTo(BigInteger.ZERO) < 0) {
        range = range.add(RING_LENGTH);
      }
  
      List<BigInteger> values = super.split(start, range, RING_END, RING_LENGTH, numberOfSplits);
      List<Token> tokens = Lists.newArrayListWithExpectedSize(values.size());
      for (BigInteger value : values) {
        tokens.add(new Murmur3Token(value.longValue()));
      }
      return tokens;
    }
  }
  