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) {
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;
}
}