Example usage for org.apache.cassandra.db PartitionPosition kind

Introduction

In this page you can find the example usage for org.apache.cassandra.db PartitionPosition kind.

Prototype

public Kind kind();

Source Link

Usage

From source file:com.stratio.cassandra.lucene.IndexServiceWide.java

License:Apache License

/** {@inheritDoc} */
@Override//from   ww w. j  a v a  2 s.com
public Optional<Query> query(DataRange dataRange) {

    // Extract data range data
    PartitionPosition startPosition = dataRange.startKey();
    PartitionPosition stopPosition = dataRange.stopKey();
    Token startToken = startPosition.getToken();
    Token stopToken = stopPosition.getToken();
    Optional<ClusteringPrefix> maybeStartClustering = KeyMapper.startClusteringPrefix(dataRange);
    Optional<ClusteringPrefix> maybeStopClustering = KeyMapper.stopClusteringPrefix(dataRange);

    // Prepare query builder
    BooleanQuery.Builder builder = new BooleanQuery.Builder();

    // Add first partition filter
    maybeStartClustering.ifPresent(startClustering -> {
        DecoratedKey startKey = (DecoratedKey) startPosition;
        builder.add(keyMapper.query(startKey, startClustering, null, false, true), SHOULD);
    });

    // Add token range filter
    boolean includeStart = startPosition.kind() == MIN_BOUND && !maybeStartClustering.isPresent();
    boolean includeStop = stopPosition.kind() == MAX_BOUND && !maybeStopClustering.isPresent();
    tokenMapper.query(startToken, stopToken, includeStart, includeStop).ifPresent(x -> builder.add(x, SHOULD));

    // Add last partition filter
    maybeStopClustering.ifPresent(stopClustering -> {
        DecoratedKey stopKey = (DecoratedKey) stopPosition;
        builder.add(keyMapper.query(stopKey, null, stopClustering, true, false), SHOULD);
    });

    // Return query, or empty if there are no restrictions
    BooleanQuery query = builder.build();
    return query.clauses().isEmpty() ? Optional.empty() : Optional.of(query);
}

---

From source file:com.stratio.cassandra.lucene.key.TokenMapper.java

License:Apache License

/**
 * Returns if the specified lower partition position must be included in a filtered range.
 *
 * @param position a {@link PartitionPosition}
 * @return {@code true} if {@code position} must be included, {@code false} otherwise
 *//*  w w  w .  j a va  2 s  . com*/
public boolean includeStart(PartitionPosition position) {
    return position.kind() == PartitionPosition.Kind.MIN_BOUND;
}

---

From source file:com.stratio.cassandra.lucene.key.TokenMapper.java

License:Apache License

/**
 * Returns if the specified upper partition position must be included in a filtered range.
 *
 * @param position a {@link PartitionPosition}
 * @return {@code true} if {@code position} must be included, {@code false} otherwise
 *///from  w w  w . j av  a2  s.c  o  m
public boolean includeStop(PartitionPosition position) {
    return position.kind() == PartitionPosition.Kind.MAX_BOUND;
}

---