Example usage for org.apache.cassandra.db Slices get

Introduction

In this page you can find the example usage for org.apache.cassandra.db Slices get.

Prototype

public abstract Slice get(int i);

Source Link

Document

Returns the ith slice of this Slices object.

Usage

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

License:Apache License

/**
 * Returns the start {@link ClusteringPrefix} of the first partition of the specified {@link DataRange}.
 *
 * @param dataRange the data range/*from   www .j  a va2  s  .c  o  m*/
 * @return the start clustering prefix of {@code dataRange}, or {@code null} if there is no such start
 */
public static Optional<ClusteringPrefix> startClusteringPrefix(DataRange dataRange) {
    PartitionPosition startPosition = dataRange.startKey();
    if (startPosition instanceof DecoratedKey) {
        DecoratedKey startKey = (DecoratedKey) startPosition;
        ClusteringIndexFilter filter = dataRange.clusteringIndexFilter(startKey);
        if (filter instanceof ClusteringIndexSliceFilter) {
            ClusteringIndexSliceFilter sliceFilter = (ClusteringIndexSliceFilter) filter;
            Slices slices = sliceFilter.requestedSlices();
            return Optional.of(slices.get(0).start());
        }
    }
    return Optional.empty();
}

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

License:Apache License

/**
 * Returns the stop {@link ClusteringPrefix} of the last partition of the specified {@link DataRange}.
 *
 * @param dataRange the data range/*from w w w .  j a v a 2 s  .  co  m*/
 * @return the stop clustering prefix of {@code dataRange}, or {@code null} if there is no such start
 */
public static Optional<ClusteringPrefix> stopClusteringPrefix(DataRange dataRange) {
    PartitionPosition stopPosition = dataRange.stopKey();
    if (stopPosition instanceof DecoratedKey) {
        DecoratedKey stopKey = (DecoratedKey) stopPosition;
        ClusteringIndexFilter filter = dataRange.clusteringIndexFilter(stopKey);
        if (filter instanceof ClusteringIndexSliceFilter) {
            ClusteringIndexSliceFilter sliceFilter = (ClusteringIndexSliceFilter) filter;
            Slices slices = sliceFilter.requestedSlices();
            return Optional.of(slices.get(slices.size() - 1).end());
        }
    }
    return Optional.empty();
}

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

License:Apache License

/**
 * Returns a Lucene {@link Query} to retrieve all the rows in the specified clustering slice filter.
 *
 * @param key the partition key//from  ww  w .  ja v  a  2s . co  m
 * @param sliceFilter the slice filter
 * @return the Lucene query
 */
public Query query(DecoratedKey key, ClusteringIndexSliceFilter sliceFilter) {
    Slices slices = sliceFilter.requestedSlices();
    ClusteringPrefix startBound = slices.get(0).start();
    ClusteringPrefix stopBound = slices.get(slices.size() - 1).end();
    return query(key, startBound, stopBound, false, false);
}

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