Example usage for org.apache.cassandra.db DataRange clusteringIndexFilter

Introduction

In this page you can find the example usage for org.apache.cassandra.db DataRange clusteringIndexFilter.

Prototype

ClusteringIndexFilter clusteringIndexFilter

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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   w  ww .  j  a va 2s  .  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/*w  w  w.  ja  v  a2 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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